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Parallel Operation Characteristics Analysis of Sewage Source Heat Pump Units in Winter 被引量:2
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作者 庄兆意 张承虎 +1 位作者 王海燕 孙德兴 《Transactions of Tianjin University》 EI CAS 2010年第6期461-466,共6页
Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running... Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running in high efficiency. A mathematical model determining COP, evaporation temperature and condensation temperature of a single unit was proposed. Under the condition of uniform load distribution, the model was established according to different ways of bearing partial load with the same type multi... 展开更多
关键词 sewage source heat pump unit coefficient of performance (COP) partial load parallel operation
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10Gb/s transmit equalizer using duobinary signaling over FR4 backplane 被引量:1
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作者 张银行 Hu Qingsheng 《High Technology Letters》 EI CAS 2017年第3期266-270,共5页
A 10Gb/s 6-tap transmit equalizer based on partial response signaling for high speed backplane transmission is presented. By combining features of equalizer and frequency-dependent channel,duobinary signaling can be g... A 10Gb/s 6-tap transmit equalizer based on partial response signaling for high speed backplane transmission is presented. By combining features of equalizer and frequency-dependent channel,duobinary signaling can be generated at the output of FR4 backplane,aiming at increasing data rate while reducing design complexity. Based on 0.18μm CMOS technology,this equalizer has been designed and fabricated,in which both variable capacitor and load resistor calibration techniques are explored to eliminate the effect of process variations. The chip occupies 0.68×0.8mm^2 including I/O pads and consumes a power of 194 mW with 1.8V power supply. Measurement results show that a typical 3-level eye diagram can be obtained at the receiver and the equalizer can work properly at the data rate of 10Gb/s. 展开更多
关键词 transmit equalizer duobinary partial response load resistor calibration CMOS technology
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