作者B10413132 (LIN-PO-CHEN)
看板Electronics
标题[问题] 电子学频率响应问题，求救各位大大解答
时间Sun Apr 16 16:59:24 2017
求解11.2题
已知CS组态电路增益与Rd有关，想问各位大大要怎麽求出在3GHz时增益减少的比例?
解答提供的答案为减少2.27倍
http://i.imgur.com/gkxqOSg.jpg
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※ 编辑: B10413132 (101.139.77.195), 04/16/2017 22:43:26
※ 编辑: B10413132 (101.139.77.195), 04/17/2017 00:09:35
1F：推 deathcustom: Av = -gm*RD*/(sCL*RD+1), w_3dB = 1/RDCL 04/17 10:01
2F：→ deathcustom: f_3dB = w_3dB/2pi = 1/(2.25e-9*2pi) = 70MHz 04/17 10:03
3F：→ deathcustom: Attenuation = 20log(3G/70M) = 32.64 dB 04/17 10:04
4F：→ deathcustom: 增益减少32.6dB 04/17 10:04