Design a rectifier circuit using op-amp(s) and required components such that it allows the negative part and inverses the positive part (output voltage peak values should exactly be equal to the input peak amplitudes with absolute values). a) Draw the circuit and explain how it works. b) Sketch the input and output voltages when input is 1.sinwt (V). c) Draw the transfer characteristic Vo-Vi. d) What is the special name of this circuit and why is it important?