Title:
ULTRASONIC TRANSDUCER
Document Type and Number:
Japanese Patent JP3935848
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make an ultrasonic transducer reducible in cost and improvable in performance.
SOLUTION: This transducer is provided with a transduction circuit 2 for transducing an ultrasonic wave U into a high-frequency electric signal Zi, a local oscillation circuit 15 for generating an electric signal Zm of which the frequency approximates the high-frequency electric signal Zi transmitted from the transduction circuit 2, a field effect transistor 9T for mixing/detection for inputting the high-frequency electric signal Zi transmitted from the transduction circuit 2 into a gate terminal G, and for inputting the generated electric signal Zm in the local oscillation circuit 15 into a non-grounded source terminal S, and a filter circuit 10 for removing a high-frequency component from an electric signal Zt transmitted from a drain terminal D connected to no electric source in the field effect transistor 9T, and for taking out an audible frequency band of electric signal Zo.
Inventors:
Yoshihiko Uzaki
Application Number:
JP2003009700A
Publication Date:
June 27, 2007
Filing Date:
January 17, 2003
Export Citation:
Assignee:
TLV Co., Ltd.
International Classes:
G01F1/00; G01H3/00; G01H17/00; G01M3/24; H04B11/00; (IPC1-7): G01H17/00; G01F1/00; G01M3/24; //H04B11/00
Domestic Patent References:
| JP2000314729A | ||||
| JP5256725A | ||||
| JP5133836A |
Attorney, Agent or Firm:
Shuichiro Kitamura