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electronics_kumar
Joined: 29 Nov 2004
Posts: 664
Helped: 26
Location: Tamilnadu
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 13 Mar 2006 13:10 improve slew rate 741a |
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| is there any possibility of improving Slew rate of a op-amp IC 741
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vsgiri
Joined: 24 Feb 2006
Posts: 94
Helped: 10
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13 Mar 2006 13:50 IMPROVING SLEW RATE |
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Hi electronics_kumar!
There are only two ways of improving the slew rate in an opamp.
One is to increase the bias current and the other is to reduce the compensating capacitance.
We certainly cannot alter the bias currents. And since 741 is internally compensated, you are pretty much stuck with whatever it gives!
Giri
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beckchm
Joined: 13 Nov 2005
Posts: 210
Helped: 3
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12 Apr 2006 16:42 Re: IMPROVING SLEW RATE |
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| the device is already made so it can not be changed
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BeeBop
Joined: 19 Feb 2006
Posts: 161
Helped: 15
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13 Apr 2006 1:28 Re: IMPROVING SLEW RATE |
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Hi Kumar,
Why don't you try a more recent op amp. Most of them have the same pin out, so they will just plug into your circuit. TLC081, OP07, I think, both have the same pinout, and better slew rate, if I'm not mistaken. (You should check the data sheets.)
Regards,
Robert
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jiveshgovil
Joined: 31 Mar 2006
Posts: 134
Helped: 16
Location: New Delhi
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13 Apr 2006 3:15 Re: IMPROVING SLEW RATE |
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| electronics_kumar wrote: |
| is there any possibility of improving Slew rate of a op-amp IC 741 |
By Using operational mirror amplifier, thhe slew rate is almost null. You can ask your analog teacher for this. It is not taught commonly but is very esay to implement.
Operational Mirror amplifier is technique so you can use the same IC 741.
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13 Apr 2006 3:15 Ads |
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vishwa
Joined: 11 Aug 2005
Posts: 156
Helped: 12
Location: India
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13 Apr 2006 7:19 Re: IMPROVING SLEW RATE |
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| I think it is not possible to change the slewrate of an op-amp after fabricated.
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raybo
Joined: 05 Apr 2006
Posts: 33
Helped: 2
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15 Apr 2006 12:40 Re: IMPROVING SLEW RATE |
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| slew rate comes with the amp there is practically nothing to inprove on it a 741 if you try to slew faster then you will have the side effect of delay. you want improve it buy a dif amp some are totaly pin for pin compatable. to tell you the truth this guy is very slow to begin with.
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