This circuit was found in Texas Instruments documentation from 1968. The transistors are from that time, admitting modern equivalents. The response ranges is from 20 to 20 000 Hz.
This circuit was originally suggested in a 1968 publication to generate a white mark (frame) on a...
This CMOS circuit was found in the July 1990 Radio Electronics magazine. Power is for a 12V...
This is the traditional configuration of an AND gate using an operational amplifier. Operational...