Broadband piezoelectric shunts for structural vibration control

Details Broadband piezoelectric shunts for structural vibration control Broadband piezoelectric shunts for structural vibration control

1998-03-12

2000-06-13

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4104

Patent

active

060753099

ABSTRACT:
A negative capacitance converter is used in combination with a buffer circuit to form an electrical shunt circuit. The negative capacitance converter and the buffer circuit, together, minimize or eliminate oscillations of a negative impedance generated by the electrical shunt circuit. Additionally, a specific configuration of the negative capacitance converter is used to provide optimum stability. The buffer circuit includes a Riordan-type circuit, with the negative capacitance converter being substituted for one of the impedance elements of the Riordan-type circuit. Resistors are used to replace the other impedance elements of the Riordan-type circuit. An additional capacitor is placed across one of the operational amplifiers of the Riordan-type circuit, in order to provide additional stability.

REFERENCES:
patent: 4156823 (1979-05-01), Suzuki
patent: 4158787 (1979-06-01), Forward
patent: 4471257 (1984-09-01), Kleinschmidt
patent: 5032753 (1991-07-01), Yamaguchi et al.

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