Low voltage bandgap reference with closed loop curvature compensation

【摘要】 A new low-voltage CMOS bandgap reference(BGR) that achieves high temperature stability is proposed.It feeds back the output voltage to the curvature compensation circuit that constitutes a closed loop circuit to cancel the logarithmic term of voltage VBE.Meanwhile a low voltage amplifier with the 0.5 μm low threshold technology is designed for the BGR.A high temperature stability BGR circuit is fabricated in the CSMC 0.5 μm CMOS tech-nology.The measured result shows that the BGR can operate down to 1 V,while the temperature coefficient and line regulation are only 9 ppm/℃ and 1.2 mV/V,respectively.更多还原

【Abstract】 A new low-voltage CMOS bandgap reference(BGR) that achieves high temperature stability is proposed.It feeds back the output voltage to the curvature compensation circuit that constitutes a closed loop circuit to cancel the logarithmic term of voltage VBE.Meanwhile a low voltage amplifier with the 0.5 μm low threshold technology is designed for the BGR.A high temperature stability BGR circuit is fabricated in the CSMC 0.5 μm CMOS tech-nology.The measured result shows that the BGR can operate down to 1 V,while the temperature coefficient and line regulation are only 9 ppm/℃ and 1.2 mV/V,respectively.更多还原