Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device

摘要

In the present invention, the amplitude subtracting type of phase detector of the timing recovery section outputs a difference &ggr;_i of a synthesized amplitude deviation at ½ of a symbol time. The averaging section computes an average value of this difference &ggr;_i and outputs a phase control signal V_i corresponding to the average value to the phase controller. The phase controller controls a timing phase of the sampling clock according to this phase control signal V_i. Dichotomizer generates a recovered symbol clock by dichotomizing the sampling clock that has been timing phase controlled. Removal of DC offset from and demodulation of the sampled baseband signal is executed in parallel to the above processing using the recovered symbol clock with the Nyquist data extracting section, the offset detector, the offset correcting section, and the data determining section.