Methods and apparatus for multiplexed signal sources using...

Details Methods and apparatus for multiplexed signal sources using... Methods and apparatus for multiplexed signal sources using...

2007-03-29

2008-11-04

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S154000, C341S029000, C341S131000, C455S573000

Reexamination Certificate

active

07446691

ABSTRACT:
A multiplexing circuit uses parallel-configured pairs of resistors and signal sources in a voltage divider network in such a way that a single analog-to-digital input can be used to specify the state of more than one signal source. One circuit includes a microprocessor having an analog-to-digital (ADC) input; a memory communicatively coupled to the microprocessor; and a voltage divider network having an output coupled to the ADC input, wherein the network includes a plurality of resistors paired with a plurality of respective signal sources, and wherein the output is unique for each combination of states of the signal sources in accordance with a known relation that is stored in the memory. The signal sources are selected from two categories of sources: continuous sources and discrete sources, where discrete sources may be binary discrete or random discrete. In one embodiment, the first signal source is either a continuous source or a random discrete source, and the second signal is a binary discrete source.

REFERENCES:
patent: 5289191 (1994-02-01), Elms
patent: 6057795 (2000-05-01), Suzuki
patent: 6434404 (2002-08-01), Claxton et al.

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