Patents by Inventor Daniel P. Orange, II

Daniel P. Orange, II has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Bipolar driver circuit including primary and pre-driver transistors
    Patent number: 5684427
    Abstract: A bipolar driver circuit includes a primary driver transistor and an independently controlled pre-driver transistor having an emitter connected to the base of the primary driver transistor and a collector connected to the collector of the primary driver transistor. In one embodiment, the collector of the primary driver transistor is connected to the output terminal of the driver circuit for sinking current from a load and, in another embodiment, the emitter of the primary driver transistor is connected to the output terminal of the driver circuit for sourcing current to a load. A first current source is connected to the base of the primary driver transistor and a second current source is connected to the base of the pre-driver transistor. The current sources are commonly controllable by an input signal. Also provided is an inverse conduction prevention circuit for preventing the pre-driver transistor from diverting base current from the primary driver transistor in the sink driver embodiment.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: November 4, 1997
    Assignee: Allegro MicroSystems, Inc.
    Inventors: Robert J. Stoddard, Daniel P. Orange, II, Roger C. Peppiette