Current steering mode digital-to-analog converter circuit configured to generate variable output current
US9323273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2014 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Oct 2, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/745
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A current source circuit is configured to receive a reference current at the input circuit path of a current mirror circuit. The current mirror circuit mirrors the reference current and generates mirror currents at a number of output circuit paths. A corresponding number of control transistors are connected in series with the output circuit paths. Each control transistor is selectively actuated in response to a control signal. A decoder circuit is configured to receive a variable control signal and generate actuation signals in response thereto to selective actuate the control transistors to pass the mirror current to an output node. At the output node, the passed mirror currents are summed to generate a variable output current. The variable current is monotonically modulated in response to the variable control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.