发明名称 |
Synchronous frequency-to-voltage converter for doppler apparatus |
摘要 |
An ultrasonic Doppler flowmeter is provided with a frequency-to-voltage converter comprising a pair of interconnected filp-flops triggered by the Doppler frequency and a submultiple of the transmission frequency which produces a series of output pulses having a repetition rate determined by the Doppler frequency and a pulse duration inversely related to the frequency of transmission of the ultrasonic transmitter.
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申请公布号 |
US4183245(A) |
申请公布日期 |
1980.01.15 |
申请号 |
US19780953739 |
申请日期 |
1978.10.23 |
申请人 |
LEEDS & NORTHRUP |
发明人 |
CONNERY, JAMES G;DINAPOLI, LOUIS D;PUNIS, GIANCARLO |
分类号 |
G01F1/66;G01S13/50;(IPC1-7):G01F1/66 |
主分类号 |
G01F1/66 |
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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