Clock multiplier and clock generator having the same

Details Clock multiplier and clock generator having the same Clock multiplier and clock generator having the same

2007-08-15

2010-06-29

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S170000

Reexamination Certificate

active

07746128

ABSTRACT:
A clock multiplier includes a phase-frequency detector, a voltage-current converter, a duty ratio control circuit, a plurality of variable delay cells and an edge combiner. The phase-frequency detector generates control signals. The voltage-current converter converts the control signals to generate first and second current control voltages. The duty ratio control circuit modifies the duty ratio of an input clock signal based on the first and second current control voltages. Each of the variable delay cells generates a triangular wave voltage based on the modified input signal, generates a square wave voltage based on the triangular wave voltage to generate a delay signal. The edge combiner generates a plurality of multiplied clocks based on the delay signals from the variable delay cells.

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