Q4: Calculate the voltage gain, current gain, output voltage, input impedance, and output impedance for a cascade amplifier.
Given values:
- Supply voltage (Vcc) = 24V
- Input resistance (Rin) = 10 kOhm
- Output resistance (Rout) = 220 kOhm
- Transconductance (gm) = 200 mS
- Drain current (ID) = 6 mA
- Threshold voltage (VGS(TH)) = 3V
- Output conductance (Gout) = 20 uS
- Load resistance (RL) = 12 kOhm
To calculate the voltage gain (Av), we can use the formula:
Av = -gm * RL
To calculate the current gain (Ai), we can use the formula:
Ai = gm * RL
To calculate the output voltage (Vo), we can use the formula:
Vo = -gm * RL * ID
To calculate the input impedance (Zin), we can use the formula:
Zin = Rin
To calculate the output impedance (Zout), we can use the formula:
Zout = Rout || (1/gm + RL)
Given values:
- Capacitance (C) = 10 uF
- Resistance (R) = 60 kOhm
To calculate the time constant (Ï„), we can use the formula:
Ï„ = R * C