Low resistance microcurrent regulated current source

Details Low resistance microcurrent regulated current source Low resistance microcurrent regulated current source

1974-12-16

1976-03-30

Mullins, James B.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307299B, 330 28, 330 30D, H03K 112

Patent

active

039477045

ABSTRACT:
A low resistance closed feedback loop regulated current source for supplying a load, the source being of the type including a transistor having input and output electrodes respectively connected between voltage input and current output terminals, and said transistor having a control electrode. The feedback loop includes amplifying means having an output connected to the transistor control electrode and having first and second inputs providing differential current gain for signal current at said inputs and for maintaining minimum differential voltage between said inputs. First and second PN semiconductor structures having first and second electrodes and having dissimilar junction boundary areas are provided with the first electrodes of said structures being connected to the respective first and second inputs of the amplifying means. A resistor is provided connected between the second electrode of the structure having the greater boundary area and the second electrode of the remaining structure. Means is provided coupled to sense current output of said source and is connected to the second electrode of said remaining structure for providing a feedback signal which causes the output of said current source to assume a predetermined value.

REFERENCES:
patent: 3822387 (1974-07-01), Mulder

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