Q.21 in the operational amplifier circuit shown below, input voltages v, =v and v, =v 2 2 are applied. what isv r 100 k w 5v r-50 k2 wm o- - r-50 k2 15v sr= 50

Q.21 In the operational amplifier circuit shown below, input voltages V, =V and V, =v 2 2 are applied. what isV R 100 k W 5V R-50 k2 WM O- - R-50 k2 15v SR= 50 k2 20/36 (a) Determine the current flowing through resistance Ra and the output voltage Vo. (12) (b) In the above circuit, if Vi is grounded and square pulses of peak voltage IV and frequency 100 Hz are applied at Va, determine the voltage and phase change of the output pulses. (9)