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- Newsgroups: sci.electronics
- Path: sparky!uunet!stanford.edu!nntp.Stanford.EDU!kong
- From: kong@leland.Stanford.EDU (Kong Kritayakirana)
- Subject: Opamp Based Integrator
- Message-ID: <1992Dec12.103134.25831@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (USENET News System)
- Organization: DSG, Stanford University, CA 94305, USA
- Date: Sat, 12 Dec 92 10:31:34 GMT
- Lines: 41
-
-
- Hi Netters:
-
- I am new in electronics land, so please be gentle....
- I have a question. I want to a build an integrator (an opamp based) but I
- heard horror things about opamps voffset and stuff. So any improvement on
- the following circuit is much appreciated.
-
-
- +-------R2-----------+
- | |
- +-------C------------+
- | |
- | |\ +-- +Vs |
- | | \ | |
- | | \| |
- | | \ |
- Vin ----R1---+----| - \ |
- | \---------+ Vout
- | /
- +----| + /
- | | /
- GND | /| R2 >> R1
- | / +-- -Vs
- |/
-
- 1. I don't need an opamp with awesome slew rate to make an integrator, right?
- 2. How do I deal with Voffset problem.
- 3. This is going to be used in a high precision, low noise data acquisition.
- The professor I work for doesn't know anything about electronics, but he
- WANTS LOWEST POSSIBLE noise. What opamp should I use for Vinput with band
- width of about 500kHz. The circuit is NOT a power circuit.
-
- Please email reply. Thanks in advance. Hope I can learn more about electronics
- and contribute to the group in the future.
-
- Kong (kong@leland.stanford.edu)
-
- PS: The text I have is 1. Art of Electronics by Horowitz and Hill
- 2. Some TI databook on opamps
-
-