+ 20 V 910 kn 2.2 kN 300 N Ci Vout RL +1 V:. in 110 kΩ) 510 N
Qustion 3, ANALISIS AC
The following amplifier (consider the case with a load RL ) consists of a n channel JFET. In the amplifier the value of the source DC (+VDD= 20V) and of all the resistors (shown in the schematic) and capacitors (C1=C2= 20 uf) is known. At the same time, the JFET has the following specifications: IDSS = 10 mA and VP= -3.5 V.The output resistance of the JFET is rd= infinity Ω (INFITY OHM).
AC analysis:
The input signal Vs is a small sinusoidal signal, at the same time it oscillates at a medium frequency, in such a way that the response is not affected by the capacitances. Get the circuit in small signal and do all the necessary procedure / demonstration. To determine:
A) The transconductance gm at the point of operation.
B) The small signal equivalent circuit drawn conveniently.
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