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 appeared in the September 1973 issue of Radio Electronics magazine and was...
This configuration can be applied to other transconductance operationals. The circuit has a gain...
This well-crafted twin-T oscillator configuration for low frequencies using the 741 was found in...