基于TSMC 0.18-μm CMOS 工藝，根據傳統電流源結構，設計了一種新穎啟動方式的CMOS 低功耗電流源。啟動電路僅采用一個耗盡型MOS 管，使電路正常工作后啟動部分消耗的電流基本降為零。這種結構不僅降低了整個電路的功耗，而且大大節省芯片的面積。
關鍵詞：電流源 啟動電路 耗盡管 低功耗

A Low Power CMOS Current Source with Novel Startup Circuit CHEN Si1, YANG Zengwang1, YUN Tinghua2 (1.XZNormal University, Xuzhou Jiangsu, 221116, China 2. Wiscomm Microsystems inc, Shanghai, 200433, China) Abstract： A low power CMOS current source with novel start circuit is designed based on the TSMC 0.18-μm CMOS process. The startup circuit only uses a depletion-mode MOSFET. It can make the startup current decrease to zero. The designed novel current circuit can not only reduce the whole circuit power but also greatly save the area of the chip.
Key words：current source startup circuit depletion-mode MOSFET low power