Method and system for decimating a pulse width modulated...

Details Method and system for decimating a pulse width modulated... Method and system for decimating a pulse width modulated...

2008-03-28

2009-11-03

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from particular bit symbol

C341S050000

Reexamination Certificate

active

07612696

ABSTRACT:
A method and system of decimating a Pulse Width Modulated (PWM) signal (537) is provided. The method includes computing one or more timestamps (553) of the PWM signal (537), the PWM signal being at a first sample rate (567). The one or more timestamps (553) are computed at a second sample rate (568), which is lower than the first sample rate (567). Thereafter, the method generates a plurality of pre-filter signals (557-n) based on each of the one or more timestamps (553) and a plurality of translation factors (555-n). The plurality of pre-filter signals (557-n) is then filtered at the second sample rate (568) using a plurality of Infinite Impulse Response (IIR) filters (560-n) to generate a plurality of intermediate decimated Pulse Code Modulated (PCM) signals (563). The plurality of intermediate decimated PCM signals (563) is combined to generate a PCM signal (569).

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