The circuit presented is a Japanese commercial radio from the 1960s. With a 4.5 V supply, it is a super-heterodyne type with an IF of 455 kHz. 6 germanium transistors are used.
This circuit was obtained in a documentation from the 70s. The operational amplifiers used are...
Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the...
This is one of many power control or dimmer configurations that we have found on this site and in...