Certainly...but you have to use an output coupling capacitor, at the very least. You will also have to forward bias your non-inverting input....a simple voltage splitter does the trick here.
It has the advantage of using a light bulb to serve as an AGC. HP used a design very similar to this to produce one of their first major pieces of test equipment. It produces a very pure sine wave.
Can the schematic of op amp 741 model be used to design a +Vcc/Gnd op amp.
I tried using it, But the circuit always saturates to the Vcc voltage. The biasing in the circuit, does not come to Vcc/2 (rather I am not able to do it, I started my work by "designing" a single supply op amp).
Any suggetions.
I did go through the materials from TI. But somehow was not convinced.
Regards
Schematic please? There are ways to use a single supply voltage, but a 741 needs a lot more voltage than most. When you look at the spec sheet they neglect to specify a minimum voltage. I suspect without knowing (because you didn't specify) that you are starving the op amp for power. Figure 12VDC as an absolute minimum, more is better.
A LM324 is speced for down to 3VDC, as are many newer op amps.
I am actually "designing", rather simulating it on Cadence.
The flow is like this,
R2 = R3 = 3600 Q3 area = 3
R1 = 2.5k voltage at the output = -3.24v
R13 = 28k voltage at he base of Q1,Q7 = -1.25V
R8 = 25 cap = 30pF
R17 = 50
R81 = 200
I request you to tell me the mistakes done in this design under these categories:
1. Blunders
2. never do it
3. silly
4. "foolish"
In this particular design, I have observed that Q3 saturates and pulls the output to +4.668v when Q30 is changed to "pnp" from "npn"
The model files used are from the foundry kit.
My doubts:
Does this need a start up circuit?
Does it need a completely different biasing technique , if I were to implement a similar design for +Vcc(+5v)/Gnd supply ?
Target :
Design an op amp for +5V/ Gnd , Avol = 80dB, BW = 1Mhz.