发明名称 |
Loop powered process control instrument power supply |
摘要 |
A loop powered process instrument comprises a control circuit measuring a process variable and developing a control signal representing the process variable. An output circuit for connection to a two-wire process loop controls current on the loop in accordance with the control signal. A power supply circuit is connected to the output circuit and the control circuit for receiving power from the two-wire process loop and supplying power to the control circuit. The power supply comprises cascaded charge pump circuits.
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申请公布号 |
US7271646(B2) |
申请公布日期 |
2007.09.18 |
申请号 |
US20030670036 |
申请日期 |
2003.09.23 |
申请人 |
MAGNETROL INTERNATIONAL, INC. |
发明人 |
FLASZA MICHAEL D. |
分类号 |
G05F3/08;G08C19/00;H02J7/34;H02M3/07 |
主分类号 |
G05F3/08 |
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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