Clock control circuit for controlling the clock phase of a...

Details Clock control circuit for controlling the clock phase of a... Clock control circuit for controlling the clock phase of a...

2006-09-26

2006-09-26

Patel, Jay K. (Department: 2611)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C375S371000

Reexamination Certificate

active

07113561

ABSTRACT:
A clock phase control circuit is provided for controlling the clock phase of a transceiver, having a sampling circuit for sampling an analog received signal with a sampling clock signal; an echo signal compensation circuit for compensating an echo signal which is produced by means of a transmit signal transmitted by the transceiver, it being possible to set the echo signal compensation circuit in an adaptive fashion as a function of a setting signal; a control circuit for generating a control signal for controlling the clock phase, which control signal specifies the phase deviation between the signal phase of the sampling clock signal and a setpoint signal phase of an ideal sampling clock signal; a loop filter for filtering the control signal; a phase counter for generating the sampling clock signal as a function of the filtered control signal described [sic]. An amplitude limiting circuit which limits the amplitude of the filtered control signal to a limiting value is provided between the loop filter and the phase counter, the limiting value depending on the setting signal for the echo signal compensation circuit.

REFERENCES:
patent: 5287182 (1994-02-01), Haskell et al.
patent: 668 874 (1989-01-01), None
patent: 100 25 566 (2001-12-01), None
patent: 0 144 067 (1985-06-01), None
patent: WO 00/19655 (2000-04-01), None

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