Consider the readout circuit of a piezoelectric sensor shown in the figure.
When the piezoelectric sensor generates a charge $q_{p}$, the resulting change in voltage $\mathrm{V}_{\mathrm{X}}$ is $-2 \mathrm{~V}$. Then the corresponding change in the voltage $\mathrm{V}_{\text {out }}$ is V (rounded off to nearest integer).
Note: Assume all components are ideal.