Patents by Inventor Hironobu Tani

Hironobu Tani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Voltage level detector, motor drive controller, motor apparatus, and method of detecting voltage level
    Patent number: 9515641
    Abstract: A voltage level detector is provided. The voltage level detector includes a comparator and a threshold level changer. The comparator compares a voltage level of an increasing or decreasing input signal with a threshold level, and generates and outputs a voltage level detection signal indicating that the input signal has reached the threshold level. The threshold level changer changes the threshold level of the comparator based on the voltage level detection signal by increasing the threshold level when the input signal is monotonically increasing and decreasing the threshold level when the input signal is monotonically decreasing.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hironobu Tani, Tomohiko Kamatani
  • VOLTAGE LEVEL DETECTOR, MOTOR DRIVE CONTROLLER, MOTOR APPARATUS, AND METHOD OF DETECTING VOLTAGE LEVEL
    Publication number: 20160094211
    Abstract: A voltage level detector is provided. The voltage level detector includes a comparator and a threshold level changer. The comparator compares a voltage level of an increasing or decreasing input signal with a threshold level, and generates and outputs a voltage level detection signal indicating that the input signal has reached the threshold level. The threshold level changer changes the threshold level of the comparator based on the voltage level detection signal by increasing the threshold level when the input signal is monotonically increasing and decreasing the threshold level when the input signal is monotonically decreasing.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 31, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hironobu Tani, Tomohiko KAMATANI