Receiver circuit for digital and analog modulated signal

Details Receiver circuit for digital and analog modulated signal Receiver circuit for digital and analog modulated signal

H - Electricity

04

B

H04B 1/06 (2006.01) H04B 1/26 (2006.01) H04L 27/00 (2006.01) H04M 1/725 (2006.01)

Patent

CA 2096476

A receiver circuit for receiving both digital and analog modulated signals has a high frequency amplifier for amplifying digital and analog modulated high frequency signals, a down conversion block for converting an output signal from the high frequency amplifier into an intermediate frequency signal, a root Nyquist bandpass filter for limiting the intermediate frequency signal from the down conversion block to a frequency band based on root Nyquist characteristics, an intermediate frequency signal linear amplifier for linearly amplifying the intermediate frequency signal from the root Nyquist bandpass filter, a limiter amplifier for limiting to a constant amplitude the intermediate frequency signal from the intermediate frequency signal linear amplifier, a received signal intensity detector for detecting received signal intensity information from the intermediate frequency signal from the intermediate frequency signal linear amplifier, a synchronizing clock signal generator for generating a synchronizing clock signal from the received signal intensity information from the received signal intensity detector, a digital demodulator for demodulating a digital modulated intermediate frequency signal from the limiter amplifier based on the synchronizing clock signal, and an analog demodulator for demodulating an analog modulated intermediate frequency signal from the limiter amplifier.

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