Balanced Modulator MC1556G (CB14559E)

We found this circuit in Motorola's Linear Databook in 1990. The semiconductor component used is no longer common today.

Sawtooth generator (CB9143E)
Indicated for scanning circuit applications, we found this generator in a Radio Electronics from the 80s....
Sawtooth generator (CB23731E)
The circuit shown in figure 3 uses a programmable unijunction transistor (PUT) of the BRY39 type...
Sonic or vox switch with latch (CB22001E)
This is the version of the previous circuit with a locking system. The supply voltage is according to...