Fractional-N phase-lock loop with delay line loop having self-ca

Details Fractional-N phase-lock loop with delay line loop having self-ca Fractional-N phase-lock loop with delay line loop having self-ca

1997-11-24

1999-05-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327158, 327160, 331DIG2, 331 44, H03L 706

Patent

active

059072539

ABSTRACT:
A fractional-N phase-lock loop (PLL) with a delay line loop (DLL) having a self-calibrating fractional delay element which controls the PLL feedback signal in such a manner that the delay intervals for the feedback signal are: increased when small fractional divisors (<1/2) causing a lagging phase relationship or large fractional divisors (>1/2) causing a leading phase relationship are sensed; and decreased when small fractional divisors (<1/2) causing a leading phase relationship or large fractional divisors (>1/2) causing a lagging phase relationship are sensed.

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patent: 5682112 (1997-10-01), Fukushima
patent: 5696468 (1997-12-01), Nise

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