Digital/analog converter with programmable gain
US6646580B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Oct 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Digital/analog converter with programmable gain for converting a digital input signal (Dn) into an analog output signal, the digital/analog converter (1) having:a signal input (2) for applying the digital input signal (Dn)a reference current source (7) for generating a reference current (Iref&phgr;), the current intensity of the reference current output by the reference current source (7) being adjustable via a setting terminal (4) of the digital/analog converter (1)current mirror circuits which mirror the generated reference current (Iref) with an associated current mirror ratio to form mirror currentsa controllable switching device (57), which switches through the mirror currents output by the current mirror circuits, in a manner dependent on the digital input signal (Dn) present at the signal input (2), to a summation current node (62) for generating a summation current (Isum) anda current/voltage converter (17) for converting the generated summation current (Isum) into a corresponding voltage (UA), which is output as an analog output signal via an analog signal output (3) of the digital/analog converter (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.