Average and decimate operations for bang-bang phase detectors
AssigneeSamsung Display Co., Ltd.
InventorsValentin Abramzon, Amir Amirkhany, Anup P. Jose
Life of this patent
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Abstract
A system and method for a decimated phase detector circuit includes a bang bang phase detector (BBFD), an UP rolling counter connected to an UP output of the BBFD, and a DOWN rolling counter connected to a DOWN output of the BBFD. A charge pump is connected to the UP rolling counter and the DOWN rolling counter and is configured to receive a decimated UP signal from the UP rolling counter and a decimated DOWN signal from the DOWN rolling counter. The charge pump is further configured to provide a control voltage according to the received decimated UP signals and decimated DOWN signals.
Claims20
A decimated phase detector circuit comprising:
- a bang bang phase detector (BBFD);
- an UP rolling counter connected to an UP output of the BBFD, wherein the UP rolling counter is configured to output the decimated UP signal each time the UP state of the UP rolling counter rolls over to zero;
- a DOWN rolling counter connected to a DOWN output of the BBFD, wherein the DOWN rolling counter is configured to output the decimated DOWN signal each time the DOWN state of the DOWN rolling counter rolls over to zero;
- and
- a charge pump connected to the UP rolling counter and the DOWN rolling counter and is configured to receive a decimated UP signal from the UP rolling counter each time the UP rolling counter rolls over to zero and a decimated DOWN signal from the DOWN rolling counter each time the DOWN rolling counter rolls over to zero, wherein the charge pump is further configured to provide a control voltage according to the received decimated UP signals and decimated DOWN signals.
(canceled)
A method of decimating a bang bang phase detector comprising:
- receiving, at an UP rolling counter, UP signals from the bang bang phase detector (BBFD) and incrementing an UP state for each received UP signal;
- receiving, at a DOWN rolling counter, down signals from the BBFD, and incrementing a DOWN state for each received DOWN signal;
- providing to a charge pump, by the UP rolling counter, a decimated UP signal each time the UP state of the UP rolling counter rolls over to zero;
- and
- providing to the charge pump, by the DOWN rolling counter, a decimated DOWN signal each time the DOWN state of the DOWN rolling counter rolls over to zero.
A method of decimating a bang bang phase detector comprising:
- incrementing, at an UP rolling counter, an UP state based on a received UP signal from the bang bang phase detector (BBFD);
- incrementing, at a DOWN rolling counter, a DOWN state based on a received down signal from the BBFD;
- providing, by the UP rolling counter, a decimated UP signal to a charge pump, each time the UP state of the UP rolling counter rolls over to zero;
- providing, by the DOWN rolling counter, a decimated DOWN signal to the charge pump, each time the DOWN state of the DOWN rolling counter rolls over to zero;
- and
- integrating, at the charge pump, a total of decimated UP signals minus a total of decimated DOWN signals.
Dependencies are inferred from the claim text.