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Unformatted text preview: EE40 Summer 2011 Neel Shah Homework 4 Due 7/25/2011 Problem 1. A First-Order Band-Pass Filter In lecture we noted that RC filter transfer functions cant be combined just by chaining the filters in series, because the circuit elements from each filter interact with each other and produce higher order terms. However if we separate the filters with an op-amp buffer circuit, we can produce an ideal band pass filter by combining an RC low-pass and an RC high-pass circuit. a) Lets say we put the high-pass filter before the follower and the low-pass filter after the follower. What should components g G g be (i.e. resistors or capacitors) to implement such a design? b) Should the resistor in the high-pass filter be large ( 1) or small ( 10 ) ? What about the resistor in the low-pass filter? Think about where the power in the circuit should go and choose accordingly. Provide a brief explanation for why you chose what you did....
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- Summer '08