| 主权项 |
1. A current source, for driving a Metal Oxide Semiconductor (MOS) circuit to generate a predetermined current, the current source comprising:
a feedback circuit, comprising:
a second MOS transistor, comprising:
a first end, coupled to a voltage source;a control end; anda second end, coupled to the control end of the second MOS transistor;a third MOS transistor, comprising:
a first end, coupled to the voltage source;a control end, coupled to the control end of the second MOS transistor; anda second end;a fourth MOS transistor, comprising:
a first end, coupled to the second end of the third MOS transistor, for outputting a feedback voltage;a control end, for receiving a control voltage; anda second end; anda fifth MOS transistor, comprising:
a first end, coupled to the second end of the second MOS transistor;a control end, for outputting an output voltage, wherein the output voltage is equal to the control voltage; anda second end;a first resistor, coupled between the ground end and the control end of the fifth MOS transistor; andthe MOS circuit, comprising a plurality of MOS transistors connected in series;
a first end of a sixth MOS transistor of the plurality of MOS transistors connected in series being coupled to the voltage source;a control end of each of the plurality of MOS transistors being directly coupled to the first end of the fourth MOS transistor, and controlled by the feedback voltage; anda second end of a seventh MOS transistor of the plurality of MOS transistors connected in series being coupled to the control end of the fifth MOS transistor;wherein the output voltage of the control end of the fifth MOS transistor is not influenced by series source/drain voltages of the plurality of MOS transistors, and a decrease of the feedback voltage is dependent on an equivalent channel length of the plurality of MOS transistors, not dependent on a process of the plurality of MOS transistors or a threshold voltage of the sixth MOS transistor. |
