TV Modulator (CB20773E)

This circuit for the VHF band of analog TV was found in Motorola documentation from the 70s. The integrated circuit used is uncommon today.

| Clique na imagem para ampliar |

Pulse Width to Capacitance Converter (CB6100E)
Suggested by Linear Technology, this 80's circuit makes use of an operational of the time but can...
Ultrasonic generator (CB21313E)
This circuit was found at Popular Electronics. The speaker is of the greater than 100-ohm...
Two Transistors MW Radio (CB12819E)
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...