10/18/09

PSpice / GNUCAP :: Op.Amp Voltage Follower

spice Op.Amp Voltage Follower

Op Amp Voltage Follower

Op Amp Non-Inverting Amplifier

*OPAMP Voltage Follower
V1 4 0 0        sin( 0 1.2 500 )
R1 4 3  1
R2 1 2  1
R3 2 0  1MEG
X1 3 2 1        OPAMP
.SUBCKT OPAMP 1 2 6
R_in    1 2     10MEG
E_gain  3 0 1 2 100k
R_p1    3 4     1k
C_p1    4 0     1.59p
E_buffer        5 0 4 0 1
R_out   5 6     10
.ENDS
.TRAN .1m 5m 0
.PLOT TRAN v(3) v(1)
.END
.

Op Amp Voltage Follower

  • The voltage gain is set by the ratio of the feedback resistors R2 and R3.
  •  Vo/Vi=1+R2/R3
      

SIMULATION

  • Plot the input V(4) and output V(1) of the Transient Analysis.
  • The innards of the opamp device is defined by a subcircuit.

SEE ALSO

spice OpAmp-VoltageFollower ( TXT )

spice OpAmp-VoltageFollower ( Online )