To reduce power dissipation of the amplifier , a kind of on / off technology is used in the circuit . with a little bias current circuit to control the main bipolar transistor operation , the transistor will be in a state of on / off 采用器件旁路小电流工作电路,实现对低噪声放大器主要工作晶体管的控制,使该晶体管按需要分别处于工作或关断状态,保证了放大器的极低功耗。
One ： l should not be frequently shut off ; controlled the lamps and lanterns to kill bright by k while supplying power normal . can ' t adopt and cut off battle line . line zero power , while presenting the accident , the emergent lamps and lanterns can ' t work normally 一： l不宜频繁关断；正常供电时由k控制灯具亮灭，不得采取切断火线、零线电源，否则出现事故时，应急灯具不能正常工作。
The gascat gips / gdps series of automatic shutoff valves are used as the main safety device for transmission , distribution and measurement of natural gas or lpg gas system protection , and for non - corrosive gas systems in general 升压感应关断型?与gdps ?降压感应关断型?系列自动关断阀适用于天然气或液化石油气之输送、配气与计量系统，还有一般无腐蚀瓦斯气体系统保护的主要安全设施。
To make sure the safety of the equipment that would be tested and the staff of testing , the protest circuit will reach more demanding . this paper make more use of the fast - cahinet ' s fast closing character in this kind of variable frequency source 为了保证被试品和人身安全，对于保护回路提出更高的要求，文中针对该变频电源的特点，利用快速可控硅的快速关断特性实现保护过程。
The second , the realization of the zvs has no concerned with the attribute of load . with the load of light or full , even the resistance or inductor load , the chopper can ensure that the main - switches will realize the zvs switching 其次,实现零电压软开关的条件与负载的性质和程度没有关系,无论是电阻性负载还是大电感负载,无论是轻载还是满载,都可以实现功率器件的零电压开通和关断。
