Digital-to-analog conversion circuit
US11196433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Dec 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/808
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog conversion circuit includes an operational amplification module having an operational amplifier connected to an output transistor to form a negative feedback circuit to obtain equal voltages at positive and negative ends. A negative end current flowing into the negative end is proportional to a positive end current flowing into the positive end. An input end of a conversion module is connected in parallel with a first resistor of the operational amplification module to obtain the same voltage as the first resistor, and an analog current proportional to the negative end current and positive end current. An output end of the conversion module is connected with the source of the output transistor and configured to receive the analog current and to make the analog current flow to an output resistor via the drain of the output transistor, to obtain an output current proportional to the positive end current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.