Driving circuit, driving module, and motor driving apparatus
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsChang Jae HEO, Sung Man PANG
Life of this patent
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Abstract
There is provided a driving circuit including: a signal delay unit including a first delay unit delaying a high level input signal in a case in which an input signal has a high level, and a second delay unit delaying a low level input signal when the input signal has a low level; a signal output unit including first and second transistors connected to the first and second delay units and performing a switching operation under the control of the first and second delay units, respectively; and an output holding unit maintaining an output voltage at a level equal to that immediately before the first and second transistors are turned off, when the first and second transistors are simultaneously turned off.
Claims21
A driving circuit comprising:
- a signal delay unit including a first delay unit delaying a high level input signal in a case in which an input signal has a high level, and a second delay unit delaying a low level input signal when the input signal has a low level;
- a signal output unit including first and second transistors connected to the first and second delay units and performing a switching operation under the control of the first and second delay units, respectively;
- and
- an output holding unit maintaining an output voltage at a level equal to that immediately before the first and second transistors are turned off, when the first and second transistors are simultaneously turned off.
A driving circuit comprising:
- a first inverter inverting an input signal;
- a first delay unit delaying a first signal received from the first inverter until a voltage of a first capacitor reaches a level equal to or higher than a pre-set high level;
- a second delay unit delaying a second signal received from the first inverter until when a voltage of a second capacitor is discharged to have a level lower than a pre-set low level;
- a signal output unit including first and second transistors connected to the first and second delay units and performing a switching operation under the control of the first and second delay units, respectively;
- and
- an output holding unit maintaining an output voltage at a level equal to that immediately before the first and second transistors are turned off when the first and second transistors are simultaneously turned off.
A driving module comprising:
- at least one driving circuit including a signal delay unit including a first delay unit delaying a high level input signal in a case in which an input signal has a high level, and a second delay unit delaying a low level input signal when the input signal has a low level, a signal output unit including first and second transistors connected to the first and second delay units and performing a switching operation under the control of the first and second delay units, respectively, and an output holding unit maintaining an output voltage at a level equal to that immediately before the first and second transistors are turned off, when the first and second transistors are simultaneously turned off;
- and a switching unit having a semiconductor element switched on and switched off according to a driving signal from the at least one driving circuit.
A motor driving apparatus comprising:
- a driving circuit group including a plurality of driving circuits each including a signal delay unit including a first delay unit delaying a high level input signal in a case in which an input signal has a high level, and a second delay unit delaying a low level input signal when the input signal has a low level, a signal output unit including first and second transistors connected to the first and second delay units and performing a switching operation under the control of the first and second delay units, respectively, and an output holding unit maintaining an output voltage at a level equal to that immediately before the first and second transistors are turned off, when the first and second transistors are simultaneously turned off;
- and
- an inverter driving a motor by using inverter arms included therein, each of the inverter arms having a semiconductor element switched on or switched off according to driving signal from each of the plurality of driving circuits of the driving circuit group.
Dependencies are inferred from the claim text.