High speed multi-modulus prescalar divider

Details High speed multi-modulus prescalar divider High speed multi-modulus prescalar divider

2007-03-13

2010-11-02

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S219000, C375S221000, C375S294000, C375S302000, C375S376000, C455S067130, C455S276100, C331S002000, C331S016000

Reexamination Certificate

active

07826563

ABSTRACT:
A system and method are provided for multi-modulus division. The method accepts an input first signal having a first frequency and divides the first frequency by an integral number. A second signal is generated with a plurality of phase outputs, each having a second frequency. Using a daisy-chain register controller, phase outputs are selected and supplied as a third signal with a frequency. Selecting phase outputs using the daisy-chain register controller includes supplying the third signal as a clock signal to registers having outputs connected in a daisy-chain. Then, a sequence of register output pulses is generated in response to the clock signals, and register output pulses are chosen from the sequence to select second signal phase outputs. By using 8-second signal phase outputs, a third signal is obtained with a frequency equal to the second frequency multiplied by one of the following numbers: 0.75, 0.875, 1, 1.125, or 1.25.

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