LAB # $8$

OPERATIONAL AMPLIFIERS $-$ SUMMING AMPLIFIER

PARTS REQUIRED:

Signal Generator

Dual Power Supply $(+-15$ V$)$

Oscilloscope

Multimeter

Operational Amplifier $(741$C$)$

Resistors: $10k(3$ pcs$)$

Switches $(2$pcs$)$ SPST

Figure $8$

Calculations:

For the circuit shown in Figure $8,$ with switches $S_1$ and $S_2$ closed, calculate the voltage at the inverting input to the op$-$amp $($@ Pin $2).$ Also, calculate the voltage at the op$-$amp output $($@ Pin $6).$

With switch $S_1$ closed and $S_2$ open, repeat the calculations as in $(1)$ above.

With switch $S_1$ open and $S_2$ closed; repeat the calculations as in $(1)$ above.