发明名称 |
DRIVE NETWORK FOR AN ULTRASONIC PROBE |
摘要 |
TITLE DRIVE NETWORK FOR AN ULTRASONIC PROBE A drive network for an ultrasonic probe includes a network operative to apply a pulse to a feedback terminal of a phase comparator substantially simultaneously with the application to the probe of an excitation signal from a source at a predetermined frequency. This insures that at the start-up of the drive network the frequency of the feedback signal to the phase comparator leads the excitation signal also being applied thereto, to cause the excitation signal from the source to increase toward the resonant frequency of the probe, thereby to search for the resonant frequency of the probe. |
申请公布号 |
CA1288159(C) |
申请公布日期 |
1991.08.27 |
申请号 |
CA19870553471 |
申请日期 |
1987.12.03 |
申请人 |
DU PONT (E.I.) DE NEMOURS AND COMPANY |
发明人 |
CHOPERENA, ALFREDO M.;KOHLI, CHHAYA K. |
分类号 |
A61B8/00;A61M23/00;B06B1/02;G01N29/22 |
主分类号 |
A61B8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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