Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-09-03
1985-03-26
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
323315, 323317, 330288, G05F 308, G05F 320, H03F 130
Patent
active
045075735
ABSTRACT:
A series circuit consisting of the emitter-collector path of a first transistor of npn type and an input current source is connected between a negative voltage source and a positive voltage source. Another series circuit consisting of the emitter-collector path of a second transistor of npn type and the collector-emitter path of a fourth transistor of pnp type is also connected between the negative and positive voltage sources. A further series circuit consisting of a first resistor, the emitter-collector path of a third transistor of npn type, a second resistor, and the collector-emitter path of a fifth transistor of pnp type is connected between the negative and positive voltage sources. The second and third transistors have their bases connected together. The fourth and fifth transistors have their bases connected together. The collector of the first transistor is connected to the base of the fifth transistor. The base of the first transistor is connected to the emitter of the sixth transistor. A seventh transistor has the emitter connected to the negative voltage source, the base connected to the collector of the third transistor and the collector connected to an output current terminal. The fourth and fifth transistors have an equal emitter area, and the ratio of the emitter area of the third transistor to the emitter area of the second transistor is set to m(m>1). The ratio of the output current to that of the current source is less than unity. This ratio is determined solely by the ratio m and the ratio between the resistances of the first and second resistors and is free from any temperature coefficient.
REFERENCES:
patent: 3911353 (1975-10-01), Plassche
patent: 3936725 (1976-02-01), Schneider
patent: 4323854 (1982-04-01), Hester
patent: 4350904 (1982-09-01), Cordell
patent: 4414502 (1983-11-01), Wong
patent: 4435678 (1984-03-01), Joseph et al.
Nedungadi, "Accurate Submicroampere Controlled Current Source"; Electronic Letters (vol. 17, No. 9), 4/30/81; pp. 320-322.
Van Kessel et al., "Integrated Linear Basic Circuits", vol. 32, No. 1, Philips Tech. Rev. 1-12 (1971).
Anagnos Larry N.
Tokyo Shibaura Denki Kabushiki Kaisha
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