Multi-loop controlled VCO

Details Multi-loop controlled VCO Multi-loop controlled VCO

1991-06-19

1992-08-25

Pascal, Robert J.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 25, H03L 700

Patent

active

051422468

ABSTRACT:
Separate phase (or frequency/phase) detectors are used in separate feedback loops of a phase-locked loop, one of the detectors having a dead zone and the other detector having no dead zone. The dead zone of the one detector, rather than being regarded as undesirable as in the prior art, is used to gradually shift the effective loop bandwidth of the phase-locked loop from a wide bandwidth to a narrow bandwidth without requiring any deliberate control action or switching circuitry.

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