Synchronously pumped substrate analog-to-digital converter (ADC)

Details Synchronously pumped substrate analog-to-digital converter (ADC) Synchronously pumped substrate analog-to-digital converter (ADC)

1997-06-26

1999-12-14

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341172, 327534, H03M 100

Patent

active

060023554

ABSTRACT:
An analog-to-digital converter (ADC) architecture is fabricated on a semiconductor substrate which is negatively capacitively charge pumped below ground and subject to feedback regulation, rate measurements and adjustments. The ADC receives signal inputs of positive and negative polarity relative to ground, while being powered at 0V and 5V, without any negative power source input, as a result of a closed feedback loop which keeps the negative bias voltage constant as external supplies and component voltages vary. The high frequency pumping of the silicon substrate is subject to timing requirements which permit high resolution analog input signals to be converted in the presence of pump noise.

REFERENCES:
patent: 4471290 (1984-09-01), Yamaguchi
patent: 4794278 (1988-12-01), Vajdic
patent: 5266842 (1993-11-01), Park
patent: 5770964 (1998-06-01), Suma

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