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EE40 Lecture 24 Venkat Anantharam 3 31 08 Reading Chap 14 Operational Amplifiers EE40 Spring 2008 Slide 1 Venkat Anantharam Ideal Op Amp Analysis Inverting Amplifier Yes Negative Feedback is present in circuit R2 R1 I2 VIN VR Voltage is VR Only two currents for KCL RL V OUT VR VIN VR VOUT 0 R1 R2 VOUT R2 Vin VR VR R1 Inverting Amplifier with reference voltage EE40 Spring 2008 Slide 2 Venkat Anantharam Inverting Amplifier Negative feedback checked Use summing point constraint R2 2 R1 v i 2 v0 vin v1 vo Closed loop gain Av vin v1 v2 0 i1 i2 0 Use KCL At Node 2 vin v2 vout v2 i R1 R2 vo R2 vo R1 vin Input impedance R1 i RL Ideal voltage source independent of load resistor EE40 Spring 2008 Slide 3 Venkat Anantharam
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