D *10.21 In a CS amplifier, the resistance of the signal source Rsig = 100 kΩ, amplifier input resistance (which is due to the biasing network) Rin = 100 kΩ, Cgs = 1 pF, Cgd = 0.2 pF, gm = 5 mA/V, ro = 25 kΩ, and RL = 20 kΩ. Determine the expected 3-dB cutoff frequency fH and the midband gain. In evaluating ways to double fH, a designer considers the alternatives of changing either RL or Rin. To raise fH as described, what separate change in each would be required? What midband voltage gain results in each case?

D *10.21 In a CS amplifier, the resistance of the signal source Rsig = 100 kΩ, amplifier input resistance (which is due to the biasing network) Rin = 100 kΩ, Cgs = 1 pF, Cgd = 0.2 pF, gm = 5 mA/V, ro = 25 kΩ, and RL = 20 kΩ. Determine the expected 3-dB cutoff frequency fH and the midband gain. In evaluating ways to double fH, a designer considers the alternatives of changing either RL or Rin. To raise fH as described, what separate change in each would be required? What midband voltage gain results in each case?

D *10.21 In a CS amplifier, the resistance of the signal source Rsig = 100 kΩ, amplifier input resistance (which is due to the biasing network) Rin = 100 kΩ, Cgs = 1 pF, Cgd = 0.2 pF, gm = 5 mA/V, ro = 25 kΩ, and RL = 20 kΩ. Determine the expected 3-dB cutoff frequency fH and the midband gain. In evaluating ways to double fH, a designer considers the alternatives of changing either RL or Rin. To raise fH as described, what separate change in each would be required? What midband voltage gain results in each case?

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