Current Amp
How can we say that the current flows through a Op-Amp when there is an virtual ground at the other terminal?
we genereally say that by using the virtual ground concept in op-amp that the voltage at the input terminal of the op-anp in zero. How can an op-amp use the given input to get the desired output???
Are you asking where the current that the output delivers comes from? from the power supplies, usually ±15 volts, which have a real ground connection.
There is a very low current into the inputs of an opamp. It’s very low, on the order of nAmps.
Perhaps you are asking how the output can provide a voltage if both inputs are at zero volts?
The inputs are not at zero volts, exactly. They are at the voltage required to make the output swing to whatever voltage it is at. Since the open loop gain is very high, say 100 thousand, that voltage is very low. If the output is at +5 volts, and the + input is at ground, then the – input is at -5/100000 or -50 microvolts.
Hope this clarifies things, I really don’t know exactly what you are asking. Contact me for more info if you need to.
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Fuzzface SHOOTOUT Dunlop era Dallas Arbiter vs current version Les Paul & Blues Jr amp
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# GE 9F62KED300 Current Limiting Fuse. Size DDDD. Type: EJO-1. 300 E Amps. $1,150.00 |
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Eaton Axcellis Beam Current AMP IV PCB, 5990-0097-0001 $499.00 |
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KINETIK® HC3800 3800 AMP 12V HIGH-CURRENT CAR AUDIO POWER CELL BATTERY KHC3800 $499.95 |
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208800D E-MON AC KILOWATTHOUR METER 800 AMP 115/208 4W 3 CURRENT SENSORS DEMAND $484.95 |
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GE 30 AMP 600 VOLT 3 POLE CURRENT LIMITING CIRCUIT BREAKER $350.00 |
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