This Vienna bridge multi-band oscillator circuit was found in a 1974 Ferranti transistor manual. The circuit generates signals from 25 Hz to 1 MHz in 5 bands selected by the capacitors.
This 9 + 9 V symmetrical power supply was obtained in a 1977 symmetric publication but can still be...
This circuit is from a 1957 Japanese magazine, showing the use of OC19 in a high voltage inverter. The...
The basic application for a 4086 PLL is as a tone detection The circuit can be selected to...