Digital-to-analog converter of the current-adding type
US4539553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Mar 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/74
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog converter of the current-adding kind includes n input buffer circuits to which the bits of the digital signal are applied in parallel, a first ladder resistor network having n resistors connected in series to which complementary outputs of the input buffer circuit are connected, a second ladder resistor network for dividing output terminal voltages from the first ladder resistor network into 2(2.sup.n -1) voltages, (2.sup.n -1) switching circuits having inputs connected to voltage dividing points of the second resistor network, and a common summing resistor connected to the outputs of the switching circuits to add currents supplied thereto, thereby providing an analog voltage having a level corresponding to the numerical value of the digital input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.