[SI-LIST] Re: op-amp compensation capacitor in digital cmos process
- From: Bill.Cohen@xxxxxxxxxxxxxxxx
- To: mike_bihan@xxxxxxxxxxxx
- Date: Tue, 15 Jul 2003 14:48:35 -0400
Han,
It may not be a great idea but I compensate all my opamps with MOS gate=
capacitors. Just make sure the device is in saturation otherwise you wi=
ll
get too much series resistance to the thin oxide device. If it is a rai=
l to
rail opamp you may need to used Both NMOS and PMOS devices to keep at l=
east
one device active depending on the common mode. Also, you will only be =
able
to use the device in the well if you need a compensating device with on=
e
end not tied to the power supply.
Bill Cohen
Toshiba America
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Bi Han =
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amp compensation capacitor in digital cmos =20
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mike_bihan =
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hi, experts:
I am on a project designing high speed limiter in digital cmos process.=
I
need to design some op-amp as controlling circuits.
So, I need capacitor to compensate them to stable. But, in my digital c=
mos
process(1p6m), there will be no MIM/PIP capacitor, so I can not compens=
ate
the op-amp!!
Any people have good idea?
Thanks, Han
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