Communications – electrical: acoustic wave systems and devices – Transmitter systems – With beam forming – shaping – steering – or scanning
Reexamination Certificate
2007-05-08
2007-05-08
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Transmitter systems
With beam forming, shaping, steering, or scanning
C367S137000, C600S447000
Reexamination Certificate
active
10720226
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.
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Handa Minoru
Matsumoto Hiromune
Nishida Masaru
Nishimori Yasushi
Ozasa Shiroh
Birch & Stewart Kolasch & Birch, LLP
Furuno Electric Co. Ltd.
Lobo Ian J.
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