Re: Differential amplifier design with input-side biasing??

On 21 Feb 2006 13:11:36 -0800, chessaurus@xxxxxxxxx wrote:

I greatly appreciate you taking the time to help me, but this solution
seems to produce an unamplified C, although I am hoping that the output
would include an amplified version of C, i.e. G*C. The solution
(A-B)*G + C is what my current instrumentation amplifier gives (with C
being the reference input).

Any ideas?

-Chess

I interpreted your request to mean that the offset needed to be inside
the common-mode loop to prevent amplifiers hitting the rails.

Is your need really a fixed <signal> offset with VARIABLE gain?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

It's what you learn, after you know it all, that counts.
.

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