Embedded variable output power (VOP) in a current steering digital-to-analog converter
US10862500B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2019 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Nov 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0007
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and associated methods relate to maintaining a total current of a switch cell in a digital-to-analog converter at a controllable operating point by adjusting shunt current control signals applied to programmable shunt current sources in opposite polarity with respect to a tail current control signal applied to a programmable tail current source. In an illustrative example, the total current may flow through differential legs of a switch cell. The programmable shunt current sources may, for example, be configured to compensate for adjustments to the programmable tail current source. In an illustrative example, tail current and shunt currents may flow through a pair of cascode transistors. In various examples, controlling the programmable shunt current sources to compensate adjustments to the tail current source may, for example, permit controlled common mode voltage or operating point so as to reduce device voltage stress over a wider dynamic range of output voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.