Analog-digital converter, semiconductor device, and voltage signal generation method
US10700693B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | May 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The analog-to-digital converter includes a quantizer for outputting a quantized signal, a sampling circuit for sampling an analog input signal, a dithering circuit for generating an added voltage, and an integrating circuit for integrating a signal on which the added voltage is superimposed and outputting an integration result to the quantizer. The dithering circuit includes a variable capacitance circuit and a control circuit. The variable capacitance circuit includes a plurality of capacitors. The control circuit controls the capacitance of the variable capacitance circuit to a capacitance smaller than the capacitances of the capacitors, and causes the variable capacitance circuit to generate an added voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.