Laser driver with high-speed and high-current and integrated circuit thereof
US11394172B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 5, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Feb 25, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0427
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high-speed high-current laser driver integrated circuit is invented. The laser driver includes an input stage circuit, a pre-drive circuit, a negative capacitance circuit, three parallel-connected output stages, and an active reverse termination circuit. A pair of voltage signals VIP, VIN are applied to the input stage circuit which amplifies these input signals to a pair of output voltage signals V1IP, V1IN. Then the voltage signals V1IP, V1IN are amplified by the pre-drive circuit to a pair of voltage signals V+, V− to the output stage circuit, and finally, a pair of modulated current signals IOP, ION are generated by the output stage circuit. The present invention does not use terminal resistance in the output stage circuit, so the power consumption of the circuit is much lower than that of the traditional circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.