Digital serializer based pulsewidth modulator controller
AssigneeAlcatel Lucent
InventorsRami Labib, James Michael Schriel
Life of this patent
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Abstract
Various exemplary embodiments relate to a method performed by a pulsewidth modulation (PWM) controller, the method including: receiving a control input including PWM parameters; producing inputs to a digital serializer, wherein the inputs result in a digital serializer output that is pulsewidth modulated according to the PWM parameters; receiving a feedback control input; and modifying inputs to a digital serializer based upon the feedback control input.
Claims18
A method performed by a pulsewidth modulation (PWM) controller, the method comprising:
- receiving a control input including PWM parameters;
- producing inputs to a digital serializer, wherein the inputs result in a digital serializer output that is pulsewidth modulated according to the PWM parameters;
- receiving current and voltage sense data to be included in a feedback control input;
- and
- modifying inputs to the digital serializer based upon the feedback control input.
A method performed by a pulsewidth modulation (PWM) controller including a digital serializer, the method comprising:
- receiving a control input including PWM parameters;
- determining N and M based upon the PWM parameters, wherein N is the number of ON discreet time periods and M is the number of OFF discreet time periods where M+N discreet time periods correspond to a pulse repetition interval;
- producing a plurality of digital serializer input data words corresponding to N ON discreet time periods and M OFF discreet time periods;
- applying the plurality of digital serializer input data words to the digital serializer to produce a PWM signal having an initial duty cycle;
- altering N and determining a desired duty cycle based on a feedback control input;
- and
- varying the pulse repetition interval to result in a duty cycle close to the desired duty cycle.
A pulsewidth modulation (PWM) controller comprising:
- a digital serializer configured to receive a parallel input data stream and to produce a output serial data stream based upon the input parallel data stream;
- and
- a loop controller including an output connected to the digital serializer and an input configured to receive current and voltage sense data to be included in a feedback control input,
- wherein the loop controller is configured to output a parallel input data stream to the digital serializer based upon the feedback control input and wherein the output serial data stream from the digital serializer has desired PWM parameters.
Dependencies are inferred from the claim text.