Coded data generation or conversion – Analog to or from digital conversion – Multiplex
Patent
1994-12-27
1997-05-06
Gaffin, Jeffrey A.
Coded data generation or conversion
Analog to or from digital conversion
Multiplex
341143, 341155, H03M 100
Patent
active
056275366
ABSTRACT:
A multiplexed delta-sigma modulator for performing analog to digital conversion on a plurality of input analog signals. These input analog signals are input to a multiplexer, where the input analog signals are converted into a single, time-division multiplexed analog signal. The time-division multiplexed analog signal is then received by the delta-sigma modulator, which oversamples the input signal and outputs a time-division multiplexed digital signal. The time-division multiplexed digital signal is then sent to a decimator which outputs a time-division multiplexed digital signal at a rate corresponding to the Nyquist rate of the input analog signals.
The signal is sent from the decimator to a first down-sampler, and then to a demultiplexer, where the time-division multiplexed, decimated signal is sent to the appropriate output port of the demultiplexer at a sequential rate corresponding to the sequential rate utilized by the input multiplexer. At each output port of the demultiplexer there is a second down-sampler operating at a predetermined rate to recover each of the plurality of digital output signals corresponding to the plurality of input analog signals.
REFERENCES:
patent: 4514760 (1985-04-01), Balaban et al.
patent: 5235558 (1993-08-01), Woodsum et al.
patent: 5248971 (1993-09-01), Mandl
patent: 5345233 (1994-09-01), Nagata et al.
patent: 5345236 (1994-09-01), Sramek, Jr.
Advanced Micro Devices , Inc.
Gaffin Jeffrey A.
Kost Jason L. W.
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