Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-02-13
1991-10-08
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072968, 307270, 330288, H03K 3013, H03K 500
Patent
active
050557190
ABSTRACT:
A second generation current conveyor circuit for accepting a current at an input (100) at a low impedance and for providing an output current of the same or a related value at an output (101) at a high impedance. The circuit includes a first transistor (T101) connected in series with second diode connected transistor (T102) between the input and a first voltage supply line. A third transistor (T103) is connected in series with a fourth diode connected transistor (T104) between the first voltage supply line and an input terminal (102) for the application of a reference potential. A fifth transistor (T105) has a control electrode connected to the control electrodes of the second and third transistors and is connected between the first supply voltage line and the output. The control electrodes of the first and fourth transistors are connected in common. A cancelling current is internally generated for cancelling the current through the fourth transistor so that no current is drawn through the input terminal. The cancelling current is internally generated by a sixth transistor (T106) having a control electrode connected to the control electrode of the second transistor (T102) a current mirror circuit (T107, T108) feeds the cancelling current to the fourth transistor.
REFERENCES:
patent: 4450366 (1984-05-01), Malhi et al.
patent: 4471292 (1984-09-01), Schenck et al.
patent: 4879520 (1989-11-01), Cotreau
Franzblau Bernard
U.S. Philips Corporation
Zazworsky John
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