Pipelined serial-parallel A/D converter
US4893124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Mar 2, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/146
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D converter of this invention includes a first A/D converter for A/D-converting the input signal and determining upper bits of the n-bit binary code, first and second sample-hold circuits, which are alternately switched each time the first A/D converter samples the analog input signal, for sampling and holding the analog input signal, in synchronism with a sampling timing of the first A/D converter, and a second A/D converter. The second A/D converter is constituted by a reference voltage generator for generating reference voltages, based on contents of the binary code obtained by the first A/D converter, a voltage comparator for comparing the reference voltage with a voltage value of the analog input signal held in one of the first and second sample-hold circuits, which sample and hold the analog input signal corresponding to the binary code, and an encoder for encoding a comparison result output from the voltage comparator and determining lower bits of the n bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.