This circuit has a duty cycle of 50%. We found it in old English documentation. The center frequency is around 1 kHz.
With this circuit, a relay can be activated from an alternating signal with frequency up to a few...
This stethoscope or hearing aid amplifier has excellent gain. It was found in Popular Electronics from...
May 2017 - Mouser Electronics announced the availability of the LMX2491 a new PLL for frequencies...