how is this circuit about?help me analysis it.

[rockyou]

hi guy,mind to know how does the R8 and R7 influence the overall circuit?
is the op-amp act as amplifier in this case?if it does,how come the input no have resistance?

should like this.

 

[KMoffett]

https://en.wikipedia.org/wiki/Operational_amplifier_applications

ken

 

[rockyou]

do u mean tat op amp act as exponential output??

 

[karesz]

This means only that your circuit has a "potential function" or nonlinear, as reason for application as triangular to sinus shaper...
You will find it in practically all "funtion generators" too.
K.

 

[FvM]

do u mean tat op amp act as exponential output??

Obviously, ken was refering to "2.2 Inverting amplifier".