Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2008-04-08
2008-04-08
Lee, Benny (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S017000, C331S018000, C331S034000, C327S157000
Reexamination Certificate
active
07355486
ABSTRACT:
A current controlled, phase locked loop device includes a phase detector configured to compare a reference frequency to an output frequency of a current controlled oscillator (ICO), a charge pump coupled to the phase detector and a low pass filter coupled to the charge pump. A voltage to current (V to I) converter is coupled to the low pass filter, providing an output current for integral control of the ICO. A control circuit is coupled to the ICO, and receives increment and decrement outputs of the phase detector, wherein the control circuit is configured to provide proportional control of the ICO through an amount of bias current applied thereto.
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Kelkar Ram
Malladi Anjali R.
Cantor & Colburn LLP
International Business Machines - Corporation
Johnson Ryan J
Lee Benny
LeStrange Michael J.
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