Q1 Draw the voltage transfer characteristics VTC - for an NMOS transistor M1 having the drain (D) connected to a DC bias voltage VDD through a resistor RD, the gate (G) connected to a voltage source vgs and the source (S) connected to the ground, as shown in Figure 1. In which region of the VTC is it better to bias M1 to operate it as voltage amplifier? Justify your choice. (а) (b) Draw the small signal equivalent circuit model valid in the mid-band frequency range for the circuit shown in Figure 1. State the validity of approximations. Design the circuit Figure 1 to operate as a common source amplifier with a voltage gain of | Gv| = 10 on the hypothesis that M1 is properly biased in the right region of operation and has a transconductance gm = 2.5 mS and output resistance ro = 80 kN. In the small signal equivalent circuit of the amplifier the source is shorted to the ground and the gate is connected to ground through a resistor RG. State any assumptions and show the calculation. (c) VDD Rp VG = VIN D O VD=Vout M1 VGS Vss=0 V Figure 1

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Analog to Digital Converters

The analog-to-digital converter (ADC) allows circuits controlled by microprocessors, Arduinos, Raspberry Pi, and various reasonable digital circuits to be connected to the real world. In the real world, analog signals have a continuous stream of information from a variety of sources and sensors capable of measuring sound, light, temperature, or movement, in addition to the many digital systems that interact with their environment by measuring analog signals from those transducers.