Hello.
Please see the attached image first,
The image shows how to construct non-inverting negative feedback OP-AMP network with single supply voltage, which is preferred by me.
As my red note on the image tells, Single supply voltage operation can be compared to dual supply mode to understand operation.
Vcc/2 is virtual ground which is system ground when it is in dual supply mode. Similarly ground here is negative supply voltage in dual mode.
By comparing this circuit to dual mode which operation is well known, I got the following equation.
Vout = (1 + R2/R1)(Vin - Vcc/2) and this Vcc is referenced to Vcc/2, virtual ground of this circuit.
Thus desired output voltage with respect to system ground is Vout' = Vout + Vcc/2.
Could you please tell me my approach to understand single supply operation on OP-AMP is right?
And Can I change Vcc/2 to any value between Vcc and system ground, 0?
And in addition, I'm now trying to amplify 5V single square pulse of 10 us in pulse duration to double without seriously distorting signal to trigger some measurement instrument in my physic experiment. Is there other wave to achieve this more simply than using OP-AMP?
Please see the attached image first,
The image shows how to construct non-inverting negative feedback OP-AMP network with single supply voltage, which is preferred by me.
As my red note on the image tells, Single supply voltage operation can be compared to dual supply mode to understand operation.
Vcc/2 is virtual ground which is system ground when it is in dual supply mode. Similarly ground here is negative supply voltage in dual mode.
By comparing this circuit to dual mode which operation is well known, I got the following equation.
Vout = (1 + R2/R1)(Vin - Vcc/2) and this Vcc is referenced to Vcc/2, virtual ground of this circuit.
Thus desired output voltage with respect to system ground is Vout' = Vout + Vcc/2.
Could you please tell me my approach to understand single supply operation on OP-AMP is right?
And Can I change Vcc/2 to any value between Vcc and system ground, 0?
And in addition, I'm now trying to amplify 5V single square pulse of 10 us in pulse duration to double without seriously distorting signal to trigger some measurement instrument in my physic experiment. Is there other wave to achieve this more simply than using OP-AMP?
Attachments
-
138.5 KB Views: 30