Designed for the audio track, this circuit was found in a Popular Electronics from the 90's. Other operational can be used and R7 can be 470 k. The frequency is 1 kHz.
This other high stability thermocouple amplifier uses an 80's operating. The circuit can be used...
This 2.2 Hz to 24 kHz filter was found in the February 1995 issue of Electronics Now magazine. The circuit...
This circuit was suggested by Linear Technology in documentation from the 90s. The circuit applies to...