Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Reexamination Certificate
2007-02-20
2007-02-20
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
C327S119000, C327S175000
Reexamination Certificate
active
10655024
ABSTRACT:
Provided is a frequency multiplier including a delay circuit, an XOR gate, and a control circuit and a method of operating such a frequency multiplier to adjust the duty cycle of a clock signal. During operation of the frequency multiplier the delay circuit receives a first clock signal and generates a delayed clock signal. The XOR gate receives the first clock signal and the delayed clock signal, performs an XOR operation on the received signals and outputs a second clock signal that has a frequency that is a multiple of the first clock signal. The control circuit monitors the phase difference between the first clock signal and the delayed clock signal and outputs a control signal corresponding to the detected phase difference to the delay circuit to adjust the time delay applied to the first clock signal by the delay circuit.
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Combined Search and Examination Report for GB Appl. No. 0328506.1 dated May 7, 2004.
Taiwanese Office Action w/ translation dated Feb. 14, 2005.
Jung Gun-Ok
Park Sung-Bae
Harness & Dickey & Pierce P.L.C.
Samsung Electronics Co,. Ltd.
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