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引用次数: 3
摘要
介绍了一种用于降压变换器的0.6 /spl μ m CMOS集成数字PID控制器。它包括:(1)一个VCO驱动计数器作为ADC;(2)采用可变积分时间的PID补偿器，以提高精度和稳定性;(3)带有改进抽头延迟线的双频开关PWM发生器，以提高输出分辨率和面积效率。转换器的开关频率为1mhz，当阶跃变化为1v时，跟踪时间为50 /spl mu/s。
An integrated digital controller for DC-DC switching converter with dual-band switching
A 0.6 /spl mu/m CMOS integrated digital PID controller for a buck converter is presented. It consists of: (1) a VCO driving a counter to serve as an ADC; (2) a PID compensator that employs variable integration times for enhancing accuracy and stability, and (3) a dual-band switching PWM generator with a modified tapped delay line for better output resolution and area efficiency. The converter switches at 1 MHz, while the tracking time is 50 /spl mu/s for a step change of 1 V.
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