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:
Jun. 29, 2021
Filed:
Apr. 01, 2020
Nidec Corporation, Kyoto, JP;
Masaki Yoshinaga, Kyoto, JP;
Taro Amagai, Kyoto, JP;
Akiko Ikeda, Kyoto, JP;
Kengo Araki, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A signal processing circuit amplifies a signal of a magnetic sensor that changes according to the magnitude of a magnetic force. The signal of the magnetic sensor is a pair of signals inverted from each other with respect to a reference voltage. The signal processing circuit includes: a high-pass filter that performs a high-pass filtering process on the complementary signals from the magnetic sensor; a differential amplifier that receives the complementary signals having been subjected to the high-pass filtering process by the high-pass filter as a differential input signal and amplifies the differential input signal at a predetermined amplification factor based on the reference voltage; and a comparator that outputs a binary signal indicating a comparison result between an output signal of the differential amplifier and the reference voltage.