Burst generator (CB21067E)

Found in American documentation from the 90s, this circuit generates sound bursts according to the digital control.

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Q Multiplier (CB21745E)
The purpose of this circuit is to increase the selectivity of receivers with ferrite antennas. The circuit...
AC Power Switch with Optocoupler (CB12416E)
This solid-state relay circuit (SSR) or shield is from a 1995 Electronics Now. With it we can...
Ceramic Pickups Preamplifier (CB15754E)
We show a channel of a simple preamplifier for ceramic capsules. This circuit is based on a very...