System of multi-channel shared resistor-string...

Details System of multi-channel shared resistor-string... System of multi-channel shared resistor-string...

2005-03-22

2005-03-22

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S143000, C341S145000

Reexamination Certificate

active

06870494

ABSTRACT:
System of multi-channel shared resistor-string digital-to-analog converters comprises a time-sharing interpolator converting the multi-channel digital audio input at low sample rate to the multi-channel digital audio output at high sample rate, a time-sharing sigma-delta modulator modulating the multi-channel digital audio input with a long sample wordlength from the interpolator to be a multi-channel digital audio output with a shorter sample wordlength, multi-channel shared resistor-string digital-to-analog converters converting the multi-channel digital audio input to be a multi-channel staircase analog signal output, and one low-order RC filter for each channel further attenuating the out-of-band noise in the analog staircase analog output, especially the high-frequency residue images.

REFERENCES:
patent: 5841382 (1998-11-01), Walden et al.
patent: 6281821 (2001-08-01), Rhode et al.
patent: 6433719 (2002-08-01), Yoon
patent: 6583662 (2003-06-01), Lim

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