Give example of circuit under combinational circuit

Design an op-amp circuit that meets the following specifications. Your design can be done with one or two op-amps. Your instructor may give you a different design. Note: Show all work. Draw a schematic of your design and label component values and op-amp pin numbers. a. The op-amp circuit must have a non-inverting overall voltage gain that is adjustable from +3 to +12. The circuit has a 47 k load resistor connected from the last op-amp's output terminal to ground. b. c. The circuit input resistance must be ≥ 50 kn. Your design is limited to a maximum of two op-amps and seven resistors, one of which is a variable 100 k resistor (potentiometer). The potentiometer resistance is 0 22 when adjusted to one extreme of its range and 100 k at the other extreme. d. When the potentiometer is adjusted to one extreme position the overall circuit voltage gain should be +3. When the variable resistor is adjusted to its other extreme position the overall circuit voltage gain should be +12.

Problem 2-Design an OpAmp circuit that can perform the following operation v = (3v1 +5v2). Include the circuit and block diagram.

9. When using superposition, what is the ideal internal resistance of a voltage source? The Thevenin equivalent resistance An open circuit O A short circuit The equivalent resistance of the reduced combination circuit.