Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail.

Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail. 
by

1 Answer

Answer :

Characteristics of common emitter [CE] configuration

image

Explanation : 

(1) Active Region: In this region collector junction is reverse biased and emitter junction is forward biased. It is the area to the right of VCE = 0.5 V and above IB= 0. In this region transistor current responds most sensitively to IB. If transistor is to be used as an amplifier, it must operate in this region. 


(2) Cut Off: In this region collector junction is reverse biased and emitter junction is reverse biased Cut off in a transistor is given by IB = 0, IC= ICO. 


(3) Saturation Region: In this region both junctions are forward biased. Since the voltage VBE and VBC across a forward is approximately 0.7 V therefore, VCE = VCB + VBE = - VBC + VBE is also few tenths of volts. In this region the transistor collector current is approximately given by VCC / RC and independent of base current. 

by

Related questions

Draw the output characteristics of BJT in CE configuration and label various regions on it.

Description : Draw the output characteristics of BJT in CE configuration and label various regions on it.

Last Answer :  output characteristics of BJT in CE configuration 

Sketch output characteristics of CE configuration. Show all the regions.

Description : Sketch output characteristics of CE configuration. Show all the regions.

Last Answer : Sketch output characteristics of CE configuration. Show all the regions.

Draw the input and output characteristics of CE configuration.

Description : Draw the input and output characteristics of CE configuration.

Last Answer : Input characteristics of CE configuration: Output characteristics of CE configuration:

Draw: (i) Input characteristics of transistor in CE mode. (ii) Output characteristics of transistor in CE mode and show different regions on it.

Description : Draw: (i) Input characteristics of transistor in CE mode. (ii) Output characteristics of transistor in CE mode and show different regions on it.

Last Answer : (i) Input characteristics of transistor in CE mode.   (ii) Output characteristics of transistor in CE mode and show different regions on it.  

Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.

Description : Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT ... configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.  

Last Answer : (i) BJT configuration having the least current gain : Common Base Configuration  (ii) KIT configuration called as voltage follower: Common Collector Configuration  (iii) BJT ... Emitter Configuration  (vi) BJT configuration having the least output impedance: Common Collector Configuration

Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms.

Description : Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms. 

Last Answer : Operation : During positive half cycle of an AC supply, D1 will forward biased and current starts flowing through load. The output voltage is equal to +Vs. During negative half cycle of an AC ... output voltage is equal to +Vs. In this pulsating DC waveform will be obtained at the load. 

Draw the circuit diagram of bridge rectifier with π filter. Draw its input and output waveform.

Description : Draw the circuit diagram of bridge rectifier with π filter. Draw its input and output waveform. 

Last Answer : Circuit diagram of bridge rectifier with π filter : Input and output waveform:

In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector

Last Answer : Answer: C

In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Last Answer : Answer: D

Why common emitter configuration is commonly used?

Description : Why common emitter configuration is commonly used?

Last Answer : Common emitter configuration is commonly used for amplifications because 1. The common emitter configuration (CE) provides maximum voltage and current gain and hence provides maximum power gain. The ... automatic impedance matching maximum power transfer will take place from one stage to other.

The ac bypassing of RF by CF in a common emitter configuration :

Description : The ac bypassing of RF by CF in a common emitter configuration :  (A) increases ac signal across emitter -base junction (B) decreases ac signal across emitter -base junction (C) decreases voltage amplification (D) stabilizes the Q -point

Last Answer : The ac bypassing of RF by CF in a common emitter configuration : increases ac signal across emitter -base junction

Which of the following combinations has no phase inversion of the signal? A) Two CE stages B) CE and CC stages C) Three CE stages D) CE stage and emitter follower.

Description : Which of the following combinations has no phase inversion of the signal? A) Two CE stages B) CE and CC stages C) Three CE stages D) CE stage and emitter follower.

Last Answer : A) Two CE stages

Draw block diagram of IC 723. Write the functions of IC 723.

Description : Draw block diagram of IC 723. Write the functions of IC 723.

Last Answer : Functions of IC 723 : 1. Series, shunt, switching and floating regulators 2. Basic Low-voltage Regulator (Vo = 2 to 37 volts) 3. Low Voltage High Current Regulator.  ... off is obtained by connecting a small capacitor of 100 pF between frequency compensation and inverting input terminals. 

Draw the symbol, logic expression and truth table of NOR gate.

Description : Draw the symbol, logic expression and truth table of NOR gate.

Last Answer : symbol, logic expression and truth table of NOR gate

Draw the symbol of LED & photodiode.

Description : Draw the symbol of LED & photodiode. 

Last Answer : Symbol of LED & photodiode

Draw O/P characteristics of CB configuration and explain its working.

Description : Draw O/P characteristics of CB configuration and explain its working.

Last Answer : In common base configuration, emitter is the input terminal, collector is the output terminal and base terminal is connected as a common terminal for both input and output. The base-emitter ... In this region, a small collector current flows called leakage current when emitter current is zero.

An AC supply of 230 V is applied to half wave rectifier circuit. A transformer turns ratio is 20 : 1. Find i) Output DC voltage (ii) Peak Inverse Voltage (PIV)

Description : An AC supply of 230 V is applied to half wave rectifier circuit. A transformer turns ratio is 20 : 1. Find i) Output DC voltage (ii) Peak Inverse Voltage (PIV)

Last Answer : Solution:

What is CB, CE and CC configuration ?

Description : What is CB, CE and CC configuration ?

Last Answer : Buffer : A device or a circuit used to isolate two pt'ne circuits or stages. The emitter follows is a example of buffer. Alpha = IC / IE Beta = IC / IB

(i) Discuss ideal and practical voltage source (ii) Compare CB, CC and CE configuration

Description : (i) Discuss ideal and practical voltage source (ii) Compare CB, CC and CE configuration

Last Answer : (i) Discuss ideal and practical voltage source Ideal voltage source The ideal voltage source has a constant voltage across its terminal, irrespective of the current drawn from the source. Ideal Voltage Source have zero ... to reduce. (ii) Compare CB, CC and CE configuration

Compare between CB , CE & CC transistor configuration.

Description : Compare between CB , CE & CC transistor configuration.

Last Answer : Parameter CB CE CC I/P impedance Low Or 50Ω Medium Or 600Ωto 4kΩ High Or 1 MΩ Current Gain Less than or equal to 1 High Highest Voltage Gain Medium Medium Less ... k Ω to 50 k Ω Low Or 50 Ω Phase shift between input and output 0° 360° 0° 

A common-emitter circuit has an input voltage of 0.1 volt, an output voltage of 2.0 volts, an input current of 0.5 milliamps, and an output current of 10 milliamps. What is the power gain? A. 20 B. 40 C. 400 D. 4000

Description : A common-emitter circuit has an input voltage of 0.1 volt, an output voltage of 2.0 volts, an input current of 0.5 milliamps, and an output current of 10 milliamps. What is the power gain? A. 20 B. 40 C. 400 D. 4000

Last Answer : Answer: C

How is the output signal developed in the common-emitter detector?

Description : How is the output signal developed in the common-emitter detector?

Last Answer : By the collector current flow through R4.

Is the base region much thinner or much wider than the collector and the emitter regions?

Description : Is the base region much thinner or much wider than the collector and the emitter regions?

Last Answer : yes its thinnerMost of the free electrons that have entered the base do notrecombine with holes because the base is very thin.

ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into ............... (1) Race condition (2) Saturation (3) Delay (4) High impedance

Description : ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into ............... (1) Race condition (2) Saturation (3) Delay (4) High impedance

Last Answer : Answer: 2  Explanation: Emitter-coupled logic (ECL) is the fastest of all logic families and therefore is used in applications where very high speed is essential. High speeds have become ... configuration, in which they are never driven into saturation and thereby the storage time is eliminated.

Draw the characteristics of tunnel diode, showing operating regions. State two applications of tunnel diode.

Description : Draw the characteristics of tunnel diode, showing operating regions. State two applications of tunnel diode.

Last Answer : Applications: One of the important application of a tunnel diode is in high speed computers where the switching times in the order of nanoseconds or picoseconds are desirable. A tunnel diode can be ... In digital networks. 2. As a high speed switch. 3. As a high frequency oscillator.

For the active mode BJT operation (A) Emitter Base Junction is Forward Biased and Collector

Description : For the active mode BJT operation (A) Emitter Base Junction is Forward Biased and Collector Base Junction is Forward Biased (B) Emitter Base Junction is Reverse Biased and Collector Base Junction ... Biased (D) Emitter Base Junction is Reverse Biased and Collector Base Junction is Forward Biased

Last Answer : For the active mode BJT operation Emitter Base Junction is Forward Biased and Collector Base Junction is Reverse Biased.

Draw full bridge & half bridge configuration with common cathode.

Description : Draw full bridge & half bridge configuration with common cathode.

Last Answer : Half Bridge Configuration: Full Bridge Configuration: 

Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Description : Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Last Answer : Parameter Common Base Common Collector Current gain Low (About 1) High (1+β) Voltage gain High 1  Input impedance  Low High Output impedance High Low

Draw and explain axis configuration as per ISO, for horizontal spindle CNC machines.

Description : Draw and explain axis configuration as per ISO, for horizontal spindle CNC machines.

Last Answer : Axis Configuration for Horizontal Spindle CNC Machines: The first axis to be identified is the Z axis. This is then followed by the X and Y axes respectively. Z Axis and ... are in the directions which advance right-hand screws in the positive X, Y and Z directions respectively.  

If the operating point of an NPN transistor amplifier is selected in saturation region, it is likely to result in A) Thermal runaway of transistor B) Clipping of output in the positive half of the input signal C) Need for high dc collector supply D) Clipping of output in the negative half of the input signal

Description : If the operating point of an NPN transistor amplifier is selected in saturation region, it is likely to result in A) Thermal runaway of transistor B) Clipping of output in the positive half of the ... for high dc collector supply D) Clipping of output in the negative half of the input signal

Last Answer : B) Clipping of output in the positive half of the input signal

An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V.

Description : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is  A) 25 micro-volt B) 50 micro-volt C) 5 Volts D) 10 volts

Last Answer : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is 50 micro-volt

Describe the working principle of photodiode with proper diagram.

Description : Describe the working principle of photodiode with proper diagram.

Last Answer : Diagram of photo diode : Working principle of photo diode :  When photons of energy greater than 1.1 eV hit the diode, electron-hole pairs are created. The intensity of photon ... , the holes move toward the anode and the electrons move toward the cathode, thereby producing photocurrent. 

List the applications of RC oscillator and crystal oscillator.

Description : List the applications of RC oscillator and crystal oscillator.

Last Answer : Applications of RC oscillator :  1) In AF signal generators 2) In radio transmitter & Receivers 3) Sine wave generator.  Applications of Crystal oscillator : 1) Electronic navigation systems 2) Frequency Synthesizers 3) Timing circuits (Clock) with high stability. 4) RADAR systems. 

Describe transistor as a switch with neat sketch.

Description : Describe transistor as a switch with neat sketch.

Last Answer : In Bipolar Transistor as a Switch the biasing of the transistor, either NPN or PNP is arranged to operate the transistor at both sides of the I-V characteristics curves. The areas ... possible and maximum current flowing through the transistor. Therefore the transistor is switched Fully-ON .

Differentiate between positive and negative feedback on the basis of . (i) overall phase shift (ii) voltage gain (iii) stability (iv) applications

Description : Differentiate between positive and negative feedback on the basis of . (i) overall phase shift (ii) voltage gain (iii) stability (iv) applications 

Last Answer : Compare positive feedback and negative feedback on the basis of: (i) Gain (ii) Bandwidth (iii) Phase shift (iv) Stability

Define the term line regulation.

Description : Define the term line regulation. 

Last Answer : Line regulation is the ability of a power supply to maintain a constant output voltage irrespective of any changes in input voltage. 

Suggest the suitable diode type for rectifier circuit.

Description : Suggest the suitable diode type for rectifier circuit. 

Last Answer : Any general purpose diodes 1N4001 to 1N4007 series  Or Silicon diode & Germanium diode 

List configurations of BJT.

Description : List configurations of BJT. 

Last Answer : Configurations of BJT : 1) Common Base (CB) configuration 2) Common Emitter (CE) configuration 3) Common Collector (CC) configuration

Define rectifier and list its types.

Description : Define rectifier and list its types. 

Last Answer : Definition: A rectifier is a circuit that converts AC input voltage into DC output voltage.  Types : 1) Half wave rectifier  2) Center tap full wave rectifier. 3) Bridge Rectifier 

Draw the Internet architecture [TCP/IP architecture] and explain the functionalities of each layer in detail.

Description : Draw the Internet architecture [TCP/IP architecture] and explain the functionalities of each layer in detail.

Last Answer : ∙ NET1, NET2, and so on. combination of hardware (e.g., a network adaptor) and software(e.g., a network device driver). Ethernet or Fiber Distributed Data Interface (FDDI) ... ), and SMTP (Simple Mail Transfer Protocol, or electronic mail), enable interoperation of popular applications.

Draw the OSI Network architecture and explain the functionalities of each layer in detail.

Description : Draw the OSI Network architecture and explain the functionalities of each layer in detail.

Last Answer : Physical layer ∙ Data link layer ∙ Network layer ∙ Transport layer ∙ Session layer ∙ Presentation layer ∙ Application layer

Draw the block diagram of DM transmitter.Explain each block in detail.

Description : Draw the block diagram of DM transmitter.Explain each block in detail.

Last Answer : Block diagram of DM transmitter:-  Explanation:-  Sample and Hold:- The input analog is sampled and converted to PAM signal, which is compared with the output of the DAC. The output of the DAC ... counter is decremented, alogic 0 is transmitted.  (Waveform is optional):- OR

Draw the constructional detail of C type bourdon tube and explain its working.

Description : Draw the constructional detail of C type bourdon tube and explain its working. 

Last Answer : Explanation : The C-shaped Bourdon tube has a hollow, elliptical cross section. It is closed at one end and is connected to the fluid pressure at the other end. When pressure is applied, ... the maximum operating pressure of the system or portion of the system in which the gauge is installed. 

The diagram shown in the illustartion represents a/an _____________. EL-0022 A. magnectic amplifier B. common base amplifier C. common collector amplifier D. common emitter amplifier

Description : The diagram shown in the illustartion represents a/an _____________. EL-0022 A. magnectic amplifier B. common base amplifier C. common collector amplifier D. common emitter amplifier

Last Answer : Answer: D

What is the input current in the common-emitter circuit?

Description : What is the input current in the common-emitter circuit?

Last Answer : Base current (IB).

Which junction of the transistor in the common-emitter detector detects the modulation envelope?

Description : Which junction of the transistor in the common-emitter detector detects the modulation envelope?

Last Answer : Emitter-base junction

The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage

Description : The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage

Last Answer : ANSWER: Y -- COLLECTOR CURRENT

A certain common-emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed.

Description : A certain common-emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed.  a. The circuit will become unstable b. The voltage gain will decrease  c. The voltage gain will increase d. The circuit will become stable

Last Answer : B

If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be

Description :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55  

Last Answer :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98 

In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the

Description : In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: (1) 10 µA (2) 100 µA (3) 1 A (4) 10 A 

Last Answer : In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: 100 µA