This precision signal rectifier was obtained in an American technical documentation from 1975. The operational amplifiers can be 741 and the power must be supplied from a symmetrical source.
This is the typical circuit of a 60's tape recorder. The circuit uses only two transistors and has a...
April 2017 - Microchip's new PICLF153 microcontrollers that already incorporate analog and...
This commercial radio with 3 earphone listening transistors was manufactured in Japan in the...