Driver having low power consumption and method thereof
AssigneeIPGoal Microelectronics (SiChuan) Co., Ltd.
InventorFangping Fan
Life of this patent
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Abstract
A driver having low power consumption includes a first input terminal, a second input terminal, an output terminal, a power supply terminal, a ground terminal, a driving circuit, an adjusting circuit connected to the driving circuit and a biasing circuit which is connected to the driving circuit and the adjusting circuit. A method for accomplishing low power consumption of a driver is also provided. The method accomplishes an object of low power consumption by dynamically adjusting a driving current of a driver according to a difference between inputted differential signals.
Claims11
A driver having low power consumption, comprising a first input terminal, a second input terminal, an output terminal, a power supply terminal, a ground terminal, a driving circuit which is connected to said first input terminal, said second input terminal, said output terminal, said power supply terminal and said ground terminal, an adjusting circuit which is connected to said driving circuit, said power supply terminal and said ground terminal, and a biasing circuit which is connected to said driving circuit, said adjusting circuit, said power supply terminal and said ground terminal;
- wherein said driving circuit comprises a first FET connected to said first input terminal, a second FET connected to said second input terminal, a third FET which is connected to said first FET and said second FET, a fourth FET connected to said first FET, a fifth FET connected to said second FET, a sixth FET connected to said fourth FET, a seventh FET connected to said fifth FET, an eighth FET connected to said sixth FET and a ninth FET connected to said seventh FET;
- said adjusting circuit comprise a tenth FET connected to said sixth FET, an eleventh FET connected to said tenth FET, a twelfth FET connected to said tenth FET, a first current source connected to said tenth FET, a thirteenth FET connected to said eleventh FET, and a second current source connected to said eleventh FET;
- and said biasing circuit comprises a fourteenth FET which is connected to said twelfth FET and said thirteenth FET, a fifteenth FET connected to said fourteenth FET, and a third current source connected to said fourteenth FET.
A method for accomplishing low power consumption of a driver, comprising a step of:
- providing a device comprising a first input terminal, a second input terminal, an output terminal, a power supply terminal, a ground terminal, a driving circuit which is connected to the first input terminal, the second input terminal, the output terminal, the power supply terminal and the ground terminal, an adjusting circuit which is connected to the driving circuit, the power supply terminal and the ground terminal, and a biasing circuit which is connected to the driving circuit, the adjusting circuit, the power supply terminal and the ground terminal;
- further comprising steps of:
- inputting a pair of differential signals into the driving circuit by the first input terminal and the second input terminal;
- amplifying the differential signals which are inputted by the first input terminal and the second input terminal and sending the differential signals into the output terminal by the driving circuit;
- adjusting a driving current of the driving circuit according to a difference between the differential signals inputted by the first input terminal and the second input terminal by the adjusting circuit;
- and processing the driving circuit with DC biasing by the biasing circuit;
- wherein, when the first input terminal and the second input terminal have identical voltage value, a current of a first current source totally runs through a tenth FET and a current of a second current source totally runs through an eleventh FET;
- no current runs through a twelfth FET and a thirteenth FET;
- herein a current running through a third FET is a current of a third current source and thus the current of the third current source is the driving current of the driving circuit;
- and the driving circuit amplifies the differential signals according to the driving current provided by the adjusting circuit and then sends the differential signals into the output terminal.
Dependencies are inferred from the claim text.