Low power consumption pump driving circuit
US8238394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2010 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Mar 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/02407
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present patent application provides a low power consumption pump driving circuit including a laser cooling chip, a PMOS transistor, a NMOS transistor, a LC filter circuit, a laser, and a voltage sampling circuit. The pulse width modulating signal generated by the laser cooling chip and the control terminal of the PMOS transistor are connected to the gate of the PMOS transistor. The source of the PMOS transistor is connected to a power supply. The drain of the PMOS transistor is connected to the LC filter circuit. The other terminal of the LC filter circuit is connected to the anode of the laser. The cathode of the laser is connected to the drain of the NMOS transistor. The source of the NMOS transistor is connected to the ground. One terminal of the voltage sampling circuit is connected to the laser. The other terminal of the voltage sampling circuit is connected to the laser cooling chip. The circuit according to the present patent application has only two modes: the saturation active mode and the cutoff mode. When the PMOS and the NMOS are in the saturation active mode, the power consumed by the transistors is negligible. The laser is driven by a DC signal converted through t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.