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Circuit Bench

Preamplifier with Several Gains (CB933E)
The transistors of this circuit may be the BC548 or BC549 and its power supply can be performed...
FSK code key (CB7039E)
Found in Texas Instruments documentation from the 1980s, this circuit applies to digital signal...
Pulse Generator (CB19332E)
This circuit generates high pulses from a sinusoidal input, using SCRs for this purpose. The...