3. The following figure shows the circuit design scheme based on integrated analog filter chip UAF42, in which each resi

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3 The Following Figure Shows The Circuit Design Scheme Based On Integrated Analog Filter Chip Uaf42 In Which Each Resi 1 (73.61 KiB) Viewed 28 times

3. The following figure shows the circuit design scheme based on integrated analog filter chip UAF42, in which each resistor Rı-R4 in UAF42 is 50K, and each capacitor C1-C2 is 1000p: a) Please derive the filter circuit transfer function H(s), and give the derivation process; b) What function does the circuit achieve? What are the functions of external resistors RF, Rz, Rzi and RQ? c) If the filter circuit is used as the analog filter circuit of an ECG testing instrument, please give the typical values of the above external resistors and explain your reasoning. Note: You may refer to the UAF42 datasheet, understand its basic functions and performance parameters. R2 w RE RE w High-pass ww Low-pass Out Rz R22 w 13 14 Out Band-pass Out R. 50k w c 1000pF HE R2 50k? w CM 1000pF Lovour R SOKΩ w R 50k w 2 UAF42 w4 Ra 10 11 to of