Title:
ソーナー用送信器
Document Type and Number:
Japanese Patent JP4411136
Kind Code:
B2
Abstract:
Provided is a sonar transmitter in which the structure is simplified and the power loss is decreased. A sonar transmitter comprises: a load unit having a transformer constituted with a primary wiring and a secondary wiring, and a wave transmitter to which the secondary voltage generated in the secondary wiring is applied; a control unit for outputting a PWM signal which originally has no offset voltage; and a transmission circuit unit which amplifies the PWM signal outputted from the control unit and applies it to the primary wiring as the primary voltage. The control unit comprises a memory circuit formed by ROM or RAM which stores a transmission signal waveform and a control circuit formed by a microcomputer or DSP, for example. With the present invention, a conventional feedback circuit, an adder and the like become unnecessary by outputting the PWM which originally contains no offset voltage.
Inventors:
Kotaro Tsubota
Yutaka Akira
Yutaka Akira
Application Number:
JP2004153090A
Publication Date:
February 10, 2010
Filing Date:
May 24, 2004
Export Citation:
Assignee:
NEC
NEC Network and Sensor Systems Co., Ltd.
NEC Network and Sensor Systems Co., Ltd.
International Classes:
G01S7/521; G01S7/524; H04B11/00; H03F1/26; H03F3/217; H03K7/08
Domestic Patent References:
| JP2002159087A | ||||
| JP10285123A |
Attorney, Agent or Firm:
Isamu Takahashi