Circuit configuration for phase locking

Details Circuit configuration for phase locking Circuit configuration for phase locking

1990-07-25

1992-04-07

Ro, Bentsu

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 331 16, 331 17, 331 27, 332128, H03L 7085, H04L 704

Patent

active

051031914

ABSTRACT:
A circuit configuration includes a controllable oscillator issuing an output signal. A phase detector is acted upon by a reference signal and by the output signal of the oscillator. A first charge pump is controllable by the phase detector and has an input connected to the phase detector and an output. A loop filter is connected between the first charge pump and the oscillator for triggering the oscillator. A second charge pump is connected parallel to the output of the first charge pump.

REFERENCES:
patent: 4271384 (1981-06-01), Beling et al.
patent: 4952888 (1990-08-01), Izumi
patent: 4952889 (1990-08-01), Irwin et al.
patent: 4954788 (1990-09-01), Leis et al.
patent: 4959618 (1990-09-01), Shier
patent: 4970472 (1990-11-01), Kennedy et al.
IEEE Transactions on Communications, vol. COM-28, No. 11, Nov. 1980; Floyd M. Gardner: "Charge-Pump Phase-Lock Loops".

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