发明名称 |
DRIVING CIRCUIT FOR A CIRCUIT GENERATING AN ULTRASONIC PULSE, IN PARTICULAR AN ULTRA-SONIC TRANSDUCER, AND CORRESPONDING DRIVING METHOD |
摘要 |
A driving circuit has output terminal connected to an ultrasonic transducer and provides an output voltage. The driving circuit includes an output transistor coupled between a voltage reference and the output terminal, a high voltage comparator coupled to said output terminal and to a threshold voltage reference), a start-up circuit controlled by a setting signal; and a switching ON/OFF circuit having an input coupled to the start-up circuit an input coupled to the comparator, and an output coupled to a control terminal of the output transistor. The start-up circuit provides an ON signal to the switching on/off circuit and the comparator provides an OFF signal to the switching on/off circuit which switches off the output transistor. The high voltage comparator generates the switching off signal in response to the output voltage reaching a desired supply voltage value which depends on the value of the first threshold voltage reference.
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申请公布号 |
US2012299643(A1) |
申请公布日期 |
2012.11.29 |
申请号 |
US201213484078 |
申请日期 |
2012.05.30 |
申请人 |
RICOTTI GIULIO;ROSSI SANDRO;STMICROELECTRONICS S.R.L. |
发明人 |
RICOTTI GIULIO;ROSSI SANDRO |
分类号 |
G05F3/02 |
主分类号 |
G05F3/02 |
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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