Pulse or digital communications – Pulse width modulation
Reexamination Certificate
2005-11-29
2005-11-29
Bayard, Emmanuel (Department: 2638)
Pulse or digital communications
Pulse width modulation
C341S143000
Reexamination Certificate
active
06970503
ABSTRACT:
A circuit for converting an analog signal to a discrete pulse-width-modulated (PWM) signal uses a delta-sigma amplifier and a discrete PWM stage to produce a discrete PWM output signal having lower in-band signal noise then a PDM system and a lower signal distortion then a continuous PWM system. A multiple bit quantization stage drives the discrete PWM stage.
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Bayard Emmanuel
National Semiconductor Corporation
Vedder Price Kaufman & Kammholz P.C.
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