Precision Tone Switch 4046 (CB25256E)

Using a 4046 PLL this circuit recognizes a 1.6 to 1.8 kHz tone by driving an output LED. The circuit is from a Radio Electronics from December 1989.

| Clique na imagem para ampliar |

Stepper motor driver (CB7174E)
Suggested by Siliconix documentation from the 90's, this circuit uses power MOSFETs according to the...
Line Receiver for Shared Line (CB13056E)
In the figure we show the typical configuration of a shared line using a twisted pair where the...
Simple TTL oscillator (CB9625E)
This circuit, which can be used as a shield or in other applications, can be found elsewhere on...