Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-09-26
1976-10-26
Moose, Harry
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307235J, 330207P, H03K 520
Patent
active
039886441
ABSTRACT:
An integrated circuit, current protection network wherein the point of operation (trip point) can be changed over a wide range of values by proportioning the areas of the junctions of semiconductor devices. A pair of transistors form a high gain differential amplifier, with the emitter electrodes of the transistors connected to the ends of a sense resistor through which current flows to the device to be protected. Diodes are connected between the base and emitter electrodes of the two transistors with the same polarities as the junctions, so that the current flow through the transistors will be in accordance with the areas of the junctions of the transistors and diodes. During construction of the integrated circuit, the areas of the junctions can be selected to provide the desired trip point for the network. A differential to single ended converter load circuit is connected to the collector electrodes of the transistors, and controls the protected device when the trip point is reached. The load circuit can be a part of the integrated circuit, and the areas of the junctions can also be proportioned to further control the trip point. As the sense resistor and a current limiting resistor for the diodes are the only resistors required, the network is adapted for construction in integrated circuit form.
REFERENCES:
patent: 3604949 (1971-09-01), Conzelmann et al.
patent: 3872323 (1975-03-01), Frederiksen et al.
Gillman James W.
Moose Harry
Motorola Inc.
Southard Donald B.
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