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Hi everyone,
I wanna look for a microphone able to detect shockwave because most of common microphone can't.
It's appreciate available on DIGIKEY.
thanks
The input stage of Active inductor BPF normally is CS, input go to gate of MOSFET ( huge impedance) we need design impedance matching.
Most of paper don't design impedance matching for active inductor BPF, however they also show S21,S11, NF?
why?
1. I expect when out of filter band, signal @ output of filter attenuate. ie 1GHz is frequency out of bandwidth, out put signal expect 1mV for example due to magnitude respose of filter.
2. Yes, I use a voltage short with Vdc=V1, VAC=1 V and sweep Vdc to check the frequency respose. V1 is chosen...
My aim to design active filter using active inductor but I don't see filter characteristic at all at time domain, by putting a sin wave with sin wave , properly DC operating, and amplitude of 10mV for example.
The attached file is schematic & ZIN ( check ZIN to ensure active inductor behave...
When checking AC response of bandpass filter look perfectly, put VAC=1, VDC=V0 ( suitable Bias for operating).
But when I apply transient simulation the output unstable.
what will happen if
1. changing size of Min?
2. Change Ib at buffer how big is it good.
Pls see attached file.
May be my question is not clear,
1. How to simulate frequency response of differiential circuit, for singled end I just put VAC or IDC(Idc=0, Iac=1) to check the output.
2. And how to recognize the buffer work? mean how buffer work>
I'm using cadence-spectre, how to simulate Gain-frequency of differiential active filter as attached file?
And how to recognize the buffer work? I normally use source follower but seemly they use gain stage instead.
thanks,
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