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 ...

The circuit in Figure 1 complements a previous Design Idea ("SSB modulator covers HF band," EDN , Sept 30, 1999, pg 122). The modulator employs a phasing. ... Because the network in the modulator ...