2008•Electronics & PackagingRequires access
A High PSRR Curvature Compensation Bandgap Reference
Chao Shi
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Abstract
In the tradition of the typical CMOS band gap voltage reference circuit analysis based on a high precision and high power supply rejection band gap voltage reference. Second order curvature compensation technology, use of pre-circuit voltage adjustment circuit, as the base circuit to provide a stable power supply, improve the power supply rejection ratio, while enhancing the accuracy of balance of the power supply rejection ratio, the entire circuit using a standard CMOS process to achieve CSMC 0.5μm , A spectre for simulation, the simulation showed that when the temperature of -40℃~ 80℃, the benchmark output voltage is less than 1 mV, temperature coefficient of 3.29 × 10-6℃, when the low-frequency(1 kHz)of the power supply rejection ratio of 75 dB, the benchmark circuit Above the 3.3 V power supply can be stabilized, with good performance