发明名称 |
ULTRASONIC TRANSMITTER |
摘要 |
The transmitter comprises an array of electro-acoustic transducers (1), each of which is connected to an oscillator circuit (9) which has a start input (11). The start inputs (11) successively receive start signals from a start signal generator (13) which comprises a number of comparators (15), each of which comprises a first input (17) and a second input (19). The first inputs (17) are together connected to an output of a sawtooth generator (21), the second input (19) of each comparator (15) are connected to a direct voltage source (23). A direct voltage source (23) is provided for each start signal to be successively generated at least some of the direct voltage sources being controllable in common. |
申请公布号 |
DE3363121(D1) |
申请公布日期 |
1986.05.28 |
申请号 |
DE19833363121 |
申请日期 |
1983.01.26 |
申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
VAN HEELSBERGEN, TEUNIS ROBERT |
分类号 |
G01S7/523;G01S7/524;G10K11/34;(IPC1-7):G10K11/34 |
主分类号 |
G01S7/523 |
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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