Drive circuit for controlled edge power elements
AssigneeSTMicroelectronics S.r.l.
InventorFrancesco Chrappan Soldavini
Life of this patent
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Abstract
A drive circuit for controlled edge power elements is described. In one embodiment the drive circuit for controlled edge power elements comprises: a first integrating circuit having a first input suitable for receiving in input a first drive signal; an integrating capacitor coupled to said integrating circuit; a first power element driven by said first integrating circuit and suitable for driving a load, said load having a first terminal. The said first integrating circuit includes a first current amplifier and said integrating capacitor is coupled between said first input and a predetermined reference voltage.
Claims23
Drive circuit for controlled edge power elements comprising:
- a first integrating circuit having a first input suitable for receiving in input a first drive signal;
- an integrating capacitor coupled between said first input of said first integrating circuit and a predetermined reference voltage;
- and
- a first power element driven by said first integrating circuit and suitable for driving a load, said load having a first terminal;
- wherein
- said first integrating circuit includes a first current amplifierthat includes:
- an input branch having a first input for receiving the first drive signal and a second input coupled to the load;
- an output branch coupled to said input branch;
- and
- a bias branch suitable for biasing said input branch;
- wherein said input branch comprises a switch commanded by a bias voltage supplied by said bias branch so as to block current flowing in said input branch and consequently current flowing in said output branch when a voltage applied to said first input of the input branch is null.
A drive circuit for controlled edge power elements, comprising:
- a first power element coupled between a first voltage reference and a first terminal of a load, the first power element having a control terminal;
- a first current amplifier having a first input, a second input, and an output, the second input being coupled to the first terminal of the load and the output being coupled to the control terminal of the first power element;
- an integrating capacitor having a first terminal coupled to the first input of the first current amplifier and a second terminal coupled to a second reference voltage
- a second power element coupled between the first terminal of the load and the second reference voltage, the second power element having a control terminal;
- and
- a second current amplifier having a first input coupled to the second terminal of the capacitor, a second input coupled to the second voltage reference, and an output coupled to the control terminal of the second power element.
A drive circuit for controlled edge power elements, comprising:
- a first power element coupled between a first voltage reference and a first terminal of a load, the first power element having a control terminal;
- and
- a first current amplifier that includes:
- a first current generator having first and second terminals, the first terminal being coupled to the first voltage reference;
- a first input switch coupled between the first voltage reference and a first input node, and having a control terminal;
- a first output switch coupled between the first voltage reference and the control terminal of the first power element, and having a control terminal;
- a first control switch coupled to the first input node and to the control terminals of the input and output switches, the first control switch having a control terminal coupled to the second terminal of the first current generator
- an integrating capacitor having a first terminal coupled to the first input node and a second terminal coupled to a second reference voltage;
- a second power element coupled between the first terminal of the load and a second reference voltage, the second power element having a control terminal;
- and
- a second current amplifier having a first input coupled to the second terminal of the capacitor, a second input coupled to the second voltage reference, and an output coupled to the control terminal of the second power element.
Dependencies are inferred from the claim text.