Method and apparatus for digital frequency conversion
AssigneeGenesis Microchip Inc.
InventorStanislav Grushin
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Abstract
A general method is provided to achieve frequency conversion in an all-digital frequency conversion device that produces an output signal having a selectable phase and frequency that is substantially synchronous with the input signal to be converted. A multiplicity of time-shifted signals is generated, and appropriate ones are selected to set and reset an output signal. An apparatus, computing system, and software product that implement the present invention are also provided.
Claims17
In a frequency conversion device, a method of frequency conversion, the method comprising the steps of:
- determining a plurality of frequency setting parameters;
- generating a plurality of time-shifted signals, wherein the plurality of frequency setting parameters includes a first set of parameters required to generate the plurality of time-shifted signals that includes the amount of time shift and the number of delayed signals;
- selecting an appropriate time-shifted signal to set an output signal based on a first reference signal;
- selecting an appropriate time-shifted signal to reset the output signal based on the first reference signal;
- and
- generating the output signal that corresponds to the selected time-shifted set signal and the selected time-shifted reset signal.
A system for digital frequency conversion, the system comprising:
- a processor arranged to determine a plurality of frequency setting parameters;
- a processor arranged to generate a plurality of time-shifted signals wherein the plurality of frequency setting parameters includes a first set of parameters required to generate the plurality of time-shifted signals that includes the amount of time shift and the number of delayed signals;
- a processor arranged to select the appropriate time-shifted signal to set an output signal based on a first reference signal;
- a processor arranged to select the appropriate time-shifted signal to reset the output signal based on the first reference signal;
- and
- an input/output device ranged to generate the output signal that corresponds to the set and reset signals.
Computer program product for frequency conversion in a frequency conversion unit, comprising:
- computer code for determining a plurality of frequency setting parameters;
- computer code for generating a plurality of time-shifted signals wherein the plurality of frequency setting parameters includes a first set of parameters required to generate the plurality of time-shifted signals that includes the amount of time shift and the number of delayed signals;
- computer code for selecting an appropriate time-shifted signal to set an output signal based on a first reference signal;
- computer code for selecting an appropriate time-shifted signal to reset the output signal based on the first reference signal;
- computer code for generating the output signal that corresponds to the selected time-shifted set signal and the selected time-shifted reset signal;
- and
- computer readable medium for storing the computer code.
An apparatus for digital frequency conversion, to apparatus comprising:
- a digital time shifting unit configured to receive a plurality of frequency setting parameters and output a plurality of time shifted signals based frequency setting parameters;
- a digital pulse generator unit coupled to the digital time shifted unit, wherein to digital pulse generator unit is configured to receive the plurality of time shifted reference signals, and output a plurality of time shifted pulses, wherein the plurality of frequency setting parameters includes a first set of parameters required to generate the plurality of time-shifted signals tat includes the amount of time shift and the number of delayed signals;
- a digital phase analyzer unit configured to receive a source signal having a first frequency and to output a phase information;
- a digital pulse selector unit coupled to the phase analyzer unit, and the pulse generator unit, wherein the digital pulse selector unit is arranged to output a set signal and a reset signal based upon the plurality of time shifted pulses and the phase information;
- and
- a digital output module coupled to the digital pulse selector unit, wherein the output module is arranged to generate a digital output signal having a second frequency based upon the set signal and the reset signal.
Dependencies are inferred from the claim text.