Voltage Level Detector (CB6212E)

This circuit was found in Siliconix documentation from the 1980s. Common comparators or operational ones can be used. Transistors are commonly used.

Balanced Modulator (CB4191E)
This circuit is intended for SSB transmission by generating two sideband signals with the carrier...
TLV62568 A high efficiency 1A Buck converter (ART339bE)
Launched in April 2017 by Texas Instruments, the TLV62568 is a high-efficiency synchronized Buck...
Vehicle Immobilizer (CB1423E)
In this circuit of an American publication of 1978, the integrated circuit may be the 4001 and the...