與電源電壓無關之電流源

Supply Voltage Independent of Current Sources

顧彥斌(Yen-Bin Gu) ； 葉盛豐(Sheng-Feng Yueh)

《高雄師大學報》 16期 (2004/06) Pp. 403-414

https://doi.org/10.7060/KNUJ.200406.0403

摘要

這篇論文提出了一個和電源電壓變動無關的新式電流源。這個新的電流源不須使用電阻，並且由兩個成份所組成。第一個部份具有正電源電壓係數，即電源電壓變大，電流隨之增加；第二個部份具有負電源電壓係數，即電源電壓變大，電流反而減少。這兩個成份組合起來可以抵消因電源電壓變動所造成的電流變動。由小訊號分析可推導出正電源電壓係數和負電源電壓係數的公式。利用 HSPICE 模擬軟體可以證明在電源電壓 2.5～3.5V 間，電流源和電源電壓的變動無關。

關鍵字

電流源 ； 正電源電壓係數 ； 負電源電壓係數

並列摘要

This paper presents a novel current source which is insensitive to supply voltage. The presented current source without resistor is composed of two components. The first component possesses a positive supply voltage coefficient and the second component has a negative supply voltage coefficient. These two components are combined to cancel the variation of the current due to the change of supply voltage. A small signal analysis is presented to derive the positive and negative coefficients. Based on the HSPICE simulation, this current source is proves to be insensitive to supply voltage from 2.5 V to 3.5 V.

並列關鍵字

Current source ； Positive supply voltage coefficient ； Negative supply voltage coefficient