This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and the SCR is a general purpose type The pitch frequency is given by R1 and C1 as formula next to the diagram.
The figure shows how to implement a conventional current monitor with differential amplifier on an H...
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...
August 2016 - The new Schottky diodes from Vishay's ESMP series for surface mounting can now be...