(Solved): A4. a) Name the types of Operational amplfiers (OPAMPs) in below circuit diagrams of Figures A4.1 a ...

A4. a) Name the types of Operational amplfiers (OPAMPs) in below circuit diagrams of Figures A4.1 and A4.2, respectively. [2 marks] b) For same Figures A4.1 and A4.2, compute the OPAMP gain, and then output voltage \( v_{0} \) in terms of input \( v_{i} \), respectively. (Hint: Consider linear region \& ideal OpAmp rules for both the circuits). For both the circuits, \( R_{i}=10 \Omega, R_{s}=5 \Omega \) [7 marks] c) Name the amplifier provided in Figure A4.3 below. For inputs \( v_{a}(t), v_{b}(t) \) and \( v_{c}(t) \) we obtain the output voltage \( v_{e}(t) \) which is given as \( v_{0}(t)=-3 v_{a}(t)-4 v_{b}(t)-8 v_{c}(t) \) Compute values of \( R_{1}, R_{b} \) and \( R_{c} \) (for \( R_{c}=100 \) ). [4 marks]