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Subject: Analog signal amplifier and phase shifter needed (urgent)

Date: 06/14/01 at 4:11 PM
Posted by: Tudor Palanga
E-mail: tpalanga@hotmail.com
Message Posted:

In Reply to: ECG Amplifier circuit needed ( urgent ) posted by Lim on 12/07/00 at 5:49 AM:

I need an analog signal amplifier and any details about it or similar.

Circuit caracteristics :

- command: + - 10V sine signal, f=10...50kHz (reglable in this interval), curent MAX!! 20mA, eventually up to 100mA, but dangerous.
- can be feeded with up to 40-50 V cc

a. sine form identical with input, but + - 40V
identic frequency
b. same output as a. , but phase-shifted with 90 degrees or the possibility to change the phase-shift
f=10-50kHz (identic with input)

!!! This is used for the command of a piezoelectric rotary motor. The circuit output loads are much more like capacitors -> about 100nF

I thank you in advance.

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