An operational-amplifier circuit is shown in the figure.

The output of the circuit for a given input $${V_i}$$ is

In the circuit shown below what is the output voltage $$\left( {{V_{out}}} \right)$$ in Volts If a silicon transfer $$Q$$ and an ideal op-amp are used?

A low pass filter with a cut-off frequency of $$30Hz$$ is cascaded with a high pass filter with a cut off frequency of 20Hz. The resultant system of filters coil function as

For the circuit shown below, the correct transfer characteristics is