Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1980-06-11
1982-07-06
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307296R, 330 69, 330257, H03K 522
Patent
active
043385273
ABSTRACT:
A voltage-current conversion circuit comprises an input terminal, a conversion terminal, an output terminal, first and second emitter-coupled transistors having their bases respectively connected to the input terminal receiving an input signal and the conversion terminal, a current mirror load circuit connected to collectors of the first and second transistors, a constant current source connected to emitters of the first and second transistors, and an output transistor having its base connected to the collector of the second transistor and its emitter to the conversion terminal. When the collector of the output transistor is connected to the output terminal and an impedance element is connected to the conversion terminal, a current is provided at the output and conversion terminals which is obtained by dividing an input signal voltage applied to the input terminal with an impedance value of the impedance element. The voltage-current conversion circuit serves as a negative current conveyor. When the collector of the output transistor is connected to an input terminal of a current mirror having its output terminal connected to the output terminal of the conversion circuit, the converting circuit serves as a positive current conveyor. Proper combinations of the positive and/or negative current conveyors provide various analog computation circuits.
REFERENCES:
patent: 3194985 (1965-07-01), Smith, Jr. et al.
patent: 3309615 (1967-03-01), Baldwin et al.
patent: 4045694 (1977-08-01), Ahmed
patent: 4223276 (1980-09-01), Nagano
Sedra et al., A Second-Generation Current Conveyor and its Applications, IEEE Transactions on Circuit Theory, pp. 132-134, (Feb. 1970).
Black et al., Gyrator Implementation With Integrable Current Conveyors, IEEE Journal of Solid-State Circuits, vol. SC-6, No. 6, pp. 296-399, (Dec. 1971).
Fairchild Linear Integrated Circuits, Technical Data for the .mu. A749 Dual Operational Amplifier.
Davis B. P.
Miller, Jr. Stanley D.
Tokyo Shibaura Denki Kabushiki Kaisha
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