Phase adjusting circuit for a demodulator

Details Phase adjusting circuit for a demodulator Phase adjusting circuit for a demodulator

1993-04-27

1996-01-09

Tse, Young

Pulse or digital communications

Receivers

Angle modulation

375344, 329360, H03D 300

Patent

active

054835550

ABSTRACT:
A phase adjusting circuit for a demodulator is provided. The circuit comprises an A/D converter for sampling an input analog signal at an interval shorter than the Nyquist interval and converting the sampled analog signal to a digital signal, a digital filter for narrowing the frequency band of the digital signal to output a filtered digital signal, a digital sampling/holding circuit for decimating sampling components of the filtered digital signal to output a decimated digital signal, and a phase locked loop circuit for detecting a phase error of the decimated digital signal and controlling the number of sampling intervals to be skipped by the digital sampling/holding circuit.

REFERENCES:
patent: 4543600 (1985-09-01), Bolger
patent: 4600889 (1986-07-01), Rugen
patent: 4672447 (1987-06-01), Moring et al.
patent: 5084913 (1992-01-01), Kingston et al.
patent: 5170368 (1992-12-01), Hattori

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