Based on TSMC 0.18-μm CMOS process and traditional current source structure, a novel startup CMOS low-power current source is designed. The startup circuit uses only one depletion-type MOS tube, which reduces the current consumed by the startup part to zero after the circuit works normally. This structure not only reduces the power consumption of the entire circuit, but also greatly saves the chip area. Keywords:current source startup circuit depletion-mode MOSFET low power
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