PCM switching (CB9403E)

Using a tunnel diode, this circuit was found in a 1966 American publication. The circuit is for signals sampled at a speed of 8,000 sps.

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Product detector (CB9684E)
Found in Motorola documentation from the 1980s, this circuit employs an integrated device from...
Transistorized Receiver (CB21897E)
This MW receiver was found in a Raytheon circuit manual from the 1960s. Transistors are the first...
Infrared alarm receiver (CIR25209E)
This is the receiver from the previous alarm system. The circuit is from Radio Electronics, April...