The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2012
Filed:
Mar. 01, 2010
Jing Wei Wang, Guangdong, CN;
Ai Hua Yu, Guangdong, CN;
Jing Wei Wang, Guangdong, CN;
Ai Hua Yu, Guangdong, CN;
O-Net Communications (Shenzhen) Limited, Shenzhen, CN;
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 the LC filter circuit, which ensures no power is wasted on the whole serial loop and achieves the requirement of low power consumption.