Muti-bit successive-approximation analog-to-digital converter wi

Details Muti-bit successive-approximation analog-to-digital converter wi Muti-bit successive-approximation analog-to-digital converter wi

1997-12-23

2000-02-22

Tokar, Michael

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341164, 341165, H03M 112

Patent

active

060285451

ABSTRACT:
The subject invention relates to a type of multi-bits successive-approximation ADC to convert analog signals into a N-bits digital output code, wherein N is the number of bits of output code. The ADC includes (a) an input sample/hold circuit that takes the sample of analog input signals during the first half of clock cycle, and maintains the analog input signals after the sampling and during a conversion process. The ADC also includes (b) a reference voltage generator, to produce different reference voltages, (c) CLOCK pulse generation circuitry to continuously produce CLOCK pulse signals, (d) several comparators for comparison of the sampled input signals with a rough reference voltage to produce a rough digital output code. The ADC applies a temperature scale to roughly estimate the sampled analog input signals, this to be completed in a second half of the CLOCK cycle. The ADC further includes (e) a digital thermometer decoder producing a signal output of N bits, and (f) and output code data recording device to provide the output of complete signal data after conversion has been completed.

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patent: 5696510 (1997-12-01), Paillardet et al.
patent: 5870042 (1999-02-01), Noda

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