Pre-drive circuit
First Claim
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1. A pre-drive circuit, for on/off control of a switching transistor element, including a pulse transformer having two primary windings, comprising:
- first and second switching elements, each having a signal output terminal and a control terminal, and one being associated with each of the primary windings, which control currents flowing through the respective primary windings; and
feedback circuits which cross-connect the signal output terminals and the control terminals of said first and second switching elements.
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Abstract
A pre-drive circuit performs on/off control of a switching transistor element (Q1) through a pulse transformer (T) having two primary windings (P1, P2). Switching elements (Q2, Q3) are respectively connected to the primary windings. Feedback circuits (D1, D2) connect signal output terminals of the respective switching elements (Q2, Q3) to control terminals of the opposite switching elements (Q3, Q2).
13 Citations
7 Claims
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1. A pre-drive circuit, for on/off control of a switching transistor element, including a pulse transformer having two primary windings, comprising:
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first and second switching elements, each having a signal output terminal and a control terminal, and one being associated with each of the primary windings, which control currents flowing through the respective primary windings; and feedback circuits which cross-connect the signal output terminals and the control terminals of said first and second switching elements. - View Dependent Claims (2, 3)
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4. A pre-drive circuit for controlling switching of a transistor element, comprising:
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means, having first and second primary windings and a secondary winding, for performing on/off switching of the transistor element; first and second switching means, each having a control terminal and a signal output terminal, for controlling the currents flowing through the first and second primary windings, respectively; and feedback means for cross-connecting the control terminal of each of said first and second switching means to the signal output terminal of said first and second switching means. - View Dependent Claims (5, 6, 7)
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Specification