#### Mr.Doyle

##### Newbie level 5

(a) Design the circuit shown below such that IDQ1 = 1mA, IDQ2 = 2mA, VDSQ1 = 4V, and VSDQ2 = 5V. The transistor parameters in the circuit in Fig. are: Kn1 = 0.1mA/V2, Kp2 = 1.0mA/V2, VTN1 = +2V, VTD2 = -2V, and λ1 = λ2 = 0. The circuit parameters are: VDD = 10V, RS1=4kΩ and Rin = 200kΩ. Calculate the small-signal voltage gain Av = vo/vi. Determine the maximum symmetrical swing in the output voltage. Assume the input is sinusoidal with amplitude 10mV and frequency 100kHz and all capacitors are 1uF.

(b) If a load of 1kΩ is connected at vo, what would be the new gain. Redesign the amplifier such that its gain will be almost independent of the load value.

and this is the circuit :

Thanks