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Transcript
Lab1 Common source Amp, the source follower, and common gate Amp Objective: To be familiar with Common source Amp, the source follower, and common gate Amp. Motivation: Single-stage amplifiers are used in virtually every op-amp design. Fig 1 Common source amplifier Fig 2 the source follower Fig 3 Common gate Amp Lab: For EE135, attach your libraries to the tech library AMI 0.60 C5N. For a good tutorial on ac analysis with Spectre, see pp. 12-21 of http://www.ee.ucr.edu/~rlake/EE135/tutorial_1_06.pdf 1 Build the circuits in figs.1-3 in Cadence. Use W=1.5 and L=600n for ALL transistors as shown in Fig. 3. Also, combine the voltage sources on the right into one 5V source as shown in Fig. 3. For each amplifier, calculate and plot the magnitude and phase of the gain as a function of frequency from DC to 2 decades past the -3dB point. For each amplifier, record the low frequency (f << f(-3dB)) gain (including the sign of the gain) and f(-3dB). What to hand in: Turn in screenshots of your circuits. Each circuit should be followed by the plots of the magnitude and phase of its gain and the recorded low frequency gain and f(-3dB).