发明名称 |
TRIGGERING CIRCUIT FOR AN AEROSOL DRUG-DISPENSING DEVICE |
摘要 |
An electronic gas flow triggering circuit for use in an aerosol drug dispensing device has a voltage source and a self-nulling circuit to which voltage is supplied from the voltage source. A hot wire anemometer filament forms a component of the bridge circuit which is adapted to maintain a constant resistance of the anemometer filament, the bridge drive voltage being dependent upon the gas flow across the anemometer filament. A comparator compares the bridge output voltage with a reference voltage and provides a triggering signal to operate the device if the bridge drive voltage is greater than the reference voltage. |
申请公布号 |
WO0238206(A2) |
申请公布日期 |
2002.05.16 |
申请号 |
WO2001GB04963 |
申请日期 |
2001.11.07 |
申请人 |
THE TECHNOLOGY PARTNERSHIP PLC;GOODCHILD, MARTIN, SCOTT |
发明人 |
GOODCHILD, MARTIN, SCOTT |
分类号 |
A61M11/00;A61M15/00;A61M16/00;B05B17/00;G01P13/00 |
主分类号 |
A61M11/00 |
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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