Multiplexed analog-to-digital converter for relative and absolut

Details Multiplexed analog-to-digital converter for relative and absolut Multiplexed analog-to-digital converter for relative and absolut

1997-01-17

1998-04-07

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Multiplex

341155, 324 7659, H03M 134

Patent

active

057369496

ABSTRACT:
A multiplexed analog-to-digital converter to accept multiple dissimilar analog input signals and convert each analog input signal to a digital code that represents the ratio of the magnitude of the analog input signal to the difference of an upper reference voltage source and a lower reference voltage source is disclosed. The upper reference voltage source is selected by an analog multiplexer from a set of voltage reference sources that include the power supply voltage source of the analog-to-digital converter for analog input signals that are reference to the power supply voltage source, and a precision reference voltage source that is referenced to the band-gap of silicon to provide an absolute measurement of the analog input signal. The lower reference voltage source is selected by a multiplexer from such references as a ground reference source.

REFERENCES:
patent: 5231398 (1993-07-01), Topper
patent: 5568148 (1996-10-01), Furukawa et al.
patent: 5611624 (1997-03-01), Tornare
patent: 5673046 (1997-09-01), Hirajima et al.

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