#9 18. An has a of 12 mA and a 100 2 WhatPROBLEMS 443FIGURE 8-68A.10. The following parameters are obtained from a certain JFET datasheet: osum=-8 VandInss = 5 mA. Determine the values of Ip for each value of Ves ranging from 0Vio-8 V in 1 Vsteps. Plot the transfer characteristic curve from these data11. For the JFET in Problem 10, what value of Ves is required to set up a drain current of 2.2SMA?12. For a particular JFET, gm0 = 3200 uS. What is g when Vos=-4V, given that-8 V?VGS(off)13. Determine the forward transconductance of a JFET biased at Ves=-2 V. From the datasheet.Vesiert = -7 V and g = 2000 µS at Ves= 0 V. Also determine the forward transfer condact-VGStoff)%3Dance, gfs14. Ap-channel JFET datasheet shows that less= 5 nA at Ves= 10V. Determine the inpot resistance.15. Using Equation 8-1, plot the transfer characteristic curve for a JFET with & =8 mÀ andVostoff)=-5 V. Use at least four points.con 8-3 JFET Biasing16. Show a self-biased n-channel JFET.17. Show a voltage-divider-biased p-channel JFET and a current-source-biased n-chanpel 373T18 An nuchannel self-biased JFET has a drain current of T2 mA and a 100 source resistor Whatis the value of Vas?lue of Rs required for a self-biased JFET to produce aVos of-4 V when (b) of the or decrease?3. the for a and an JFET. the terminals,2. the of an JFET be 0 or negative?(a) Does the depletion region narrow or wideD) Does the resistance of the channel increase or decrease?+VDDFIGURE 8-67(b)(a)5. A JFET has a specified pinch-off voltage of 5 V. When Ves = 0, what is Vps at the point wherethe drain current becomes constant?Section &-2 JFET Characteristics and Parameters6. A certain n-channel JFET is biased such that VGs =-2 V. What is the value of Vesofm if V, isspecified to be 6 V? Is the device on?7. A certain JFET datasheet gives Vastoff) =-8 V and Ipss = 10 mA. When Ves = 0, what is hfor values of Vps above pinch off? Vop = 15 V.8. A certain p-channel JFET has a Vesiofm= 6 V. What is Ip when Ves = 8 V?9. The JFET in Figure 8-68 has a Vasioff) =-4 V. Assume that you increase the supply voltage.VDD, beginning at zero until the ammeter reaches a steady value. What does the voltmeter readat this point?GS(off)

Given Data: VGS(off) = -4 V In the figure the arrow going inside the Drain terminal so it is the n…

VGS(off) =6 V. What is Ip when Ves =8 V? GS 9. The JFET in Figure 8-68 has a Vastoff =-4 V. Assume that you increase the supply voltage. VDD, beginning at zero until the ammeter reaches a steady value. What does the voltmeter reau at this point?

VGS(off) =6 V. What is Ip when Ves =8 V? GS 9. The JFET in Figure 8-68 has a Vastoff =-4 V. Assume that you increase the supply voltage. VDD, beginning at zero until the ammeter reaches a steady value. What does the voltmeter reau at this point?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.

Question

18. An has a of 12 mA and a 100 2 What
PROBLEMS 443
FIGURE 8-68
A.
10. The following parameters are obtained from a certain JFET datasheet: osum=-8 Vand
Inss = 5 mA. Determine the values of Ip for each value of Ves ranging from 0Vio-8 V in 1 V
steps. Plot the transfer characteristic curve from these data
11. For the JFET in Problem 10, what value of Ves is required to set up a drain current of 2.2SMA?
12. For a particular JFET, gm0 = 3200 uS. What is g when Vos=-4V, given that
-8 V?
VGS(off)
13. Determine the forward transconductance of a JFET biased at Ves=-2 V. From the datasheet.
Vesiert = -7 V and g = 2000 µS at Ves= 0 V. Also determine the forward transfer condact-
VGStoff)
%3D
ance, gfs
14. Ap-channel JFET datasheet shows that less= 5 nA at Ves= 10V. Determine the inpot resistance.
15. Using Equation 8-1, plot the transfer characteristic curve for a JFET with & =8 mÀ and
Vostoff)=-5 V. Use at least four points.
con 8-3 JFET Biasing
16. Show a self-biased n-channel JFET.
17. Show a voltage-divider-biased p-channel JFET and a current-source-biased n-chanpel 373T
18 An nuchannel self-biased JFET has a drain current of T2 mA and a 100 source resistor What
is the value of Vas?
lue of Rs required for a self-biased JFET to produce a
Vos of-4 V when

(b) of the or decrease?
3. the for a and an JFET. the terminals,
2. the of an JFET be 0 or negative?
(a) Does the depletion region narrow or wide
D) Does the resistance of the channel increase or decrease?
+VDD
FIGURE 8-67
(b)
(a)
5. A JFET has a specified pinch-off voltage of 5 V. When Ves = 0, what is Vps at the point where
the drain current becomes constant?
Section &-2 JFET Characteristics and Parameters
6. A certain n-channel JFET is biased such that VGs =-2 V. What is the value of Vesofm if V, is
specified to be 6 V? Is the device on?
7. A certain JFET datasheet gives Vastoff) =-8 V and Ipss = 10 mA. When Ves = 0, what is h
for values of Vps above pinch off? Vop = 15 V.
8. A certain p-channel JFET has a Vesiofm= 6 V. What is Ip when Ves = 8 V?
9. The JFET in Figure 8-68 has a Vasioff) =-4 V. Assume that you increase the supply voltage.
VDD, beginning at zero until the ammeter reaches a steady value. What does the voltmeter read
at this point?
GS(off)

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