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- Abstract: In this paper, we describe the design and function, application of the power unit controller for mini RF excited CO2 laser, pulse width modulation (PWM) is the convenient way to vary the laser average output power from 1%to 100%of maximum. 文摘:述了小型RF激励CO2激光器的功率控制器设计、功能和应用,根据脉宽调制原理可以方便地把激光功率从1%25变化到100%25。
- Pulse width modulator and sample maintenance installment. 脉冲宽度调制器和取样保持装置。
- Pulse Width Decoder-A Flxxible Application of Integrated Analog Switch CMOS. CMOS集成模拟开关的变通应用-脉宽解码器。
- The TXL readout pulse may have the same pulse width as the TXS readout pulse. 转移电晶体TXL可具有与转移电晶体TXS相同的读出脉波宽度。
- When the rf pulse is combined with magnetic field gradients, a spatially encoded signal is produced that can be detected and translated into images. 当射频脉冲与磁场梯度联合起来时,我们可以探测到一个空间编码信号的产生并且将它转变成图像。
- Pulse width modulation (PWM) is an analog signal level for digital encoding. 脉冲宽度调制(PWM)是一种对模拟信号电平进行数字编码的方法。
- In these nonuniform fields the coil voltage caused by the excitation of an RF pulse rapidly decays to zero, but it can be recovered some time later by applying a second pulse. 在不均匀磁场内,射频脉冲导致的电波很快会消失,但如果隔一段时间后再提供第二次脉冲,又会重新出现。
- Position control of d. c. motors has been done by means of pulse width modulation. 直流电机位置用脉冲宽度调制法控制。
- The control mode has developed from early U\f control mode to vector control technology and pulse width modulation. 控制方式也从早期的电压;频率控制方式发展到向量控制技术和冲宽度调制技术。
- For example, when a surface coil is used to transmit a rectangular RF pulse into a uniform water phantom, the amplitude of the B1field can vary by several-fold across the imaged object. 比方说,当一个表面线圈向均匀的水介质发射矩形射频脉冲的时候,B1 场的振幅有可能在成像物体的不同部位发生很大的差异。
- High-speed on-off valves are used and controlled with pulse width modulation (PWM) in this system. 系统应用高速开关阀,用脉宽调制(PWM)的方法进行控制。
- The inverse control method for pulse width modulation (PWM) inverter-fed induction motors is discussed. 摘要针对电压源型逆变器供电的感应电动机,应用逆系统理论提出了一种新型控制策略。
- And a trapezoidal pulse voltage source with the pulse width nearly equal to the line delay. 因负载端去耦合电容含线头电感所产生之效应。
- The wider the pulse width, the narrower the band width in the spectrum and vise versa. 脉波之波宽越宽,其频谱之频宽越窄,反之亦亦然。脉波迴旋积之次数越多,其结果越近似于高斯波形。
- It can also simulate the speed about distance changing and adjust the pulse width of echo signal. 此外,本目标回波距离处理器还可以仿真距离变化速率,调节回波脉冲的宽度。
- Therefore, we use unipolar switching pulse width modulation scheme to realize a filterless Class-D power amplifier. 因此,我们利用单极性切换脉波宽度调变技术去实现无滤波器之D类放大器。
- The result has dedicated that it could satisfy the process of PECM in high frequency,narrow pulse width and high-power. 实验结果表明,这种高频脉冲电源在高频、窄脉宽、大功率等方面均能满足该工艺的要求。
- The relation between the FWHM pulse width and the root-mean square (RMS) pulse width is studied in theory. 利用理论推导的方法,给出了超短洛仑兹脉冲均方根脉冲宽度与半高全宽脉冲宽度的关系式。
- Under the same heating voltage and pulse width, a larger width of the microheater led to faster bubble growth. 加热条件相同的前提下,微加热元宽度越大,气泡成核所需的时间越短、微气泡生长速率越快;
- Studies on the Compression of Electrooptical Q-switched Cr:LiSAF Laser Pulse Width by SBS Phase Conjugator[J]. 引用该论文 葛传文;张为俊;陈长水;王沛;陶德杰;苏红.