dc offset meaning in English
直流偏移
Examples
- 3 dc offset set to 0 v
3直流偏置设置为0v - 5 ) the system ' s sensitivity and snr can be improved by the method of balancing the standing capacitance using dc offset compensation
采用直流反馈补偿的方法消除电容传感器极板间的静态电容，提高了系统的分辨率和信噪比。 - Second , the results of theory analysis and simulation research show that the output of one cycle controlled bridge switching power amplifier have dc offset because of the nonideal characteristic of reset signal . the magnitude of output dc offset voltage is proportional to width of reset pulse . a voltage compensation technique is used to solve this question , and the computation formula of compensation voltage is gived . the circuit compensated and not are researched through simulation and experiment , which results show that compensated circuit solve the output dc offset effectively
其次，理论分析和仿真研究结果表明，由于复位脉冲的非理想特性，单周控制的全桥开关功率放大器输出端存在直流偏置问题，其大小与复位脉冲的宽度成正比。针对输出直流偏置问题，提出了电压补偿的改进方案，给出了补偿电压的具体计算公式。对补偿前和补偿后的方案进行了对比仿真研究和实验研究。 - The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band . firstly , this paper clarifies the theory of i / q modulation , elaborates evm and acpl , and analyzes the effect of amplitude and phase unbalance and dc offset on evm . secondly we review the basic principle of phase locked loop and it ’ s composing parts , including the basic conception and design method of pll frequency synthesizer , especially introduce the charge pump pll frequency synthesizer in detail
首先,在阐述i / q正交调制基本原理的基础上,通过对误差矢量和邻近信道功率泄漏的详细分析,定性、定量地讨论了各种非理想电路因素(如相位不平衡、幅度不平衡、直流偏差等)对调制器性能的影响;其次,介绍了锁相环的工作原理和基本组成部分,包括锁相环的设计和环路滤波器的设计,特别详述了电荷泵锁相频率源;第三,介绍了采用直接调制技术模拟卫星信号的射频前端的设计;最后,对整个直接射频调制系统进行测试,结果基本上达到了课题要求。 - At last , control circuit of one cycle controlled bridge switching power amplifier is improved with the basic idea of one cycle control . the simulation results show that the amplifier of improved control circuit not only solve the question of output dc offset , but also keep the voltage gain lowered by voltage compensation technique
最后，根据单周控制的基本思路，改进了单周控制的全桥开关功率放大器的控制电路。仿真结果表明，改进控制电路后的系统不但解决了输出直流偏置问题，而且解决了电压补偿方法所造成的放大器增益下降问题。