Problem 2 (10 points A large number of different op amp architectures were identified in class. A table summarizing some of the more popular possible structures is shown below Folded Common Source CascodeRegulated Cascode CascodeRegulatedCurrent Cascode Folded Mirror Differential Input Differential Output Tail Voltage Bias Single-Ended Input Single-Ended Output Tail Current Bias Stage 1 Folded Regulated Cascode Folded Cascode Mirror Cascode Differential Input Differential Output Tail Voltage Bias Single-Ended Input Single-Ended Output Tail Curent Bias Stage2 Internally Compensated Output Compensated p-channel Input n-channel Input a) Give the schematic of a two-stage op amp with a folded cascode first stage,a common source second stage, with differential inputs and single-ended output on the first stage. Use p-channel inputs on the first stage and n-channel inputs on the second stage. Use tail current bias on the first stage and tail voltage bias on the second stage. Use output compensation. Assume the total output capacitance (including any compensation capacitance) is CL b)Give an expression for the dc gain of the amplifier in part a) in terms of the small signal model parameters and in terms of the practical design parameters c Give an expression for the GB of the amplifier in terms of the small signal model parameters and in terms of the practical design parameters Problem 2 (10 points A large number of different op amp architectures were identified in class. A table summarizing some of the more popular possible structures is shown below Folded Common Source CascodeRegulated Cascode CascodeRegulatedCurrent Cascode Folded Mirror Differential Input Differential Output Tail Voltage Bias Single-Ended Input Single-Ended Output Tail Current Bias Stage 1 Folded Regulated Cascode Folded Cascode Mirror Cascode Differential Input Differential Output Tail Voltage Bias Single-Ended Input Single-Ended Output Tail Curent Bias Stage2 Internally Compensated Output Compensated p-channel Input n-channel Input a) Give the schematic of a two-stage op amp with a folded cascode first stage,a common source second stage, with differential inputs and single-ended output on the first stage. Use p-channel inputs on the first stage and n-channel inputs on the second stage. Use tail current bias on the first stage and tail voltage bias on the second stage. Use output compensation. Assume the total output capacitance (including any compensation capacitance) is CL b)Give an expression for the dc gain of the amplifier in part a) in terms of the small signal model parameters and in terms of the practical design parameters c Give an expression for the GB of the amplifier in terms of the small signal model parameters and in terms of the practical design parameters
