10 kHz Oscillator (CB21830E)

This circuit was found in a 1974 Ferranti transistor manual. The frequency is given by the capacitors, which can be changed.

Operational Astable (CB13284E)
This oscillator employs a Motorola operational amplifier common in the 70s. We can implement the...
Optical communication receiver (CB7850E)
This is the receiver for the previous circuit. The audio amplifier supports equivalents. The...
Logarithmic Converter (CB13769E)
We found this circuit in a publication from the 1970s. The circuit has a logarithmic gain...