System and method for low noise output divider and buffer having low current consumption
AssigneeSkyworks Solutions, Inc.
InventorsRajasekhar Pullela, Sohrab Samadian
Life of this patent
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Abstract
A low noise divider includes a voltage controlled oscillator (VCO) having a first frequency output, a frequency divider configured to receive the first frequency output and configured to provide a second frequency output; and a buffer circuit configured to receive the first frequency output and the second frequency output, the buffer circuit configured to provide the second frequency output as an output of the low noise divider, where a phase noise of the second frequency output is dependent only on a phase noise of the first frequency output.
Claims18
An apparatus comprising:
- a voltage controlled oscillator (VCO) configured to provide a first output at a first frequency;
- a frequency divider configured to receive the first output and configured to provide a second output at a second frequency;
- and
- a circuit responsive to the first output and the second output and configured to provide a third output having a frequency equal to the second frequency such that phase noise in the third output depends on phase noise in the first output and does not depend on phase noise in the second output.
A method for dividing a signal, comprising:
- providing a first output at a first frequency;
- dividing the first output to provide a second output at a second frequency;
- receiving the first output and the second output in a circuit configured to provide a third output having a frequency equal to the second frequency such that phase noise in the third output depends on phase noise in the first output and does not depend on phase noise in the second output.
A portable transceiver comprising:
- a transceiver;
- a voltage controlled oscillator (VCO) configured to provide a first output at a first frequency;
- a frequency divider configured to receive the first output and configured to provide a second output at a second frequency;
- and
- a circuit responsive to the first output and the second output and configured to provide a third output having a frequency equal to the second frequency such that phase noise in the third output depends on phase noise in the first output and does not depend on phase noise in the second output.
Dependencies are inferred from the claim text.