drain vt. 1.排去(水等液体),排泄,放干 (away; off)。 2.喝干,倒空。 3.用完,花光。 4.使…某物枯竭;使…耗尽某物 (of)。 drain off the rain 排掉雨水。 drain the flooded mine 排干矿上的积水。 drain a glass of beer 喝干一杯啤酒。 drain the cup of sorrow [pleasure] to the bottom 备尝艰苦[享尽快乐]。 He drained the last of the whiskey into our glasses. 他把最后一点威士忌酒都倒进我们的杯子里。 be drained of all strength 筋疲力竭。 drain a country of its resources 使国家资源枯竭。 vi. 1.(水等液体)流掉,渐渐淌完 (away; off)。 2.(土地)排水;(衣服、碗碟等)滴干。 3.(资源等)逐渐枯竭。 The water will soon drain away. 水很快就会流掉。 His anger drained from him. 他的怒气逐渐消失。 This land won't drain. 这块田排不出水去。 This land drains into the river. 这块地的水排到河里。 Put the dishes on the board to drain. 把碗碟放到板上滴掉水。 Hope and energy drain away over the years. 岁月逐渐使精力和希望枯竭了。 n. 1.排水渠;下水道,阴沟;〔pl.〕 (建筑物的)排水系统。 2.【医学】引流,导液(管),排脓管。 3.排水,放干;(财富等的)外流,枯竭;耗费,负担。 4.〔口语〕(酒的)一杯,一口。 the economic drain of war 战争的经济耗费。 Working too hard is a drain on his strength. 过分辛劳使他精力衰竭。 go down the drain 〔俚语〕 1. (情况)愈来愈坏,(人)每况愈下。 2. (资金等)被浪费;(计划等)失败,破产。 laugh like a drain 〔口语〕狂笑。 adj. -less 〔书面语〕取之不竭的。
It is shown that neglecting the gate - drain capacitance of the mosfet would lead to an overestimation of the optimum device width in the cmos source degenerated lna 本文证明了在cmos源端degeneration结构的低噪声放大器中,忽略场效应管的栅漏电容将造成对放大管的最优栅宽估计过大。
The lna with source inductor degeneration is analyzed in detail , which is used most widely in current . base on the analysis , a cascode structure is presented to minimize the effect of gate - drain capacitance cgd 针对目前lna中应用最广泛的源极电感负反馈结构,进行了详细分析,在此基础上对该结构做出了优化,采用共源共栅级联结构,减小了栅漏电容cgd的影响。