The circuit in Figure P4.67 is a simplified ac equivalent circuit of a foldedcascode amplifier. The transistor parameters are \(\left|V_{T N}\right|=\left|V_{T P}\right|=0.5 \mathrm{~V}\), \(K_{n}=K_{p}=2 \mathrm{~mA} / \mathrm{V}^{2}\), and \(\lambda_{n}=\lambda_{p}=0.1 \mathrm{~V}^{-1}\). Assume the current source \(2 I_{Q}=200 \mu \mathrm{A}\) is ideal and the resistance looking into the current source \(I_{Q}=100 \mu \mathrm{A}\) is \(50 \mathrm{k} \Omega\). Determine the

(a) small-signal parameters of each transistor,

(b) small-signal voltage gain, and

(c) output resistance \(R_{o}\).

Transcribed Image Text:

Figure P4.67 210= 200 M M R 100