Digital-to-analog converter (DAC)-based driver for optical modulators
US10598852B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2019 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | May 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0291
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data driver includes pre-driver circuitry coupled to a digital-to-analog converter (DAC) via a plurality of bit lines. The pre-driver circuitry is configured to receive a plurality of first voltages corresponding to respective bits of a digital codeword. Each of the first voltages may have one of a first voltage value or a ground potential based on a value of the corresponding bit. The pre-driver circuitry is further configured to drive a plurality of second voltages onto the plurality of bit lines, respectively, by switchably coupling each of the bit lines to ground or a voltage rail based at least in part on the voltage values of the plurality of first voltages. The voltage rail provides a second voltage value that is greater than the first voltage value. The DAC converts the plurality of second voltages to an electrical signal which is an analog representation of the digital codeword.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.