A Consecutively Adjustable and High Stable DC Voltage Source with PWM Chopped Modulator
WANG Gang1,3, LAN Jiang2,3, CHEN Le1, LI Zheng-kun3, WANG Nong4
1. China Jiliang University, Hangzhou, Zhejiang 310018, China;
2. Tsinghua University, Beijing 100084, China;
3. National Institute of Metrology, Beijing 100013, China;
4. College of Quality and Supervisor Technology, Hebei University, Baoding, Hebei 071002, China
Abstract：A continuously adjustable high stable DC voltage reference based on subsurface Zener reference LTZ1000A is presented and PWM technique is adopted to output voltages between 0～10 V. With selecting high precise resistors and using appropriate measures to insulate and isolate,the short-time relative stability of 7 V output voltage provided by LTZ 1000 is 1.7×10-8.The voltage of 10 V is increased up by a network,composed by high precise resistors with the same temperature coefficient,and its short-time relative stability is 2.4×10-8. The voltage of 0~10 V generated by PWM technique and suitable DC-DC conversion-filter circuit are measured and the short term relative stabilities are about 10-7.
王刚,兰江,陈乐, 李正坤,王农. 一种脉宽调制的高稳定连续可调直流电压源[J]. 计量学报, 2014, 35(2): 169-172.
WANG Gang, LAN Jiang, CHEN Le, LI Zheng-kun, WANG Nong. A Consecutively Adjustable and High Stable DC Voltage Source with PWM Chopped Modulator. Acta Metrologica Sinica, 2014, 35(2): 169-172.
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2014, Vol. 35 
