Pinch off voltage of a J FET is the drain to source voltage above which drain current Remains constant
Description : Define with respect to FET:- (i) Static drain resistance (ii) Dynamic resistance (iii) Trans conductance (iv) Pinch-off voltage
Last Answer : (i) Static drain resistance- It is the ratio of drain source voltage (ΔVDS) to the drain current (ID) at constant gate-source voltage. It can be expressed as, Rd = (VDS)/(ID) at ... of charge carrier and the value of drain current reaches its constant saturation value is called pinch off voltage.
Description : Define pinch off voltage and drain resistance of FET.
Last Answer : 1 . Pinch-off Voltage: It is the value of the drain to source voltage VDS at which the drain current ID reaches its constant saturation value. Any further increase in VDS does not have any ... drain to source voltage to the change in drain current. It is also called AC/dynamic drain resistance.
Description : Draw the drain characteristics of p-channel FET and explain.
Last Answer : Drain characteristics:- As VDS is increased from zero as shown , ID will increased proportionally through the p channel. In this region the channel resistance is constants because the depletion region is ... the depletion layer. (i.e. channel width zero) is called cutoff voltage or VGS(off).
Description : why the bjt is known as current controlled device and fet is known as voltage controlled device ?
Last Answer : Ans- 1. In BJT because of the current the output will vary. 2. Where as in FET by means of Voltage the output is varied.
Description : What is pinch off voltage in JFET?
Last Answer : Pinch off voltage (VP): It is the minimum drain source voltage at which the drain current essentially becomes constant.
Description : construction of P-channel J-FET.
Last Answer : Construction of P-channel J-FET : The construction diagram of P channel junction field effect transistor (JFET) is shown in above figure. It consist of a P type silicon ... enter the semiconductor bar and Source (S) is a terminal through which the electrons leave the semiconductor.
Description : Explain N-channel J-FET with its transfer characteristics.
Last Answer : Working of Channel JFET: Working: 1. The application of negative gate voltage and positive drain voltage with respect to source, reverse biases the gate- source junction of an N-channel JFET. 2. When a ... symbol VP or VGS(OFF) . The value of VP is negative for N-channel JFET.
Description : Differentiate between N-channel and P-channel J-FET.
Last Answer : N-Channel JFET P-Channel JFET 1.The current conduction takes place due to electrons 1.The current conduction takes place due to holes. 2.Its switching speed and cut off ... It is most widely used in circuit applications 5.It is comparatively less used in circuit applications
Description : An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance
Last Answer : An FET is a better chopper than a BJT because it has lower offset voltage
Last Answer : A FET is essentially a Voltage driven device
Last Answer : A FET is a Bi-polar transistor
Last Answer : In an FET One junction has reverse bias on both sides of the junction.
Description : What are the advantages of FET?
Last Answer : FET is a constant current device which is controlled by voltage. By varying the input voltage we can control the output current. There are basically two types of FET one is MOSFET and second is JFET . ... as compare to BJT. These are some advantages of FET (Field Effect Transistor).
Description : In a JFET drain current is maximum when VGS is (a) zero (b) negative (c) positive (d) equal to Vp
Last Answer : A
Description : An FET has a gate source bias of 2 V. The ac input signal is ± 1.2 V. The class of operation is A) A B) B C) C D) AB
Last Answer : D) AB
Description : Sketch circuit diagram of common source FET Amplifier. State working principle of it.
Last Answer : Working: - * When small a.c. signal is applied to the gate, it produces variation in the gate to source voltage. This produces variation in the drain current. As the gate to source ... and we get amplification. Thus the AC output voltage VDS is 180º out of phase with AC input voltage.
Description : In a transistor, the conventional current flows from base to emitter. The transistor is (a) NPN (b) PNP (c) FET (d) None of these
Last Answer : (a) NPN
Description : How should I prune my kolanchoe plant? Do I just pinch off the dead flowers, or do I have to cut the stem below the first leaf from the top?
Last Answer : answer:
Description : When kolanchoe flowers die, do I pinch them off or cut the plant back so far?
Last Answer : It's kalanchoe...a dessert succulent.
Description : Should I pinch suckers off my tomato plants even though they've gotten big and now have blossoms on them?
Last Answer : The only disadvantage of suckers is that the more you have, the less the tomatoes will weigh. The more suckers you have, the more tomatoes you will harvest, although they will be smaller. Your choice.
Description : Do I pinch off yellow blooms from tomato plants?
Last Answer : No, no,no-the yellow flower is what develops into the tomato.
Description : Do you pinch off flowers of coleus?
Last Answer : Your guess is correct. Pinch the flower stem back to keep the plant beautiful.
Description : When planting snapdragons should I pinch the blooms off?
Last Answer : I planted them with the flowers intact.....when the blooms died I pinched them off .
Description : The device in figure 'B' shown in the illustration will conduct when the ____________. EL-0067 A. base-emitter is forward biased and the collector-base is reverse biased B. anode-cathode is forward ... is reversed biased D. terminal 1-2 is forward biased and the emitter-terminal 1 is reverse biased
Last Answer : Answer: B
Description : The leads of the device in figure 'B' shown in the illustration are named _________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate
Last Answer : Answer: A
Description : Leads on the device in figure 'B' shown in the illustration are named ____________. EL-0067 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate
Last Answer : Answer: D
Description : The leads of the device in figure 'A' shown in the illustration are named the _______________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate
Last Answer : Answer: C
Description : The source and drain of an N-channel JFET are made of what type of material?
Last Answer : N-type material.
Description : While biasing JFET if drain and source are interchanged, then (A) device will work normally (B) device will get damaged (C) device will work but value of drain current will affected (D) device will not operate at all
Last Answer : B
Description : What is the full form of FET ?
Last Answer : The full name of FET is Field effect Transistor
Description : my adopted son has adhd and is Bipolar mixed and I have had him in and out of physc wards since he was 12, now he is 16,and failing 9th grade and apparently doesnt care.talking doesnt work taking things away ie, tv,phone privaleges,etc , Im also fet up ?
Last Answer : Bipolar disorder is a very serious MEDICAL condition, and cannot be treated by taking away phone and TV privileges. Your son is in serious need of help; seek out a well-regarded specialist A.S.A.P.
Description : Why is input impedance of the FET very high?
Last Answer : BECAUSE its input circuit (gate to source) is reverse biased and input gate current is very small.
Description : Applying a reverse bias to the gate of an FET has what effect?
Last Answer : Source-to-drain resistance increases.
Description : What is the key to FET operation?
Last Answer : Effective cross-sectional area of the channel.
Description : The base of a transistor serves a purpose similar to what element of the FET
Last Answer : Gate.
Description : The FET and the vacuum tube have what in common?
Last Answer : Voltage controls conduction.
Description : What is one of the primary advantages of the FET when compared to the bipolar transistor?
Last Answer : High input impedance.
Description : State the classifications of FET devices.
Last Answer : FET is classified as 1. Junction Field Effect Transistor (JFET) 2. Metal oxide semiconductor family (MOS).
Description : A semiconductor device made up of a single p-n Junction is called a: w) transistor x) diode y) Fet z) integrated circuit
Last Answer : ANSWER: X -- DIODE
Description : State any two applications of FET.
Last Answer : Applications of FET : As input amplifiers in oscilloscopes, electronic voltmeters and other measuring and testing equipment because high input impedance reduces loading effect to the minimum. As Constant ... Used as Analog switch. As a Voltage Variable Resistor (VVR) in operational amplifiers.
Description : State and explain the working principle of FET amplifier and list its applications.
Last Answer : Operation of FET amplifier: When small a.c. signal is applied to the gate, it produces variation in the gate to source voltage. This results in variation in the drain current. As ... input voltage. Application: Buffer amplifier Low noise amplifier Cascade amplifier Chopper amplifier
Description : Comparison of BJT and FET
Last Answer : FET BJT It is unipolar device i.e. current in the device is carried either by electrons or holes It is bipolar device i.e. current in the device is carried either by both ... is comparatively more noisy. It is relatively immune to radiation. It is susceptible to radiation
Description : State the application of FET
Last Answer : Applications of FET : * As input amplifiers in oscilloscopes, electronic voltmeters and other measuring and testing equipment because high input impedance reduces loading effect to the minimum. * As Constant ... Used as Analog switch. * As a Voltage Variable Resistor (VVR) in operational amplifiers.
Description : Compare BJT with FET
Last Answer : FET BJT It is unipolar device i.e. current in the device is carried either by electrons or holes It is bipolar device i.e. current in the device is carried either by ... from minority- carrier storage effects & therefore has lower switching speeds & cut-off frequencies.
Description : Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
Last Answer : Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.
Description : List different types of FET.
Last Answer : Types of FETs: 1. Junction FET (JFET) i. N-Channel JFET ii. P-Channel JFET 2. MOSFET i. E-MOSFET ii. D-MOSFET
Description : The gain of an FET amplifier can be changed by changing: (1) rm (2) gm (3) Rd (4) None of these
Last Answer : The gain of an FET amplifier can be changed by changing: gm
Description : A FET is preferred over an ordinary transistor because it 1. Permits high degree of isolation between input & output circuits 2. Has low noise level 3. Has very high power gain 4. Has all the above properties
Last Answer : A FET is preferred over an ordinary transistor because it Has all the above properties
Description : What is the difference between BJT and FET?
Last Answer : BJT is a current opperated transistor while FET is a field opperated transistor.
Description : Is the input impedance of MOSFET more than BJT and FET?
Last Answer : Yes, the input impedance of MOSFET more than BJT and FET.