Circuit system with supply voltage for driving an electromechanical switch

A technology of electrical systems and circuits, applied in the direction of protection switches, electrical switches, electrostatic relays/electro-adhesion relays using micro-machines, etc., can solve the problems of expensive, large volume, dense area, etc.
CN101388302AInactive Publication Date: 2009-03-18GENERAL ELECTRIC CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GENERAL ELECTRIC CO
Publication Date
2009-03-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a circuit system with supply voltage for driving an electromechanical switch. A circuit (10) for controlling operation of a load (16) is disclosed. In one example, a MEMS switch (20) is positioned in the circuit(10) to place the load (16) in one of a conducting state or a nonconducting state. A piezoelectric transformer (46) provides a relatively high voltage output signal or a relatively low voltage output signal to control movement of the switch (20) between a closed position, placing the load in the conducting state, and an open position. The high voltage output signal includes a frequency component in the resonant frequency range of the transformer (46). Control circuitry (65) provides an input voltage signal to the piezoelectric transformer (46) to provide the high voltage output signal or the low voltage output signal at the output terminals of the piezoelectric transformer (46).
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Description

technical field

[0001] The present invention relates generally to voltage conversion, and more particularly to circuits and systems incorporating current loads and switches for controlling current flowing therethrough. Background technique

[0002] Electromechanical switches are typically gated into a conducting or non-conducting state using a switching DC voltage power supply or a switching AC power supply. Many applications require very fast switching characteristics, which can be achieved using microelectromechanical (MEMS) switches. This switch has unique voltage and current characteristics and can achieve switching speeds of about 3 to 20 microseconds. As the size of switching components continues to shrink, the characteristics of a driver circuit that can provide acceptable performance and package size are becoming more demanding.

[0003] In many power circuit applications, including, for example, televisions and fluorescent lamps, wire wound electromagnetic transfo...

Claims

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