Signal generation duties could easily be handled by a 555 circuit at the low end, and a computer sound card at the higher end. [brmarcum] obviously put some time into his tutorial, but it’s not ...

You can tell, because he named the special multipath canceling circuit in his tuner ”The Asymmetrical Charge-Coupled FM Stereo Detector.” Although the name is worthy of science fiction, the ...

The PLL transmitter exciter has the functions of providing a stable, low noise, frequency-selectable RF signal and amplify it to a controllable output power sufficient to drive the power amplifier. It ...

1. The basic configuration of a PLL features a VCO output, controlling circuits such as the phase detector, and feedback dividers. The input to the phase detector is usually a stable reference ...

AM radios were easy to understand. The strength of the signal goes up and down, and the audio follows. FM radio is a little more difficult. [AllAmericanFiveRadio] has an old tube FM set and takes u… ...