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针对跳频电台频率综合器中电源高精度的要求而设计了一款低温度系数、低电源电压的带隙基准电压源电路。采用TSMC 0.18μm射频CMOS工艺条件,利用Candence仿真工具对该电路图进行仿真,版图参与TSMC 0.18μm CMOS工艺的MPW多项目晶圆流片,在室温27℃和电源电压为1.8 V的测试条件下,带隙基准电压源输出电压温度系数仅为3.6×10-6 V/℃,即所设计的带隙基准电压源完全能满足高精度低电源电压系统中正常工作的要求。
A frequency bandgap reference circuit with low temperature coefficient and low supply voltage is designed for the requirement of high precision power supply in the frequency synthesizer of frequency hopping radio. The TSMC 0.18μm RF CMOS process conditions, the use of Candence simulation tool to simulate the circuit diagram, the layout involved in the TSMC 0.18μm CMOS MPW multi-project wafer chip, at room temperature 27 ℃ and the supply voltage of 1.8 V test conditions, Bandgap voltage reference output voltage temperature coefficient of only 3.6 × 10-6 V / ℃, the design of the bandgap reference voltage source can fully meet the requirements of high-precision low-voltage power supply system.