Receivers
Preselector for SW receivers
The entry low capacitance of MOSFET modern, with two gates, will create negative inverse reaction through a uncoupled source resistor. Applied right this technique allows the creation of a entrance RF stage field with a relatively high dynamic range.
Radio amateur working on short wave: there is no need to tell, in the days of our [...]
Squelch schematic
Squelch is a circuit that acts to suppress the audio (or video) output of a receiver in the absence of a sufficiently strong desired input signal. This squelch circuit is simple and has an amplification for sufficiently large to be incorporated into an assembly of automatically control from a wide range of radio receivers. [...]
CB - FM receiver, simple 27MHz fm receiver
This is a simple FM-CB receiver built with TCA440 for listening CB ( citizen’s band ) transmissions with FM ( frequency modulation ).
CB-FM receiver circuit schematic design:
