等效电容

Its leakage current is lower than 5nA at room temperature. The quantum efficiency in the wavelength range of 400-500nm is about 83%. The junction capacity is about 110-120pF. The noise level of PIN+PreAmp system is lower than 527e at -25C. The PIN diodes have passed the long-term stability test. All the main performances of our PIN diodes meet the requirement of ALICE/PHOS,and some of them are even better.

本工作研制的PIN硅光电二极管的灵敏区面积为16x17mm2，常温漏电流小于5nA，紫光区量子效率约为83%，结电容为110-120pF，以及由PIN光电二极管与电荷灵敏前置放大器组成的读出系统的噪声水平在-25℃下小于527个等效噪声电荷，并经过了长期性能稳定性的考验。

ABSTRACT : Based on the general circuit model of inter-phase power controller, the basic relationship of steady-state voltage of IPC is analyzed in this paper. Consequently a new concept is proposed to describe the basic feasible region of steady-state voltage of tuned IPC and its basic forms is defined under the conditions of tuned parameters. On the basis of aforementioned work, the respective regions in case of equivalent load in receiving end, susceptance of inductor and capacitor and parameters of phase shifter meeting the requirements of basic feasible region of voltage is mainly analyzed. Finally, the differences of feasible region of various TIPC with simulations are given.

首先，基于相间功率控制器的通用电路模型，分析了IPC稳态电压的基本关系；其次，针对参数共轭条件，提出并定义了调谐型IPC正常稳态运行电压基本可行域的概念及其基本形式，并在此基础上，重点解析了受端等效负荷、电容和电感的电纳、移相环节参数在满足电压基本可行域的前提下各自应该界定的基本可行域；最后，通过典型TIPC的仿真分析，说明了不同TIPC在基本可行域方面存在的差异。

This compensation circuit can make the stability of the LDO linear regulator undependent on the effect of load capacitor's equivalent serial resistance, and it also makes the unit gain frequency bandwidth change slightly when the load is varying, thus greatly improving the performance of transient response, Furthermore, on the basis of dynamic frequency compensation, an overcurrent protection circuit is designed.

文章针对LDO稳定性的问题，提出了一种内部动态频率补偿电路，使LDO线性稳压器的稳定性不受负载电容的等效串联电阻的影响，其单位增益带宽也不随负载电流变化而改变，大大提高了瞬态响应特性；采用Hynix 0.5μm CMOS工艺模型对电路进行仿真；此外，该电路在实现动态频率补偿的基础上又加入了系统的过流保护功能，当负载电流大于限制电流时，LDO不能正常工作；当负载电流小于限制电流时，又自动恢复到正常工作状态。

The ground side of the capacitor should be connected into the ground plane with minimal lead- or trace length.

最好从0.01mF最小电容值开始放置，并且靠近放置一个2.2mF的具有低等效串联电阻的电解电容器。

It is composed of six parts: PCI Bus interface module, signal generator, signal adjustor, gain and phase detector, A/D conversion module and control and data process module. The system can measure the gain and phase curves of the crystal with the frequency range from 1MHz to 150 MHz. Crystal parameters can also be calculated, such as resonant frequency, series resistance, shunt capacitance, motion capacitance, motion inductance and Q factor, etc.

该测试卡以 IEC 444 标准为测量原理，由 PCI 总线接口模块、信号发生器、信号调理模块、增益相位检测电路、A/D 转换模块等部分组成，能够有效测量 1MHz～150 MHz 频率范围的晶振的增益与相位特性、串并联谐振频率、等效电阻、动态电容、动态电感、品质因数和负载频率等主要电参数。

The high frequency models of resistors, inductors, capacitors and wires are built by experimental measurements.

采用实验的方法建立了电阻、电感、电容和导线的高频等效模型。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失