【正文】 （d） ，是否對(duì)集成運(yùn)放的共模抑制比要求較高，為什么？解： 因?yàn)榫泄材］斎胄盘?hào)，所以均要求用具有高共模抑制比的集成運(yùn)放。在什么頻率范圍時(shí)有反相放大功能。試求uo與ui的函數(shù)關(guān)系，并說(shuō)明該電路的功能。 由上式求得 上式反變換為 分析：該電路用同相輸入實(shí)現(xiàn)反相積分器功能，優(yōu)點(diǎn)是輸入電阻。，已知穩(wěn)壓管工作在穩(wěn)壓狀態(tài)，試求負(fù)載電阻中的電流。若R1為最小值，則為保證集成運(yùn)放工作在線性區(qū)， ＝20mV時(shí)集成運(yùn)放的輸出電壓應(yīng)為＋14V，寫成表達(dá)式為 故 R1min≈143Ω R2max＝RW－R1min≈（10－）kΩ≈ kΩ，并對(duì)運(yùn)放A2的作用和對(duì)電路中電阻值的限制作出分析。對(duì)元件值的限制：由表式可知，當(dāng)時(shí)。（a）設(shè)RRR5的節(jié)點(diǎn)為M，則 （b）先求解uO1，再求解uO。解： 。圖P625解：電路（a）實(shí)現(xiàn)求和、除法運(yùn)算，電路（b）實(shí)現(xiàn)一元三次方程。 （3）UO1（AV）和UO2（AV）為 UO1（AV）＝－UO2（AV）≈＝＝18V （4）uO not to have conquered, but to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wise answers。t get into a blind alley, don39。m afraid he turned to it as a joke to tell don39。 loss of sink, Eritrea pany. When you are in adversity, may wish to change a point of view to think everything over to the good Think, because good mentality decided the fate of the! 7, people are tired, rest。s mouth, because words will reduce its importance。am, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodness, helping others. Instead of accusing the society, as into one。t let everyone like you, so also do not want to do. Life is too short to go crazy to love to go to waste, to chase the dream to regret. 15, when temper, a blessing to go. A wounding elegant people, the key is to control their own emotions. With the mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two years of time to learn to speak, but to spend a few years time to shut up. That is a kind of ability, that is a kind of wisdom. 16, life is not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, there is only one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 toward the bottom of the sink. 17, in some way, do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you。t despair, the coast is still, if the fate of the withered petals of the beautiful, please do not sink, the spring is still, life will always be endless trouble, please don39。 choose a simple, is choose to be happy. The plex world like aSignificance of pride. Hope is the ornate palace, outside people admiring the magnificent, living in the deep knowledge of living it to pay the price. Simple world as a simple log cabin outside ridiculed shabby, the heart is willing to go live to know the joy. Suffering and joy is their own choice. 22, learn how to use a single powerful heart, let the past be the past, let the future e. Life is really the end of the end of an eagle is flying wings, life is constantly pursuit. Don39。 failing to do not frown, laugh it laugh. Results Don39。t really dare to adhere to the principle. No rade, constantly put on reworking an emergency meeting to Comrade Zhen to speak louder, management tube too strict. Remember in Dongguan Street, 400 meters long cement concrete surface layer, because of various reasons, the smoothness of the poor in the bottom cavity, covering film traces and car imprinting quality problems, * * * inquiries, immediately rushed to the scene to understand and verify the situation, the convening of the management office, the construction units, supervision units, construction units, construction units construction time is tight, the economic loss and other reasons to intercede ******** unmoved. He said, now a popular word, to the discipline and rules quite in front, there are no rules Radius, you construction team not accordance with the technical specifications, quality problems, it must be to carry out rectification. Engineering quality responsibility be weightier than Mount Tai, if we manage to this matterPavement quality quantity are placed the matter, we this time to learn two regulations have what use? Still what is the Communist Party? Finally, in his insisted, the road after rework, to solve these problems. In the construction of the new rades and the project all the colleagues efforts, after four months of fighting, the project the main project was finally pleted and passed inspection. Thousands of miles of ice, thousands of miles Piao, this is a splendid and romantic scene. But snow for the highway, it is a disaster, a serious threat to the traffic safety. This year, a month, a century of cold wave swept from North to south, and the snow blowing to Guangdong, but also to bear the blow To * * * * the highway. In January on the evening of 23, Lianping county city temperatures dropped to minus 2 degrees, a wide range of sudden rain sleet, before and after the provincial S341 line in Jiulianshan Mountain tunnel sections of the road appeared in the snow, lead to the passing vehicles skid, traffic is blocked. In the face of the sudden natural disasters, city and county highway department immediately launched the emergency plan for disaster prevention. As the front line of the main force, Lianping Highway Bureau of all Party members and cadres to remember the Party member responsibility, braving the biting cold wind, the first time rushed to the scene, on the icy pavement of salt disposal. Because the temperature is too low, just melt water immediately freezes, addition to the ice work to increase the difficulty. To ensure In addition to the re organization of the depths of the traffic safety, road people braved the icy put reflective cones and warning signs, endure cold at minus 2,3 of Jiulianshan patrols until one in the morning. Just before dawn, Lianping Highway Bureau personnel on the icy road salt ice melting processing until ten o39。 total score of 90 94 for excellent, 8 million yuan reward。s Political Consultative Conference tube member responsibilities. Acco