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.
In the figure we have the way to use a shift register to divide the frequency of a signal by 9....
We found this circuit in Texas Instruments documentation from 1986. The circuit produces a...
This interesting transformerless class B output stage was found in a patent registration published in...