Drive control circuit
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsYuichi Sawahara, Hideaki Majima
Life of this patent
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Abstract
According to one embodiment, a drive control circuit includes a first transistor that supplies a current to a gate of an output transistor in response to a drive signal, a second transistor that supplies a current to a capacitor in response to the drive signal, a comparison circuit that compares a gate voltage of the output transistor and a voltage of the capacitor, a control signal generation circuit that generates a control signal in response to an output signal of the comparison circuit and the drive signal, and a third transistor that supplies a current to a gate of the output transistor in response to the control signal.
Claims20
A drive control circuit, comprising:
- a first drive transistor that supplies a drive current to a gate of an output transistor in response to a drive signal;
- a first capacitor where a reference potential is applied to one end thereof;
- a second drive transistor that supplies a charging current to another end of the first capacitor in response to the drive signal;
- a first comparison circuit that compares a gate voltage of the output transistor and a voltage of the another end of the first capacitor and outputs a first detection signal based on a comparison result thereof;
- a first control signal generation circuit that generates a first control signal in response to the first detection signal and the drive signal;
- and
- a third drive transistor that supplies a drive current to the gate of the output transistor in response to the first control signal.
A drive control circuit, comprising:
- a drive circuit that outputs a drive signal;
- a first drive transistor that supplies a drive current to a gate of an output transistor in response to the drive signal;
- a first capacitor where a reference potential is applied to one end thereof;
- a second drive transistor that supplies a charging current to another end of the first capacitor in response to the drive signal;
- a first comparison circuit that compares a gate voltage of the output transistor and a voltage of the another end of the first capacitor and outputs a first detection signal based on a comparison result thereof;
- a first control signal generation circuit that generates a first control signal in response to the first detection signal and the drive signal;
- and
- a third drive transistor that has a drive capability that is higher than that of the first drive transistor and supplies a drive current to the gate of the output transistor in response to the first control signal.
A drive control circuit, comprising:
- a drive circuit that outputs first and second drive signals;
- a first drive transistor that supplies a drive current to a gate of an output transistor in response to the first drive signal;
- a first capacitor where a reference potential is applied to one end thereof;
- a second drive transistor that supplies a charging current to another end of the first capacitor in response to the first drive signal;
- a first comparison circuit that compares a gate voltage of the output transistor and a voltage of the another end of the first capacitor and outputs a first detection signal based on a comparison result thereof;
- a first control signal generation circuit that generates a first control signal in response to the first detection signal and the first drive signal;
- a third drive transistor that has a drive capability that is higher than a drive capability of the first drive transistor and supplies a drive current to a gate of the output transistor in response to the first control signal;
- a second capacitor where the reference potential is applied to one end thereof;
- a fourth drive transistor that supplies a charging current to another end of the second capacitor in response to the first drive signal;
- a second comparison circuit that compares a gate voltage of the output transistor and a voltage of the another end of the second capacitor and outputs a second detection signal depending on a comparison result thereof;
- a second control signal generation circuit that generates a second control signal in response to the second detection signal and the first drive signal;
- and
- a fifth drive transistor that has a drive capability that is higher than a drive capability of the first drive transistor and supplies a drive current to the gate of the output transistor in response to the second control signal.
Dependencies are inferred from the claim text.