Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
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.
Budd Mark O.
McDonnell Douglas Corporation
Stout Donald E.
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