This 200 kHz oscillator was found on a 90's EDN. It consumes only 2.8 mW and has CMOS compatible output. CMOS power pins are not indicated.
This power supply was found in a RCA publication from the 1970s. The circuit uses transistors from that...
This very high input impedance preamplifier is from a publication of 1977 but can also be mounted...
This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the...