Phone noise canceler (CB9402E)

This circuit was found in a 1967 American documentation. The circuit uses components of the time, applying to analog lines.

| Clique na imagem para ampliar |

CMOS Driver (CB13776E)
This circuit is from a 1976 Motorola CMOS manual. It can be implemented with modern Darlingtons like...
Voltage Controlled Unijunction Oscillator (CB4432E)
In the figure we have the way of modulating or controlling the frequency of a relaxation...
Alternator Monitor (CB15050E)
The purpose of this circuit is to monitor the operation of an alternator in cars with a 12 V...