NCO with rational frequency and normalized phase
AssigneeBroadcom Corporation
InventorBrian Schoner
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Abstract
A numerically controlled oscillator (NCO) system for generating rational frequencies with normalized phase is disclosed. In one embodiment, the system comprises a rational NCO and a simple NCO. The rational NCO generates an overflow or correction value, based on a desired rational frequency of the system, and the simple NCO uses the overflow or correction value to generate the desired rational frequency.
Claims43
A numerically controlled oscillator (NCO) system comprising:
- first NCO circuitry that generates an overflow value;
- and
- second NCO circuitry that generates a sequence of numbers, adds the overflow value from the first NCO circuitry to at least one of the sequence of numbers, and outputs a resulting sequence of numbers.
A numerically controlled oscillator (NCO) system comprising:
- a first NCO that generates a correction value based on a desired rational frequency;
- and
- a second NCO that generates the desired national frequency using the correction value.
A method of operating a numerically controlled oscillator (NCO) comprising:
- generating a sequence of numbers based on a desired rational frequency;
- generating a correction value based on the desired rational frequency;
- adjusting at least one of the sequences of numbers using the correction value;
- and
- outputting a resulting sequence of numbers.
A method of operating a numerically controlled oscillator (NCO) comprising:
- generating an overflow value based on a desired rational frequency;
- and
- generating the desired rational frequency using the overflow value.
Dependencies are inferred from the claim text.