Found in 1980s Electronics Design, this circuit covers 4 decades of frequencies with a unique control. A multi-turn trimpot is used for fine adjustment. The frequency range depends on C1.
This single pulse generator, loss detector, or peak detector was found in an old General Electric...
This PLL with operational amplifiers was found in 1969 documentation. The configuration can be...
This circuit is from the factory manual of the LM202, an uncommon operation today. It shows how to...