Article View: comp.lsi
Article #1321A Question On Biasing Circuits
From: Alexander The Great Sherstinsky
Date: Sat, 03 Mar 1990 18:45
Date: Sat, 03 Mar 1990 18:45
27 lines
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1670 bytes
Vi C
----||----*-- Vo
|
/
\ R
/
\
|
GND
I need help in finding the right circuit for my thesis. Basically,
I am designing a highpass RC filter whose break point frequency is as
small as I can get. C is fixed at 1pF, so the objective is to make R big.
Thus, what I need is a biasing network that will keep the node Vo
at 2.5 V DC, while making the R huge. The supply voltages are 0 V and 5 V,
which is why I want an approximately 2.5 V DC level. It looks like what
I want is a voltage source with a huge source impedance (1 Gohm would
be nice). It doesn't have to be linear, the whole circuit doesn't have
to be linear.
Thanks for help,
Alex
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+-------------------------------+------+-----------------+---------------------+
|Alexander The Great Sherstinsky|me |shers@caf.mit.edu|To become as refined |
|Alexander Semyon Sherstinsky |myself|shers@caf.mit.edu|a person as possible.|
|Alex Sherstinsky |I |shers@caf.mit.edu|*********************|
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arc1-ca.pugleaf.net!utzoo!mnetor!tmsoft!torsqnt!jarvis.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!mit-eddie!mit-amt!mit-caf!shersShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!tmsoft!torsqnt!jarvis.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!mit-eddie!mit-amt!mit-caf!shers From: shers@mit-caf.MIT.EDU (Alexander The Great Sherstinsky) Newsgroups: comp.lsi Subject: A Question On Biasing Circuits Message-ID: <4025@mit-caf.MIT.EDU> Date: 3 Mar 90 18:45:11 GMT Reply-To: shers@mit-caf.UUCP (Alexander The Great Sherstinsky) Organization: Microsystems Technology Laboratories, MIT Lines: 27