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【關(guān)注模擬】幾道模擬電路題目 |
| 作者:foxqiu 欄目:模擬技術(shù) |
(1)What characteristic(s) would be optimal for an ideal op-amp? [A] Infinite input impedance [B] Zero OUTPUT impedance [C] Infinite gain [D] All of the above (2)What is the best way to solve on op-amp oscillation problem? [A]Try fixing any one of these, and if that doesn't help, leave that fix on, and try another [B]Add a variable series-R-C damper from ground, to the OUTPUT or input. Adjust the R and C values [C]Note the frequency of oscillation. [D]All of the above (3)What is the likely cause of oscillation in op-amp circuits? [A] Too much or too/little feedback capacitance [B] Excessive capacitive load on the OUTPUT [C] Oscillation of the POWER supply [D] All of the above (4)Which Operational AMPLIFIER CIRCUIT has the highest impedance? [A]Summing Amp [B]PRECISION Current Source [C]Unity-Gain Buffer [D]Photodiode AMPLIFIER |
| 2樓: | >>參與討論 |
| 作者: foxqiu 于 2006/1/26 16:22:00 發(fā)布:
:: (5)How do you get R1/R2 = R3/R4? ![]() [A] Buy expensive resistors at 0.001% [B] Buy expensive matched resistors at 0.001% [C] Trim with POT [D] Place a CAPACITOR between R3 and R4 |
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| 3樓: | >>參與討論 |
| 作者: foxqiu 于 2006/1/26 16:24:00 發(fā)布:
;; (6) How can you improve the noise and stability of this CIRCUIT? [A] Add a small amount of Cf in parallel with R1, Cf = 1/50 x C1 [B] Add a large amount of Cf in parallel wth R1 [C] Add a small amount of Rin in series with C1, about 1/20 x Rf [D] Both A and C |
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| 4樓: | >>參與討論 |
| 作者: foxqiu 于 2006/1/26 16:25:00 發(fā)布:
;; (7) What kind of theoretical operational AMPLIFIER CIRCUIT is shown below? ![]() [A] Differentiator [B] Low-pass FILTER [C] Integrator [D] Non-Inverting |
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| 5樓: | >>參與討論 |
| 作者: foxqiu 于 2006/1/26 16:27:00 發(fā)布:
;; (8) In the CIRCUIT below, when is it important to make R5=R1||R2||R3||R4? ![]() [A]When R5 is very large When Ib is large [C] When R5 x Ib is large [D] When VS is large [b](9) What are the reason(s) why the CIRCUIT below is ONLY a theoretical CIRCUIT? ![]() [A] Stability Problems [B] Noise Problems [C] THERMAL shut down [D] A and B |
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| 6樓: | >>參與討論 |
| 作者: foxqiu 于 2006/1/26 16:37:00 發(fā)布:
關(guān)注模擬基礎(chǔ)知識,大家來練練。 |
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| 7樓: | >>參與討論 |
| 作者: maychang 于 2006/1/26 17:29:00 發(fā)布:
樓主要是以為這些就是“模擬基礎(chǔ)知識” 那就錯了。 這些僅是模擬電路知識的很小一部分。 * - 本貼最后修改時間:2006-1-26 17:30:08 修改者:maychang |
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| 8樓: | >>參與討論 |
| 作者: iC921 于 2006/1/29 17:17:00 發(fā)布:
相信他不會局限于此吧? |
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| 9樓: | >>參與討論 |
| 作者: drq1997 于 2006/1/30 18:03:00 發(fā)布:
可惜我連這些都沒完全搞懂! |
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| 10樓: | >>參與討論 |
| 作者: sheepyang 于 2006/1/31 10:32:00 發(fā)布:
應(yīng)該算是基礎(chǔ)了 只要運放掌握好,模擬就不怕了。 可惜我還是不了解運放。 |
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| 11樓: | >>參與討論 |
| 作者: 王曉明 于 2006/2/7 19:53:00 發(fā)布:
只能回答幾題,還請多多指教 |
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| 12樓: | >>參與討論 |
| 作者: guorock 于 2006/2/8 8:35:00 發(fā)布:
只曉得第一題的答案是D。 |
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| 13樓: | >>參與討論 |
| 作者: ※宇宙※ 于 2006/2/8 11:36:00 發(fā)布:
我做的答案 D、D、D、B、C、D、A、D、D、 有些是猜的。 |
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