This circuit has a frequency range of 30 Hz to 100 kHz with an output signal of 1 Vrms. We found it in 70s American documentation. The integrated circuits are CA3140.
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
We found this circuit in a technical documentation on thyristors from the 70s. The circuit is set...
August 2017 - Microchip's new ATtiny1617 8-bit AVR microcontrollers running at 20 MHz and 16 kB...