Circuit, method, and apparatus for continuously variable...

Details Circuit, method, and apparatus for continuously variable... Circuit, method, and apparatus for continuously variable...

2006-06-27

2006-06-27

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S053000

Reexamination Certificate

active

07068205

ABSTRACT:
A circuit, method and microcontroller apparatus for performing an analog to digital conversion with continuously variable resolution is disclosed. The circuit includes a integrating modulator for converting an analog input signal, corresponding to an input voltage, to a digital signal at its output over an integrate time. The circuit also includes a counter with an enable input coupled to the integrating modulator output. The counter accumulates the number of cycles where the digital signal is positive during the sample period and provides a corresponding conversion result. Further, the circuit has a pulse width modulator; its output gates a clock to the counter enable input. The pulse width modulator is user programmable on-the-fly to set said integrate time and said sample period.

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