# Why this operational amplifier is saturated?

my problem is that in this circuit: Where $\pm V_{cc} =\pm 15V, R1=1k\Omega, R2= 10k\Omega$, if I introduce a signal like: $v_i(t) = 2 \cos{(2\pi 1000 t)}$, the output voltaje is this: Where the green line is the input and the red one the output. The problem is that although the O.A. is working between $\pm 15V$, the output signal is saturated at 4V approximately and I don't know why that happens.

The netlist of Pspice is this: Moreover, I went to the laboratory and the O.A. ua741 was also saturated with that input signal.

Thank you so much for your help.

• If that's a simulation then the 10kO (ten-k-oh rather than ten-k-zero) might be a problem. Try removing the 'O'. If it is a simulation then your question should make it clear and state the software being used. Welcome to EE.SE. – Transistor May 16 '18 at 16:08
• @Transistor good catch, that could be the issue. Looks like PSPICE to me from the output graph. – John D May 16 '18 at 16:11
• post your spice netlist – Voltage Spike May 16 '18 at 16:49
• I count 4 opamps in the netlist. Is it possible for you to create a separate netlist that actually reflects your lab arrangement so that we don't have to guess? – jonk May 16 '18 at 17:15
• My PSpice 9.1 netlist look like this R_R1 0 $N_0001 1k R_R2$N_0001 vo 10k V_V3 vi 0 DC 0 AC 0 +SIN 0 2 1k 0 0 0 V_V1 Vcc 0 DC 15 X_U1 vi \$N_0001 Vcc -Vcc vo uA741 V_V2 0 -Vcc DC 15 R_RL vo 0 10k – G36 May 16 '18 at 17:18