Area-efficiency delta modulator for quantizing an analog signal
US8842029B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/022
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention comprises sample-and-hold circuit and digital-to-analog converter into a differentially operational unit. In analog-to-digital conversion unit, on the premise of fixed or non-fixed quantization error, analog-to-digital converter dynamically adjusts number of bits solved or size of quantized step according to the magnitude of differential voltage between sampled input signal and previously quantized input signal, thus this invention can reduce the non-necessary power consumption from redundant code and overload of input signal. Differentially operational unit and analog-to-digital unit share the same capacitor array which has binary-weighted arrangement to reduce circuit complexity and area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.