h15_hw4 - EE214 Winter 04/05 B. Murmann Handout #15 Page 1...

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EE214 Winter 04/05 Handout #15 B. Murmann Page 1 of 3 HOMEWORK #4 (Due: Monday, October 25, 2004, noon PT) 1. Self-loading design problem. Consider the wideband pre-amplifier shown below. In this problem, we will investigate how to efficiently incorporate the effect of “unknown” self- loading into the g m /I D design methodology. Design specifications: L=0.5 µ m, V ic =1.5V, A vo =3, C L =100fF, f -3dB,spec =300MHz, minimize I TAIL . Source and bulk are tied together. (Note: In this problem, we will ignore the well-to-substrate capacitance of M2a,b for simplicity. In practice, you would have to include this parasitic load component manually.) a) Based on input signal swing considerations, you decide to operate the differential pair at g m /I D =10V -1 . Calculate g m /I D of M2a and M2b. b) In order to calculate the required transconductance and device widths, it would be necessary to know the total load capacitance of the amplifier. In this design, the load consists of two components: (1) C L
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h15_hw4 - EE214 Winter 04/05 B. Murmann Handout #15 Page 1...

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