Switched analog buffer (CB9315E)

This circuit was obtained from an application note from Analog Devices from the 90s. The components are from that time.

Residential Alarm (CB16909E)
This 1995 circuit uses interruption sensors or NC connected in series in any quantity. With the...
Telephone Spy (CB18047E)
This circuit transmits the audio signals from a telephone line to an FM receiver placed nearby. The...
Reference Voltage Amplifier (CB4906E)
This circuit is from an old manual of operational amplifiers. The setting can be adapted to work...