| 摘要 |
PROBLEM TO BE SOLVED: To provide a demodulator for employing a local oscillator not needing sufficient accuracy so as to generate an intermediate frequency signal and demodulate a received signal. SOLUTION: The demodulator of this invention is provided with; a first local oscillator with a fixed frequency offset; a multiplier; a band pass filter; a limiter; a low pass filter; a second local oscillator; an analog/digital converter; an orthogonal detection section; a phase detection section; a delay detection section; an enhanced AFC section; and a BTR section so as to demodulate the received signal even when the first local oscillator does not sufficiently satisfy the frequency accuracy and has a fixed frequency offset.
|
