The demodulator circuit board is stacked on top of the power supply in the box to save space. (Click to enlarge photo) On my bench, I’m lucky enough to have a classic Orban 8000, and sending through ...

The carrier frequencies for AM operate from 530 kHz to 1610 kHz. Many superheterodyne AM radios use a demodulation circuit designed for 455 kHz. When the listener tunes in a station, an oscillator ...

Figure 1 shows the FSK demodulation circuitry in which neither PLLs nor high-quality-factor bandpass filters are used. With this high-frequency (HF) demodulation circuit, no trimming adjustments ...

The TBA120 Series ICs provide a high-gain limiting IF amplifier and a quadrature coincidence detector in one package. These ICs are primarily intended for ...

Abstract The theoretical and practical requirements for introducing synchronous demodulation into domestic receivers for MF/LF broadcasting are discussed. The difficulties encountered in the ...

He’s broken down the modulation and demodulation circuits into their basic op-amp stages with examples of what the signal should look like on a scope after each stage. That’s the beauty here.

The output LC filter is included in the feedback loop to iron-out the characteristics of the demodulation circuit. “Regardless of the big phase shifting introduced by the output filter, the device ...

HFDA801A adopts an innovative feedback topology, where the LC filter is included in the feedback loop makes the amplifier insensitive to the characteristics of a demodulation circuit.