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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)
【關(guān)注模擬】幾道模擬電路題目

(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
foxqiu
::
(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 

3樓: >>參與討論
foxqiu
;;
(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 

4樓: >>參與討論
foxqiu
;;

(7) What kind of theoretical operational AMPLIFIER CIRCUIT is shown below?

[A] Differentiator
[B]  Low-pass FILTER
[C]  Integrator
[D] Non-Inverting 

5樓: >>參與討論
foxqiu
;;

(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 

6樓: >>參與討論
foxqiu
關(guān)注模擬基礎(chǔ)知識,大家來練練。
 
7樓: >>參與討論
maychang
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

8樓: >>參與討論
iC921
相信他不會局限于此吧?
 
9樓: >>參與討論
drq1997
可惜我連這些都沒完全搞懂!
 
10樓: >>參與討論
sheepyang
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。

11樓: >>參與討論
王曉明
只能回答幾題,還請多多指教
 
12樓: >>參與討論
guorock
只曉得第一題的答案是D。
 
13樓: >>參與討論
※宇宙※
我做的答案
D、D、D、B、C、D、A、D、D、
有些是猜的。

參與討論
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