Pulse stretcher (CB9244E)

Found in a 1967 American documentation, this circuit increases the duration of a pulse applied to its input. The circuit is used to drive a relay.

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Series regulator protection (CB8364S)
In the figure we have the configuration of series regulator protector suggested by Motorola in 1968...
Optical receiver (CB8785E)
Found in a 90’s HAM Radio, this circuit is used for an optical communications system or even audio...
RF Monitor (CB21686E)
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