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. 01, 2021
Filed:
Oct. 31, 2019
Nidec Corporation, Kyoto, JP;
Hideyuki Takemoto, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A signal processing apparatus includes a processor, a memory storing a program, and an integration circuit that performs filter processing on an input signal to output a processed signal. The processor samples an output signal output from the integration circuit in a sampling period Ts and stores a sampled value of the output signal in accordance with the program, and detects a duty of the input signal based on a difference between a value of the output signal at a time trepresenting a present time point and a sampled value of the output signal obtained at a time t−n representing an earlier time than the time tby an n sampling period when n is a positive integer, the value of the output signal, a value of the integer n, the sampling period Ts, and a time constant of a filter of the integration circuit.