PLL frequency synthesizer output control circuit

Details PLL frequency synthesizer output control circuit PLL frequency synthesizer output control circuit

1989-12-18

1990-11-06

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 11, 331 14, 331 25, 331DIG2, H03L 718

Patent

active

049689509

ABSTRACT:
A PLL frequency synthesizer IC chip having a sample frequency input terminal, data and address lines and a plurality of different output devices, and a mode control circuit for turning off any selected ones of the different output devices. The mode control circuit comprises a plurality of inputs connected to at least one of the data and address lines for determining different modes of operation, and a plurality of outputs connected to the plurality of different output devices for selecting ones of the plurality of different output devices to allow outputting therefrom and shutting off outputs from all of the remaining different output devices, based on the determined mode of operation.

REFERENCES:
patent: 4069462 (1978-01-01), Dunn
patent: 4868513 (1989-09-01), Piercy et al.

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