The circuit belów represents an amplifier based on a JFET transistor. The characteristics of this JFET transistor are: Saturation current: Ipss= 10 mA Pinch-off voltage: Va(ofn= -4 V VpD= 20V, Ves= -2,2v, R1= 240M2, R2= 47MQ, RD= 3k2, R;= 1.1kN, R1= 4.7k2. a) Calculate the Q point of the transistor Ino et VDsQ b) Calculate the transconductance gm of the transistor. c) Draw the equivalent DC and AC circuits of the amplifier. VDD Rp R Vout Vin Key Formulas: Ves Ip = Ipss 1 - JFET/D-MOSFET transfer characteristic VGs Vasto"). &m = 8mo 1 - Transconductance 21 pss gmo Transconductance at Vas = 0

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The circuit below represents an amplifier based on a JFET transistor.
The characteristics of this JFET transistor are:
Saturation current: Ipss= 10 mA
Pinch-off voltage: Vas(ofm= -4 V
VDD= 20V, Ves= -2,2V, R1= 240M2, R2= 47MO, RD= 3KSN, R= 1.1k2, RL= 4.7k.
a) Calculate the Q point of the transistor InQ et VDsQ
b) Calculate the transconductance gm of the transistor.
c) Draw the equivalent DC and AC circuits of the amplifier.
VDD
Rp
R
C:
Vout
R:
Vin
Key Formulas:
VGs
Ip = Ipss 1 -
JFET/D-MOSFET transfer characteristic
Vcs
&m = 8mo 1
Transconductance
2/pss
gmo =
Transconductance at VGs = 0
Ip = K(Vcs
E-MOSFET transfer characteristic
Transcribed Image Text:The circuit below represents an amplifier based on a JFET transistor. The characteristics of this JFET transistor are: Saturation current: Ipss= 10 mA Pinch-off voltage: Vas(ofm= -4 V VDD= 20V, Ves= -2,2V, R1= 240M2, R2= 47MO, RD= 3KSN, R= 1.1k2, RL= 4.7k. a) Calculate the Q point of the transistor InQ et VDsQ b) Calculate the transconductance gm of the transistor. c) Draw the equivalent DC and AC circuits of the amplifier. VDD Rp R C: Vout R: Vin Key Formulas: VGs Ip = Ipss 1 - JFET/D-MOSFET transfer characteristic Vcs &m = 8mo 1 Transconductance 2/pss gmo = Transconductance at VGs = 0 Ip = K(Vcs E-MOSFET transfer characteristic
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