Driving circuit for an electric load and electric system comprising the circuit
First Claim
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1. A driving circuit comprising:
- a node configured to be coupled to a load;
a further node configured to be coupled to the load;
an H-bridge circuit switchable between an activation mode and a deactivation mode and comprisinga first transistor having a first terminal coupled to said node and to be coupled to the load,a second transistor coupled in series with said first transistor and having a second terminal coupled to said node,a third transistor having a third terminal coupled to said further node, anda fourth transistor coupled in series with said third transistor and having a fourth terminal coupled to said further node;
a current generator having an output coupled to said node, said current generator being configured to be enabled to generate a current at least when said H-bridge circuit is deactivated; and
a comparator configured to compare a voltage of said node to a reference voltage and generate a comparison signal based thereon.
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Abstract
An electronic circuit includes a node coupled to a load to be driven, and a power device, which can be switched between activation and deactivation and coupled to the node. The circuit further includes a current generator having an output connected to the node and that can be enabled to generate current at least when the power device is deactivated. The circuit also includes a comparator for comparing an electric voltage of the node with a reference voltage and is configured to generate a comparison signal based thereon.
7 Citations
32 Claims
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1. A driving circuit comprising:
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a node configured to be coupled to a load; a further node configured to be coupled to the load; an H-bridge circuit switchable between an activation mode and a deactivation mode and comprising a first transistor having a first terminal coupled to said node and to be coupled to the load, a second transistor coupled in series with said first transistor and having a second terminal coupled to said node, a third transistor having a third terminal coupled to said further node, and a fourth transistor coupled in series with said third transistor and having a fourth terminal coupled to said further node; a current generator having an output coupled to said node, said current generator being configured to be enabled to generate a current at least when said H-bridge circuit is deactivated; and a comparator configured to compare a voltage of said node to a reference voltage and generate a comparison signal based thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrical system comprising:
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a load; a driving circuit coupled to said load and comprising a node coupled to said load, a further node coupled to said load; an H-bridge circuit switchable between an activation mode and a deactivation mode and comprising a first transistor having a first terminal coupled to said node and said load, a second transistor coupled in series with said first transistor and having a second terminal coupled to said node, a third transistor having a third terminal coupled to a further node, and a fourth transistor coupled in series with said third transistor and having a fourth terminal coupled to said further node, a current generator having an output coupled to said node, said current generator being configured to be enabled to generate a current at least when said H-bridge circuit is deactivated, and a comparator configured to compare a voltage of said node to a reference voltage and generate a comparison signal based thereon. - View Dependent Claims (13, 14, 15)
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16. A method of using a driving circuit comprising:
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enabling a current generator to generate a current at an output coupled to a node when an H-bridge circuit switchable between an activation mode and a deactivation mode is deactivated, the H-bridge circuit comprising a first transistor having a first terminal coupled to the node and a load, a second transistor coupled in series with the first transistor and having a second terminal coupled to the node, a third transistor having a third terminal coupled to a further node to be coupled to the load, and a fourth transistor coupled in series with the third transistor and having a fourth terminal coupled to the further node; comparing a voltage at the node to a reference voltage; and generating a comparison signal based upon the comparison. - View Dependent Claims (17, 18)
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19. A driving circuit comprising:
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a node configured to be coupled to a load to be driven; a power device switchable between an activation mode and a deactivation mode and coupled to said node, said power device comprising a power transistor having a control terminal; a current generator having an output coupled to said node, said current generator being configured to be enabled to generate a current at least when said power device is deactivated; a comparator configured to compare a voltage of said node to a reference voltage and generate a comparison signal based thereon; and a driving controller coupled to said control terminal and configured to generate a driving voltage for said power device in accordance with a pulse width modulation (PWM) technique based on a driving enabling signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of using a driving circuit comprising:
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enabling a current generator to generate a current at a node when a power device switchable between an activation mode and a deactivation mode is deactivated, the power device comprising a power transistor having a control terminal; comparing a voltage at the node to a reference voltage; generating a comparison signal based upon the comparison; and generating a driving voltage for the power device using a driving controller coupled to the control terminal, the driving voltage being generated in accordance with a pulse width modulation (PWM) technique based on a driving enabling signal. - View Dependent Claims (30, 31, 32)
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Specification