Switched analog buffer (CB9315E)

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

Full wave control with SCR (CB21094E)
This circuit is from an American documentation from the 90's. The SCR can be of any type and the...
CW Micro transmitter (CB4051E)
This transmitter has the frequency that depends on the crystal. We find it in a 1980s...
Low level AM modulator (CB7148E)
Found in old documentation, this circuit is intended for low level amplitude modulation with low...