Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the capacitors used. The circuit is from a Radio Electronics from December 1989.
This circuit is from an October 1963 Radio Electroncs. It uses a single 2N18383 transistor and a...
We found this circuit in a 1972 RCA technical documentation. The comparator can be any type and C1...
Found in a 1970 EEE this circuit emulates a zener diode whose voltage can be set to R2. Power...