Low-current digital-to-analog converter
US5361068A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Apr 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/745
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current-multiplying digital-to-analog converter (DAC) produces a low-current output which has significantly reduced current spikes or "glitches" resulting from the inherent capacitances of the switching transistors. A transistor connected in what would normally be the output line of the DAC establishes a voltage which varies in proportion to the current in that line. This voltage is applied to the control terminal of a transistor in a second current line to regulate an output current which can be made very low without experiencing significant glitches. A DAC having differential outputs (actual and complementary values) is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.