Modulus control loop

Details Modulus control loop Modulus control loop

1984-06-28

1986-04-22

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

328 14, 331 18, 331 25, 331173, H03L 700

Patent

active

045845387

ABSTRACT:
An apparatus and method is disclosed for operating a modulus control loop of an LSI a phase locked loop integrated circuit (or descrete equivalent) and a dual modulus prescaler at higher frequencies. This is accomplished through the use of a flip flop whose input is the modulus control output from the synthesizer IC and whose clock input is provided by the output of the prescaler. This greatly extends the time available to shift the prescaler modulus control insuring that the control signals will not be missed and increasing the available frequencies that the modulus control loop may operate at.

REFERENCES:
patent: 4316151 (1982-02-01), Ooms
patent: 4344045 (1982-08-01), Das et al.

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