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. 24, 2018
Filed:
May. 27, 2016
Rohm Co., Ltd., Ukyo-Ku, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A TH terminal receives an analog control voltage Vwhich indicates a rotational speed. With a first platform, a capacitor and a discharging resistor are connected in parallel between an OSC terminal and the ground. A charging resistor and a first switch are arranged in series between the OSC terminal and a reference voltage line via which a stabilized voltage is supplied. When an oscillator voltage Vthat occurs at the OSC terminal reaches an upper-side threshold V, a switching circuit turns off the first switch. When the oscillator voltage Vfalls to a lower-side threshold value V, the switching circuit turns on the first switch. The oscillator voltage Vis compared with the voltage at the TH terminal, so as to generate a pulse-modulated control pulse S