The differential gain circuit below is perfectly symmetric. Assume all transistors are kep n saturation and that γ = 0. a. Draw the equivalent half-circuit. b. Derive an expression for the circuit's small-signal differential gain in terms of the transistor small-signal parameters: gm, ro, etc. c. Derive an expression for the circuit's small-signal output resistance in terms of the transistor small-signal parameters. d. Find the common mode gain and CMRR of the circuit in terms of the transistor small signal parameters if the current source Ibias has an output resistance of Rss.
Image text
The differential gain circuit below is perfectly symmetric. Assume all transistors are kep n saturation and that γ = 0. a. Draw the equivalent half-circuit. b. Derive an expression for the circuit's small-signal differential gain in terms of the transistor small-signal parameters: gm, ro, etc. c. Derive an expression for the circuit's small-signal output resistance in terms of the transistor small-signal parameters. d. Find the common mode gain and CMRR of the circuit in terms of the transistor small signal parameters if the current source Ibias has an output resistance of Rss.
