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:
May. 08, 2007
Filed:
Nov. 25, 2003
Yasushi Nishimori, Nishinomiya, JP;
Minoru Handa, Nishinomiya, JP;
Shiroh Ozasa, Nishinomiya, JP;
Masaru Nishida, Nishinomiya, JP;
Hiromune Matsumoto, Nishinomiya, JP;
Yasushi Nishimori, Nishinomiya, JP;
Minoru Handa, Nishinomiya, JP;
Shiroh Ozasa, Nishinomiya, JP;
Masaru Nishida, Nishinomiya, JP;
Hiromune Matsumoto, Nishinomiya, JP;
Furuno Electric Co., Ltd., Hyogo-ken, JP;
Abstract
An ultrasonic transmitter generates a reference signal based on a clock signal of a specific frequency and a control signal made up of binary values 0 and 1 for controlling how the level (High or Low) of a carrier drive signal should change, and generates an analog signal constituting the carrier drive signal by pulse-duration-modulating the reference signal. Produced from the carrier drive signal, a driving pulse signal is shaped into a curved waveform having a gradually rising leading edge and a gradually falling trailing edge as the amplitude of the carrier drive signal is gradually increased and decreased based on the control signal.