example - Project 101 Cascoded Amplifier Characteristics...

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Project 101: Cascoded Amplifier Characteristics George Orwell and Dr. Seuss EECE ???, Binghamton University [email protected], [email protected] Abstract This project examined various characteristics of a pFET input, cascaded, wide-range operational transconductance amplifier. The open-loop frequency / phase response and the unity gain DC output were measured and then analyzed in MATLAB. I. Amplifier Topology The operational transconductance amplifier (OTA) studied in the project is a pFET input, cascoded, wide-range topology, as seen in Fig. 1. The bias voltage, V b , was set to 0.5 V to achieve a tail current of 100 nA. Accordingly, the cascode voltages were calculated and biased such that V cp = 4.3 V, and V cn = .6 V. The W/L for all nFETs is 2.4 μm / 1.2 μm. The W/L for all pFETs is 7.2 μm / 1.2 μm, except for the input pair, which was 28.8 μm / 0.6 μm. Fig. 1.
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example - Project 101 Cascoded Amplifier Characteristics...

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