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:
Apr. 17, 2012
Filed:
Dec. 24, 2008
Tzu-cheng Teng, Taipei, TW;
Ching-sheng LI, Hsinchu County, TW;
Ming-jung Tsai, Chang-Hua, TV;
Shen-min Lo, Hsinchu, TW;
Tzu-Cheng Teng, Taipei, TW;
Ching-Sheng Li, Hsinchu County, TW;
Ming-Jung Tsai, Chang-Hua, TV;
Shen-Min Lo, Hsinchu, TW;
Anpec Electronics Corporation, Hsinchu Science Park, Hsin-Chu, TW;
Abstract
A rotating speed adjustment circuit for a heat dissipation fan includes a first node, a second node, a reception end for receiving a first control signal, a first resistor coupled to a voltage source and the first node, a second resistor coupled to the first node and the second node, a third resistor coupled to the second node and a ground end, a capacitor coupled to the first node and the ground end, a transistor coupled to the reception end, the second node and the ground end, an oscillator for generating an oscillating signal, and a comparator for comparing a signal of the first node and the oscillating signal, so as to output a second control signal to control a rotating speed of the heat dissipation fan.