Using a 4046 PLL we found this circuit in the December 1989 issue of Radio Electronics magazine. The circuit operates at 220kHz, but this frequency can be changed by changing C3.
This circuit can be controlled by pin 1 through the output of a microcontroller functioning as a...
This source is indicated for the power of the digital multimeter of the CIR12007, but it can be...
Found in American documentation from the 1990s, this circuit can generate signals of up to a few...