pH meter (CB21196E)

This circuit was found in documentation from Analog Devices. The circuit is based on an AD795 and a commercial pH probe.

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Telephone amplifier (CB9298E)
This circuit was obtained in a Popular Electronics of the 90s. The circuit uses integrated from...
Single Supply High Speed Buffer (CB14336E)
The configuration is from the 1994 Linear Applications Handbook by National Semiconductor. The...
50W Inverter (CB21485E)
This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no...