Electrical transmission or interconnection systems – Plural supply circuits or sources – Load current control
Patent
1975-10-03
1977-01-18
Hohauser, Herman J.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Load current control
307 72, H02J 338
Patent
active
040041557
ABSTRACT:
Two sources of current are applied to a load. One source supplies a constant current which is at least equal to the maximum current to be supplied to the load in one polarity. The second source is in opposition to the first source and is capable of being controlled from zero to a value at least double the value of the constant current. A voltage feedback circuit in combination with a bipolar control signal provides a bipolar voltage across the load having maximum positive and negative voltage excursions equal to the control signal times the feedback circuit gain and current in either direction having a maximum value substantially equal to the constant current value. In this manner a high voltage regulated bipolar voltage can be controlled across a load using one controlled unipolar device while providing class A operation, that is, without cross-over distortion. An important feature of the invention is the positive and negative limiting of both load voltage and load current.
REFERENCES:
patent: 2772387 (1956-11-01), Liguori
Barber Alfred W.
Forbro Design Corporation
Hohauser Herman J.
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