What is the purpose of having input and output capacitors in three terminal IC regulators?

1 Answer

Answer :

A capacitor connected between the input terminal and ground cancels the inductive effects due to long distribution leads. The output capacitor improves the transient response.

Related questions

Description : Give some examples of monolithic IC voltage regulators

Last Answer : 78XX series fixed output, positive voltage regulators 79XX series fixed output, negative voltage regulators 723 general purpose regulator.

Description : What are the advantages of IC voltage regulators?

Last Answer : *low cost *high reliability *reduction in size *excellent performance

Description : Indicate the false statement. Noise figure is defined as A. the ratio of the S/N power supplied at the input terminal of a receiver or amplifier to the S/N power supplied to the output or ... under test, both working at the same temperature over the same bandwidth and fed from the same source

Last Answer : C. an unwanted form of energy tending to interfere with the proper and easy reception and reproduction of wanted signals

Description : Register is a 1) Set of capacitors used to register input instructions in a digital computer 2) Set of paper tapes and cards put in a file 3) Temporary storage unit within the CPU having dedicated or general purpose use 4) part of the auxiliary memory

Last Answer : 3) Temporary storage unit within the CPU having dedicated or general purpose use

Description : The input terminal impedance at the center of a folded dipole antenna is A. 72 Ω B. 300 Ω C. 50 Ω D. 73 Ω

Last Answer : B. 300 Ω

Description : What is the input terminal impedance at the center if a folded dipole antenna? A. 300 ohms B. 72 ohms C. 50 ohms D. 450 ohms

Last Answer : A. 300 ohms

Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal

Last Answer : C. ground

Description : What is the advantage of monolithic switching regulators?

Last Answer : *Greater efficiency is achieved as the power transistor is made to operate as low impedance switch.Power transmitted across the transistor is in discrete pulses rather than as a steady current flow. * ... frequency can be increased so as to reduce the size and weight of the inductors and capacitors

Description : Give the drawbacks of linear regulators:

Last Answer : *The input step down transformer is bulky and expensive because of low line frequency.  *Because of low line frequency,large values of filter capacitors are required to decrease the ripple.  * ... reduced due to the continous power dissipation by the transistor as it operates in the linear region

Description : Give the classification of voltage regulators

Last Answer : *Series / Linear regulators  *Switching regulators.

Description : The primary purpose of the data modem is to A. interface analog terminal equipment to analog communications channel B. interface digital terminal equipment to analog communications ... to digital communications channel D. interface digital terminal equipment to digital communications channel

Last Answer : B. interface digital terminal equipment to analog communications channel

Description : What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. ... -static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring

Last Answer : A. Apply shielding and filtering where necessary

Description : What are the two common methods for obtaining integrated capacitors?

Last Answer : • Monolithic junction capacitor • Thin-flim capacitor

Description : The first stage of a two-stage amplifier has a voltage gain of 10, a 600 Ω input resistor, a 1600Ω equivalent noise resistance and 27kΩ output resistor. For the second stage, these values are 25, 81kΩ, 19kΩ, and 1MΩ, ... this two stage amplifier. A. 2,518 kΩ B. 2,518 Ω C. 251.8 Ω D. 12,518 Ω

Last Answer : B. 2,518 Ω

Description : A coaxial cable has 7dB of reflected power when the input is 5 watts. What is the output of the transmission line? A. 5 watts B. 2.5 watts C. 1.25 watts D. 1 watt

Last Answer : D. 1 watt

Description : The outer conductor of a coaxial transmission line is always grounded at the A. Input only B. Input and output C. Output only D. Point of high SWR

Last Answer : B. Input and output

Description : Characteristics impedance of a transmission line is the impedance measured at the ___________ when its length is infinite. A. input B. shorted end of the line C. output D. midsection

Last Answer : A. input

Description : What is an opto-coupler IC?

Last Answer : Opto-coupler IC is a combined package of a photo-emitting device and a photosensing device.Examples for opto-coupler circuit : LED and a photo diode, LED and photo transistor, LED and Darlington. Examples for opto-coupler IC : MCT 2F , MCT 2E .

Description : What is a compander IC? Give some examples.

Last Answer : The term companding means compressing and expanding.In a communication system, the audio signal is compressed in the transmitter and expanded in the receiver. Examples : LM 2704- LM 2707 ; NE 570/571.

Description : Why IC 741 is not used for high frequency applications?

Last Answer : IC741 has a low slew rate because of the predominance of capacitance present in the circuit at higher frequencies. As frequency increases the output gets distorted due to limited slew rate. 

Description : What is the use of buried n+ layer in monolithic IC transistor?

Last Answer : The buried n+ layer provides a low resistance path in the active collector region for the flow of current

Description : An input /output device at which data enters or leaves a computer system is A) Keyboard B) Terminal C) Printer D) Plotter

Last Answer : Answer : B

Description : In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal ... 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC

Last Answer : Answer: C

Description : In the illustration, the component VR1 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC

Last Answer : Answer: A

Description : In the illustration, the component VR1 on the A1A1 PCB is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply B. a variable resistor diode to control the output to terminal 9 that controls ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC

Last Answer : Answer: C

Description : Terminal is a 1) device used to give supply to a computer 2) Point at which data may leave or enter the computer 3) point where wires are interconnected 4) an input/output device

Last Answer : 2) Point at which data may leave or enter the computer

Description : An input /output device at which data enters or leaves a computer system is a. Keyboard b. Terminal c. Printer d. Plotter

Last Answer : b. Terminal

Description : An input /output device at which data enters or leaves a computer system is a. Keyboard b. Terminal c. Printer d. Plotter

Last Answer : b. Terminal

Description : An input /output device at which data enters or leaves a computer system is a. Keyboard b. Terminal c. Printer d. Plotter

Last Answer : b. Terminal

Description : One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency opereation and RF amplifier stage orstages that develop the ... to develop a good frequency stability. A. Goldsmith B. MOPA C. Alexanderson D. Hartley

Last Answer : B. MOPA

Description : ECE Board Exam March 1996 What is the purpose of a beat frequency oscillator (BFO)? A. Aid in the reception of weak voice-modulated signals B. Generates a signal, whose frequency is the ... reception D. Generates an output, whose frequency differs from that of the intermediate frequency by 1 kHz

Last Answer : C. Generates a 1kHz note for Morse code reception

Description : Equalization of the power factors of two alternators operating in parallel is accomplished _____________. A. manually, by adjusting the governor controls B. automatically, by automatic voltage regulators ... the output of current transformers D. automatically, by the designed action of the governors

Last Answer : Answer: B

Description : The noise output of a resistor is amplified by a noiseless amplifier having a gain of 60 and a bandwidth of 20 kHz. A meter connected at the output of the amplifier reads 1mV RMS. If the bandwidth of the amplifier is reduced to ... does the meter read now? A. 0.5 mV B. 0.5 µV C. 5.0 mV D. 5.0 µV

Last Answer : A. 0.5 mV

Description : Which of the following is not referred to as data terminal equipment? A. Telephone set B. Printers C. Modem D. Computer

Last Answer : C. Modem

Description : Refers to a continuous tone generated in a local exchange terminal through a combination of two frequencies 350 Hz, and 440 Hz. A. Busy tone B. Call waiting tone C. Dial tone D. Standard tone

Last Answer : B. Call waiting tone

Description : These are used to connect non-ISDN equipment ot ISDN line. A. Digipeaters B. Terminal adapters C. Local repeaters D. Terminal repeaters

Last Answer : B. Terminal adapters

Description : A microwave link between the earth station and the down-town terminal. A. STL B. Uplink C. Downlink D. Terrestrial link

Last Answer : D. Terrestrial link

Description : Modem is referred to as ______. A. Universal asynchronous Rx/Tx B. Data communication equipment C. Universal synchronous Rx/Tx D. Data terminal equipment

Last Answer : B. Data communication equipment

Description : The line control unit (LCU) operates on the data digital form. A. Data communications equipment (DCE) B. UART C. Modem D. Data terminal equipment (DTE)

Last Answer : D. Data terminal equipment (DTE)

Description : ___________ is a device in data transmission to interface data terminal equipment to an analogue transmission line. A. RS 232 B. Connector C. Modem D. RJ-11 plug

Last Answer : C. Modem

Description : What happens when the common terminal of V+ and V- sources is not grounded?

Last Answer : If the common point of the two supplies is not grounded, twice the supply voltage will get applied and it may damage the op-amp

Description : Capacitors are used on the output of the power supply in today's consoles to _____________. A. filter out 'ripple' B. prevent overloads C. act as a permanent load D. decrease the average value of the output voltage

Last Answer : Answer: A

Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?

Last Answer : In parallel.

Description : what will be the capacitance if three capacitors connected in parallel each having value of 0.5 micro Farad ?

Last Answer : the total capacitace when connected in parallel Tc=total capacitor c1=c2=c3=0.5uf Tc=c1+c2+c3 Tc=1.5uf

Description : IC which has quad 2 input AND gates   (A) 7411 (B) 7404 (C)7400 (D) 7408

Last Answer : IC which has quad 2 input AND gates 7408

Description : What is the purpose of having a low pass filter in PLL?

Last Answer : *It removes the high frequency components and noise. *Controls the dynamic characteristics of the PLL such as capture range, lock-in range,band-width and transient response. *The charge on the filter capacitor gives a short- time memory to the PLL

Description : Supercharging of an IC engine is done so that the A. thermal efficiency increases B. power output increases C. speed of the engine increases D. power output decreases

Last Answer : ANSWER : B

Description : Sketch pin configuration of IC 723. State functions of each pin. Sketch circuit diagram for obtaining 6V output d.c. regulated voltage using IC 723.

Last Answer : 1) Pin configuration of IC 723 :  2) Functions of each pin:-  V+ and V-: These are the supply voltage terminals of the IC. V+ is the positive terminal and V- is the negative terminal.  Non ... Expression Vout = Vref * (R2 / R1+R2)  Assume any value of R2, R1 can be calculated.