About: Piezo switch

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A piezo switch is an electrical switch based on the piezoelectric effect. The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". When the FET is on, current can flow through it as with a conventional metal contact-based switch. After the voltage pulse is dissipated in the gate resistor, the FET turns back "off", its normal high impedance state. The piezoelectric effect is the generation of electric charge when certain materials are under stress. In the case of piezo switches, the force could be compressive pressure that causes the (typically disc-shaped) piezo element to bend very slightly like a drumhead.

Attributes	Values
rdf:type	baseball player yago:Artifact100021939 yago:Control103096960 yago:Device103183080 yago:Instrumentality103575240 yago:Mechanism103738472 yago:Object100002684 yago:PhysicalEntity100001930 yago:Switch104372370 yago:Whole100003553 yago:WikicatSwitches
rdfs:label	Piezo switch (en)
rdfs:comment	A piezo switch is an electrical switch based on the piezoelectric effect. The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". When the FET is on, current can flow through it as with a conventional metal contact-based switch. After the voltage pulse is dissipated in the gate resistor, the FET turns back "off", its normal high impedance state. The piezoelectric effect is the generation of electric charge when certain materials are under stress. In the case of piezo switches, the force could be compressive pressure that causes the (typically disc-shaped) piezo element to bend very slightly like a drumhead. (en)
dcterms:subject	Switches
Wikipage page ID	17231317 (xsd:integer)
Wikipage revision ID	964305988 (xsd:integer)
Link from a Wikipage to another Wikipage	Pressure Switches Pulse wave Piezo ignition Piezoelectric sensor Piezoelectricity Analogue switch Time constant Drumhead Flip-flop (electronics) Force Gate (transistor) Resistor Charge (physics) Touch switch Martensitic stainless steel Semiconductor Vandalism Piezoresistive Field effect transistor
sameAs	Piezo switch Piezo switch Piezo switch Piezo switch Piezo switch
dbp:wikiPageUsesTemplate	dbt:Reflist dbt:Switches
has abstract	A piezo switch is an electrical switch based on the piezoelectric effect. The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". When the FET is on, current can flow through it as with a conventional metal contact-based switch. After the voltage pulse is dissipated in the gate resistor, the FET turns back "off", its normal high impedance state. The piezoelectric effect is the generation of electric charge when certain materials are under stress. In the case of piezo switches, the force could be compressive pressure that causes the (typically disc-shaped) piezo element to bend very slightly like a drumhead. Thus piezo switches produce a single, brief "on" pulse. This pulse can vary with the amount of pressure which is applied, since higher pressures generate higher voltages which take longer to dissipate. A capacitor may be used to store the charge to lengthen the time constant of the gate circuit and therefore the width of the pulse. With additional circuitry this pulse can be extended further or used to change the state of an output from steady "Off" to steady "On" by toggling a flip-flop.Piezo switches have some interesting advantages over their conventional mechanical counterparts. One is that there are no moving parts, just the small deformation on the front plate and the piezo element (typically a few micrometers). This means the lifetime of such a switch can be ensured to be tens of millions of operations, since there is no wear involved. Another advantage is that they may easily be completely sealed from the environment and thus made weatherproof. They are often constructed with stainless steel housings such that they are resistant to damage by vandals or heavy use. (en)
gold:hypernym	Analogue switch
prov:wasDerivedFrom	wikipedia-en:Piezo_switch?oldid=964305988&ns=0
page length (characters) of wiki page	2370 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Piezo_switch
is Link from a Wikipage to another Wikipage of	Analogue switch Vandal-resistant switch
is foaf:primaryTopic of	wikipedia-en:Piezo_switch

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