EE_10_F07_Lecture 9

EE_10_F07_Lecture 9 - UCLA ELECTRICAL ENGINEERING...

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UCLA E LECTRICAL E NGINEERING D EPARTMENT : EE 10: C IRCUIT A NALYSIS 1 L ECTURE 10 L ECTURE 9 LECTURE NOTES: NOV 7, 2005 OUTLINE REVIEW . ....................................................................................................................................... 2 OPERATIONAL AMPLIFIER IMPORTANT DEFINITIONS . ............................................. 3 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING METHODS. .................................................................................................................................... 4 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING PROCEDURE FOR NON-IDEAL OPERATIONAL AMPLIFIER CIRCUITS . .................. 5 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING PROCEDURE FOR NON-IDEAL OPERATIONAL AMPLIFIER CIRCUITS: REVIEW.6 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING PROCEDURE FOR IDEAL OPERATIONAL AMPLIFIER CIRCUITS. ............................. 9 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING PROCEDURE FOR IDEAL OPERATIONAL AMPLIFIER CIRCUITS. ........................... 10 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING PROCEDURE FOR IDEAL OPERATIONAL AMPLIFIER CIRCUITS: REVIEW. ........ 11 OPERATIONAL AMPLIFIER CIRCUIT PSPICE SIMULATION PROBLEM SOLVING METHODS. .................................................................................................................................. 12 OPERATIONAL VOLTAGE ADDER. .................................................................................... 16 INTRODUCING VOLTAGE SUPPLY SATURATION LIMITS FOR THE OPERATIONAL VOLTAGE ADDER. .................................................................................... 17 PSPICE IDEAL OPERATIONAL AMPLIFIER. .................................................................... 20 VOLTAGE SUPPLY SATURATION LIMITS FOR THE OPERATIONAL VOLTAGE ADDER: PROBLEM 5.10 PSPICE SIMULATION. ............................................................... 22 1
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UCLA E LECTRICAL E NGINEERING D EPARTMENT : EE 10: C IRCUIT A NALYSIS 1 L ECTURE 10 REVIEW 1. Introduction to Operational Amplifiers Application: Magnetic Storage Disk Drive Read Channel 2. Operational Amplifier Characteristics 3. Negative Feedback Principles 4. Ideal Operational Amplifier Circuits 5. Non-Ideal Operational Amplifier Circuits 2
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UCLA E LECTRICAL E NGINEERING D EPARTMENT : EE 10: C IRCUIT A NALYSIS 1 L ECTURE 10 OPERATIONAL AMPLIFIER IMPORTANT DEFINITIONS + - - + R O A V ( v + - v - ) v + v - v O R i Figure 1. Operational Amplifier Equivalent Circuit Before proceeding further, we must list key definitions for the Operational Amplifier: Non-Ideal Operational Amplifier 1. A V : Open Loop Gain Value is Finite 2. R i : Open Loop Input Resistance Value is Finite 3. R O : Open Loop Output Resistance Value is Finite Ideal Operational Amplifier 1. A V : Open Loop Gain Value is Infinite 2. R i : Open Loop Input Resistance Value is Infinite 3. R O : Open Loop Output Resistance Value is Zero These quantities are termed Open Loop values since they will prevail in the case where the Operational Amplifier were to operate without negative feedback. In the event that negative feedback is properly included, the system values of gain and input and output resistance may be very different. 3
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UCLA E LECTRICAL E NGINEERING D EPARTMENT : EE 10: C IRCUIT A NALYSIS 1 L ECTURE 10 OPERATIONAL AMPLIFIER CIRCUIT ANALYTICAL PROBLEM SOLVING METHODS There are two fundamental classes of problems that we will encounter in solving operational amplifier circuit problems. The first class concerns the case where we assume Ideal Operational Amplifier behavior The second class concerns the case where we assume Non-Ideal Operational Amplifier behavior In both cases, with some care, we will be able to easily use our straightforward node- voltage approaches to solve our problem.
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EE_10_F07_Lecture 9 - UCLA ELECTRICAL ENGINEERING...

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