Patent ID: 8228098

Claim:
In a pulse width modulation (PWM) frequency converter that receives a first PWM signal and outputs a second PWM signal having a different frequency than the first PWM signal, a method comprising: sampling a first PWM cycle of the first PWM signal to generate a first set of one or more PWM parameters, the sampling to determine a first value and a second value of the first set of one or more PWM parameters, the first value representative of a number of samples having a select sample value for the first PWM cycle and the second value representative of a total number of samples for the first PWM cycle; filtering the first set of one or more PWM parameters based on a predetermined change threshold to generate a second set of one or more PWM parameters, the filtering comprising: filtering the first value based on a change threshold range defined by the predetermined change threshold to generate a third value of the second set of one or more PWM parameters; and filtering the second value based on the change threshold range to generate a fourth value of the second set of one or more PWM parameters; and generating a second PWM cycle for the second PWM signal based on the second set of one or more PWM parameters.