Current steering semi-digital reconstruction filter
US5625357A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Feb 16, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/504
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current steering semi-digital reconstruction filter for a digital-to-analog conversion circuit, which includes a shift register having a 1-bit digital input stream and a plurality of output taps, where each output tap provides a 1-bit signal which has a value of a logic 1 or a logic 0, and a plurality of resistive paths, where each resistive path includes a resistive element which is connected to a common current source and to a first terminal of an active high switch and a first terminal of an active low switch. A single output tap is used to control the active high switch and the active low switch for a single resistive path. A second terminal of each active high switch of each of the plurality of resistive paths is connected to a non-inverted current path, and a second terminal of each active low switch for each of the plurality of resistive paths is connected to an inverted current path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.