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AssigneeAllegro MicroSystems, LLC
InventorsRobert J. Stoddard, Daniel P. Orange, II, Roger C. Peppiette
Estimating the term…
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.
A bipolar driver circuit including a primary driver transistor having a collector and an emitter, one of which is connected to an output terminal of said bipolar driver circuit, and a base and a pre-driver transistor having an emitter connected to the base of said primary driver transistor, a collector connected to the collector of said primary driver transistor and a base, said bipolar driver circuit comprising:
A bipolar driver circuit having an output terminal for coupling to a load, said bipolar driver circuit comprising:
A bipolar driver circuit including a primary transistor having a collector and an emitter, one of which is connected to an output terminal of said bipolar driver circuit, and a base and a pre-driver transistor having an emitter connected to the base of said primary driver transistor, a collector connected to the collector of said primary driver transistor and a base, said bipolar driver circuit comprising:
Dependencies are inferred from the claim text.