Microwave multiplying D/A converter
US5134400A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jan 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/785
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analog converter circuit for use at RF frequencies includes an input transimpedance buffer receiving an RF input. A complimentary switched R2R ladder network is coupled to the input buffer at one end and to an output transimpedance circuit at its other end. The output transimpedance circuit has an extremely low impedance and provides an RF output. The switched ladder network is formed of transistors and includes a complimentary switch to maintain current and voltage regardless of the transistor states. A bi-phase D/A converter uses a mirrored complimentary switched R2R ladder network coupled between a phase splitter and the output transimpedance circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.