Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

2007-10-16

2007-10-16

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C375S238000

Reexamination Certificate

active

11446829

ABSTRACT:
A converter of a digital signal into a pulse-width modulated signal, comprising a first conversion unit receiving, at a first frequency, successive digital signals each having one of a first determined number of values, and providing first intermediary signals, at the first frequency, each having one of a second determined number of values smaller than the first determined number; a unit performing a decimation of the first intermediary signals to provide second intermediary signals at a second frequency equal to the first frequency divided by the second determined number minus one; and a second conversion unit providing at the second frequency, from the second intermediary signals, a two-state pulse-width modulated signal having a minimum duration in one of the two states which is equal to the inverse of the first frequency, the first conversion unit receiving the pulse-width modulated signal.

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patent: 2004/0222907 (2004-11-01), Kranz
Nielsen, “High-Fidelity PWM-Based Amplifier Concept For Active Loudspeaker Systems With Very Low Energy Consumption”, J. Audio Eng. Soc. vol. 45, No. 7/8, Jul./Aug. 1997, pp. 554-570.
International Search Report (2 pgs).

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