G. For the given circuit What could be done to increase Ay for the circuit? and determine the new value of Av.

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G.
For the given circuit
What could be done to increase Ay for the circuit?
and determine the new value of Ay.
Transcribed Image Text:G. For the given circuit What could be done to increase Ay for the circuit? and determine the new value of Ay.
Given circuit
The maximum values are determined as,
Vps = 25 V
VGs = 25 V
VGS-OFF = -4 V
Small Signal JFET Amplifier
Self-biased Circuit
VDD 20V
Ipss = 30 mA
Design Specifications:
Av = 9 (gain ratio)
Id = 8mA
3RD
A minimum value of transconductance will be
C5
Vout
8s = 10000 umhos
Drain
Q2
J309
2.2µF
C4
V
A,
=
Gate
Vin
2.2µF
Source
Ins Ro
SRG
The equation for drain current is obtained as,
ERS
20
VDp - IpsRp – Vps - IpsRs = 0
Voo-Vrs
Ips = Rok,
0.8-RD
Ips = V 5
Applying KVL in drain to source circuit -:
info that may be useful
on the right
VDD - IDRD – Vps - IşRs = 0------ 1)
Putting value in equation -1) with the help of table
(Rp + Rs) =
Vrn - Vos
20 – 10 = .25 K2 ---- 2)
Applying KVL in gate to source circuit -:
-VGs - 1sRs = 0
Ip =
3)
Rs =
4)
With the help of the table putting minimum value in equation -4)
Rs -
- - 250 2----5)
Putting equation -5) in equation -1)
Rp = 1.25 KN – 2502
Transcribed Image Text:Given circuit The maximum values are determined as, Vps = 25 V VGs = 25 V VGS-OFF = -4 V Small Signal JFET Amplifier Self-biased Circuit VDD 20V Ipss = 30 mA Design Specifications: Av = 9 (gain ratio) Id = 8mA 3RD A minimum value of transconductance will be C5 Vout 8s = 10000 umhos Drain Q2 J309 2.2µF C4 V A, = Gate Vin 2.2µF Source Ins Ro SRG The equation for drain current is obtained as, ERS 20 VDp - IpsRp – Vps - IpsRs = 0 Voo-Vrs Ips = Rok, 0.8-RD Ips = V 5 Applying KVL in drain to source circuit -: info that may be useful on the right VDD - IDRD – Vps - IşRs = 0------ 1) Putting value in equation -1) with the help of table (Rp + Rs) = Vrn - Vos 20 – 10 = .25 K2 ---- 2) Applying KVL in gate to source circuit -: -VGs - 1sRs = 0 Ip = 3) Rs = 4) With the help of the table putting minimum value in equation -4) Rs - - - 250 2----5) Putting equation -5) in equation -1) Rp = 1.25 KN – 2502
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