To improve the temperature effect on the current source circuit, a novel high precision temperature--independent current source architecture was presented.A small aluminium resistor is added into reference current source circuit of the original major circuit, its influence on temperature range -50℃ to 150℃ can be limited to 1%～2%. The small resistor can be layouted on the spare area of the chip, so the cost of the Integrate Circuit(IC) will not increase. No chip power consumption caused by the resistor will be increased because the resistor works in a constant current source circuit.%为了改进电流源电路的温度特性,提出了一种对温度不敏感的高精度电流源的实现方案.与现有的电路相比,本电路并没有改变原来的主电路结构,而仅仅在参考电流源中增加了一个小电阻.它在零下50℃到150℃的大范围内的温度效应被限制在1%-2%.该电阻在芯片上是利用闲置区域布线的,因此并不会增加集成电路的制造成本.另外,该电阻是连接在恒流源中,不会增加芯片的功耗.
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