Half Wave Fast Rectifier (CB5160E)

This 80's circuit can be made with current comparators. Rectification accuracy is 1% DC up to 100 kHz.

Transformerless 15 V and -6 V Power Supply (CB13924E)
This circuit was obtained in a publication for radio amateurs of the 70s. The PNP output...
Modulation Using na UJT (CB224E)
This circuit uses na Unijunction Transistor (UJT) to produce a modulation tone for several...
Battery Monitor (CB6398E)
This circuit was originally found in a Philips documentation from 1969. It is intended for sensing...