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:
Feb. 13, 2018
Filed:
Apr. 15, 2015
Yamaha Corporation, Hamamatsu-shi, Shizuoka, JP;
Morito Morishima, Fukuroi, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A driving apparatus includes a power amplifier that supplies a driving signal to a vibrator, a current detector that outputs a detection signal corresponding to a driving current of the vibrator, and a driving controller that positively feedback a signal based on the detection signal to the power amplifier. The driving controller includes an A/D converter that A/D converts the detection signal, a first processing section that applies a gain compensation and compressor processes to an output digital signal of the A/D converter, a second processing section that performs a process of adding a digital signal corresponding to an input signal of the driving apparatus to an output digital signal of the first processing section, and a D/A converter that D/A converts an output digital signal of the second processing section to produce an analog signal supplied to the power amplifier.