ps2_2011

# ps2_2011 - ECE2c Problem set 2 Transistor Biasing V dd a...

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1 ECE2c Problem set # 2 Transistor Biasing: Vdd Rg2 Rg1 Rd a) The MOSFET has a +0.3 Volt threshold voltage and g ox sat W C v =1.5 mA/V (assume velocity-limited characteristics, i.e. ) 1 )( ( ds th gs g ox sat d V V V W C v I ) , where we will assume 1 V 0 Rg1 is 1 MOhms. Vdd is 1.0 Volts. lambda=0 We would like to bias the MOSFET at 0.1 mA drain current and 0.6 volts between drain and source. Please find the required values of Rg2 and Rd. Vdd Rg2 Rg1 Rd b) Bias stability of the circuit of problem 1(a). First , keeping the same values for Rg1, Rg2, and Rd you found above, compute the drain current and the drain voltage if g ox sat W C v is increased to 10%. Second , using the original value g ox sat W C v , and keeping the same values for Rg1, Rg2, and Rd you found in 1(a), compute the drain current and the drain voltage if the power supply voltage is increased 10%. Vdd

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ps2_2011 - ECE2c Problem set 2 Transistor Biasing V dd a...

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