Synchronously pumped substrate analog-to-digital converter (ADC) system and methods
US6002355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.