A new method,namely multiple point curvature compensation （MPCC）,is proposed for the design of a bandgap reference,and its design principles, theoretical derivation, and one feasible circuitry implementation are pre...A new method,namely multiple point curvature compensation （MPCC）,is proposed for the design of a bandgap reference,and its design principles, theoretical derivation, and one feasible circuitry implementation are presented. Being different from traditional techniques, this idea focuses on finding multiple temperatures in the whole range at which the first order derivatives of the output reference voltage equal zero. In this way, the curve of the output reference voltage is flattened and a better effect of curvature compensation is achieved. The circuitry is simulated in ST Microelectronics 0. 18μm CMOS technology, and the simulated result shows that the average temperature coefficient is only 1ppm/℃ in the range from - 40 to 125℃.展开更多
中波调幅发射机发生包络输出信号畸变时,将引起传送的广播节目出现失真、可听度下降等问题。为避免以上情况的发生,DAM-10 k W中波发射机设计了完备的包络检测电路,一旦发射机出现较为严重的包络畸变,该电路能及时提醒值班人员采取措施...中波调幅发射机发生包络输出信号畸变时,将引起传送的广播节目出现失真、可听度下降等问题。为避免以上情况的发生,DAM-10 k W中波发射机设计了完备的包络检测电路,一旦发射机出现较为严重的包络畸变,该电路能及时提醒值班人员采取措施,确保安全播出。展开更多
文摘A new method,namely multiple point curvature compensation （MPCC）,is proposed for the design of a bandgap reference,and its design principles, theoretical derivation, and one feasible circuitry implementation are presented. Being different from traditional techniques, this idea focuses on finding multiple temperatures in the whole range at which the first order derivatives of the output reference voltage equal zero. In this way, the curve of the output reference voltage is flattened and a better effect of curvature compensation is achieved. The circuitry is simulated in ST Microelectronics 0. 18μm CMOS technology, and the simulated result shows that the average temperature coefficient is only 1ppm/℃ in the range from - 40 to 125℃.
