Phase lock loop and method for operating the same

Details Phase lock loop and method for operating the same Phase lock loop and method for operating the same

2008-04-08

2008-04-08

Cox, Cassandra (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C331S034000

Reexamination Certificate

active

07355462

ABSTRACT:
A digital controller for a voltage controlled oscillator (VCO) is provided within a phase lock loop (PLL). The digital controller includes a digital filter having first and second inputs for receiving upward and downward adjustment signals, respectively. The digital filter generates an increment signal and a decrement signal in response to the upward and downward adjustment signals, respectively. The digital controller includes a digital counter having first and second inputs for receiving the increment and decrement signals, respectively. The digital counter generates a multi-bit output signal that represents a running sum of the increment and decrement signals. The digital controller further includes a digital-to-analog converter (DAC) having an input for receiving the running sum output signal generated by the digital counter. The DAC is defined to generate a control voltage for the VCO in response to receipt of the running sum output signal from the digital counter.

REFERENCES:
patent: 4048581 (1977-09-01), Lyberg
patent: 4646031 (1987-02-01), Fast et al.
patent: 5525935 (1996-06-01), Joo et al.
patent: 5757238 (1998-05-01), Ferraiolo et al.
patent: 5982208 (1999-11-01), Kokubo et al.
patent: 6653874 (2003-11-01), Ishikawa
patent: 6674332 (2004-01-01), Wunner et al.
patent: 6686784 (2004-02-01), Chang
patent: 6912260 (2005-06-01), Young et al.
patent: 6970046 (2005-11-01), Da Dalt et al.
patent: 7003023 (2006-02-01), Krone et al.
patent: 7180377 (2007-02-01), Leong et al.
patent: 2005/0129134 (2005-06-01), Itri

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