Patent ID: 7265608

Claim:
A current mode trimming apparatus for trimming a desired current, comprising: a first transistor, wherein a current passing through the first transistor is the desired current; a first resistor connected with the first transistor in series between a first voltage and a second voltage; an operational amplifier, having a first input end receiving a reference voltage, a second input end electrically connected to a common node between the first resistor and the first transistor, and an output end electrically connected to a gate of the first transistor; a first controlled current source, electrically connected between the common node and the first voltage, for providing a first current and adjusting the first current in accordance with a received first trimming data thereof; and a second controlled current source, electrically connected between the common node and the second voltage, for providing a second current and adjusting the second current in accordance with a received second trimming data thereof.