Found in an American documentation from 1969, this circuit makes use of a pair of matched transistors of the time. The circuit supports modern equivalent components.
August 2017 - Microchip's new ATtiny1617 8-bit AVR microcontrollers running at 20 MHz and 16 kB...
This circuit for experimental radios and other applications is from a documentation from the 50's....
The operational amplifier used on this 1968 circuit is not common today. However, the setting can be...