输出管

In such circuits control of the output current is required and this is sometimes achieved by replacing some of the diodes in bridge rectifier with thyristor s, whose voltage output can be regulated by means of phase fired controllers .

在这种电路的输出电流控制是需要和这有时通过一些在桥式整流二极管的替换的晶闸管，可以触发相位控制器的方式规管其电压输出。

In the power supply circuit, series power supply and the adjustment of the series load, the load current flows through all of the adjustments, and transistors Guozainaili worse, once output overload or short circuit, the input voltage increases in the full set of adjustment an emitter, the current surge to adjust the fierce heat, if not over-current protection measures at this time, the adjustment will be burned, power Zhengliuguan also will be greatly threatened or damaged.

中文摘要：在稳压电源电路中，串联型稳压电源的调整管与负载串联，负载电流全部流经调整管，而晶体管的过载能力较差，一旦输出端过载或短路，输入电压全部加在调整管集---射极间，其电流剧增，使调整管猛烈发热，如果此时没有过流保护措施，调整管就要被烧坏，电源整流管也将受到巨大威胁或损坏。

In the design of the power supply, the main circuit topology frame uses full-bridge series resonant switching and parallel load connection, in which, four MOSFETs are adopted as the power switches, and by four pulses which UC3879 produces, high frequency operation and fast response are realized. In addition, the MOSFET in the switching power supply has no hard turn-on or turn-off situation in transition, thus the disturbance to the power system is avoided. Especially,by the use of high frequency transformer, PQ50/50, the switching power system can provide the steady discharge current without any amperite.

此开关电源采用全桥软开关技术、串联谐振并联输出，四个MOSFET管为主控制开关元件，通过脉冲产生电路UC3879产生的四路相关脉冲实现了高频交替开关，同时能快速响应输出的各种变化；避免了开关管的硬开关，提高了转换效率，另外通过采用高频变压器PQ50/50隔离了原副边，减小了高次谐波对电网干扰；无需镇流电阻也可实现气体稳定放电。

Accurate analog power is to provide power, digital chip, amplifiers, microcontroller is the voltage required by A/D sampling data output voltage, and comparison, if there is A deviation is the limit, adjust output signal output and closure, alarm, The working process of the working status, manostat by SCM outputs drive LED display, Display circuit used to display the size of the output voltage of power.

准确说就是模拟电源提供各个芯片电源、数码管、放大器所需电压，单片机则通过A/D采样输出电压，与设定值进行比较，若有偏差则调整输出，越限则输出报警信号并截流；工作过程中，稳压电源的工作状态均由单片机输出驱动LED显示；显示电路用于显示电源输出电压的大小。

Gate wheel rotation, the gate blocking the cyclical round of gear issued by the infrared LED infrared radiation to the receiving component of a pipe and tube B, thus A and B outputs electrical pulses to control the mouse chip.

栅轮转动时，栅轮的轮齿周期性遮挡红外发光管发出的红外线照射到接收组件中的甲管和乙管，从而甲和乙输出端输出电脉冲至鼠标内控制芯片。

In order to accurately identify the sites of action of oestrogens and androgens, we have proceeded to the immunohistochemistry localization of the oestrogen receptors and the androgen receptor in the reproductive system and adrenal of sheep through gestation to adult.

本研究的包括下列四方面主要研究内容和研究结果：一、首次发现70d、90d、120d的小尾寒羊胎儿和新生羔睾丸、附睾和输出小管中没有ERβ表达，在输出小管上皮细胞中有大量的ERα，睾丸和附睾中没有ERα。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage value s.

摘 要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

Abstract摘要:This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要摘要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。