Op Amp Applications 1EEE 3308 Analyses for A ∞ and loop gain are separate. Design breaks down into two parts: - Arranging A ∞ to do the job - Ensuring.

Slides:

Advertisements

Similar presentations

Chapter 3 Feedback Amplifiers

Advertisements

Introduction Goal: Understand the design of op-amp based ICs (comparators, oscillators, integrators, differentiators, instrumentation amplifiers) for applications.

Operational Amplifier

Summing Amplifier -+-+ RFRF R4R4 + IFIF I4I4 VoVo R3R3 + I3I3 V3V3 V4V4 R2R2 + I2I2 V2V2 R1R1 + I1I1 V1V1 RLRL V id.

ECE201 Lect-161 Operational Amplifiers ( ) Dr. Holbert April 3, 2006.

ANALOG ELECTRONIC CIRCUITS 1 EKT 204 Frequency Response of BJT Amplifiers (Part 2) 1.

ECEN 301Discussion #18 – Operational Amplifiers1 Give to Receive Alma 34:28 28 And now behold, my beloved brethren, I say unto you, do not suppose that.

Operational Amplifiers

EECS 40 Spring 2003 Lecture 9S. Ross and W. G. OldhamCopyright Regents of the University of California DIFFERENTIAL AMPLIFIER +  A V+V+ VV V0V0 Differential.

ECEN 301Discussion #17 – Operational Amplifiers1 DateDayClass No. TitleChaptersHW Due date Lab Due date Exam 29 OctWed17Operational Amplifiers8.1 – 8.2.

EMT 212 ANALOG ELECTRONICS Professor Robert T Kennedy.

Introduction to the OP AMP

ECE 201 Circuit Theory I1 Introduction to the Operational Amplifier μA 741 OP AMP.

Operational Amplifiers (Op Amps) Discussion D3.1.

8C Inleiding Meten en Modellen – 8C120 Prof.dr.ir. Bart ter Haar Romeny Dr. Andrea Fuster Faculteit Biomedische Technologie Biomedische Beeld.

Lecture 91 Loop Analysis (3.2) Circuits with Op-Amps (3.3) Prof. Phillips February 19, 2003.

Week 6aEECS40, Spring 2005 Week 6a OUTLINE Op-Amp circuits continued: examples Inverting amplifier circuit Summing amplifier circuit Non-inverting amplifier.

Op Amps Lecture 30.

1 More on Op Amps Discussion D Ideal Op Amp 1) The open-loop gain, A v, is infinite. 2) The current into the inputs are zero.

Lecture 251 More On Op Amps. Lecture 252 Review The ideal op amp model leads to the following conditions: i + = i - = 0 v + = v - The op amp will set.

Lectures Week 8 The operational amplifier (“op amp”) Feedback

Lecture 12, Slide 1EECS40, Fall 2004Prof. White Midterm 1 – Tuesday Oct. 12, 2004, 12:40-2:00. Last names beginning with A-L in F295 Haas; M-Z in Sibley.

Lecture 9: Operational Amplifiers

1 ECE 3336 Introduction to Circuits & Electronics MORE on Operational Amplifiers Spring 2015, TUE&TH 5:30-7:00 pm Dr. Wanda Wosik Set #14.

Department of Information Engineering357 Feedback Op amp golden rules Approximations: 1.Voltage difference between the two inputs is zero 2.Input draws.

Operational Amplifiers

Ch7 Operational Amplifiers and Op Amp Circuits

Announcements Assignment 3 due now, or by tomorrow 5pm in my mailbox Assignment 4 posted, due next week –Thursday in class, or Friday 5pm in my mailbox.

Electronic Circuits Laboratory EE462G Lab #8 BJT Common Emitter Amplifier.

IDEAL OPERATIONAL AMPLIFIER AND OP-AMP CIRCUITS

“Op-Amp” Operational Amplifier Non Inverting Amplifier Inverting Amplifier Adder –(and Subtractor using an Inverter) Differential Amplifier Integrator.

ECE 340 ELECTRONICS I OPERATIONAL AMPLIFIERS. OPERATIONAL AMPLIFIER THEORY OF OPERATION CHARACTERISTICS CONFIGURATIONS.

Inverting Amplifier Under stable linear operation – A OL = ∞, R in = ∞ – V o = A OL (V in(+) – V in(-) ) – V id = (V in(+) – V in(-) ) = V o /A OL = 0.

Objective of Lecture Apply the ‘almost ideal’ op amp model in the following circuits: Inverting Amplifier Noninverting Amplifier Voltage Follower Summing.

Ideal Op-Amp Input impedance of op-amp is ∞ – No current flow in or out of input terminals Output impedance of op-amp (with respect to ground) is ‘0’ –

ECES 352 Winter 2007Ch 13 Oscillators1 Oscillators *Feedback amplifier but frequency dependent feedback *Positive feedback, i.e. β f (  ) A (  ) < 0.

ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Fourth Edition, by Allan R. Hambley, ©2008 Pearson Education, Inc. Lecture 9 Op-Amp Circuits.

Comparing two ways to find loop gain in feedback circuits Rob Fox University of Florida.

ECE 3710 E: Circuits and Electronics Jeff Dugger Lecture 4: 08/31/00.

EE 1270 Introduction to Electric Circuits Suketu Naik 0 EE 1270: Introduction to Electric Circuits Lecture 13: Operational Amplifiers Part 2 Chapter 5.

Electronics - Revision 2. In electronics, it is the voltage that is important. Draw voltage time graphs for analogue and digital systems. 3. Draw a block.

Operational Amplifiers Instructor: Chia-Ming Tsai Electronics Engineering National Chiao Tung University Hsinchu, Taiwan, R.O.C.

What is an Op Amp? Ideal Op Amps Applications Examples Lecture 9. Op Amps I 1.

1 ANALOG ELECTRONICS II Frequency Compensation  the technique of modifying open-loop gain  the purpose is to ensure that op-amp circuits will be stable.

TECHNIQUES OF DC CIRCUIT ANALYSIS: SKEE 1023

EE 1270 Introduction to Electric Circuits Suketu Naik 0 EE 1270: Introduction to Electric Circuits Lecture 13: Operational Amplifiers Part 1 Chapter 5.

Mixed Signal Chip Design Lab Operational Amplifier Configurations Jaehyun Lim, Kyusun Choi Department of Computer Science and Engineering The Pennsylvania.

CHAPTERS 5 & 6 CHAPTERS 5 & 6 NETWORKS 1: NETWORKS 1: October 2002 – Lecture 5b ROWAN UNIVERSITY College of Engineering Professor.

CHAPTERS 6 & 7 CHAPTERS 6 & 7 NETWORKS 1: NETWORKS 1: October 2002 – Lecture 6b ROWAN UNIVERSITY College of Engineering Professor.

Designing for Predictable Amplifier Gain Gain is hard to control Varies with operating point Non-constant gain causes distortion Gain varies from one transistor.

CHEM*3440 Operational Amplifiers These integrated circuits form the backbone of modern instrumental methods. Understanding their operation will help you.

Operational Amplifiers Op Amps – a useful building block K. El-Ayat 11.

1 Amplifiers. Equivalent Circuit of a Voltage Amplifier G vo V i IoIo RoRo VoVo ViVi RiRi IiIi Amplifier ViVi VoVo (a) Black Box Representation.

SEM I 2008/09 LECTURE IV: C-E AC ANALYSIS II DMT 231 / 3 ELECTRONICS II Lecture IV AC Analysis II [BJT Common-Emitter Amplifier]

Differential Amplifiers

OP-AMP APPLICATIONS CONSTANT-GAIN MULTIPLIER CONTROLLED SOURCES INSTRUMENTATION AMPLIFIER.

CONSTANT-GAIN MULTIPLIER CONTROLLED SOURCES INSTRUMENTATION AMPLIFIER

Op-amp used as a summing amplifier or adder It is possible to apply more than one input signal to an inverting amplifier. This circuit will then add all.

OP-AMPs Op Amp is short for operational amplifier. An operational amplifier is modeled as a voltage controlled voltage source. An operational amplifier.

ECE201 Lect-131 Loop Analysis (7.8) Circuits with Op-Amps (3.3) Dr. Holbert October 9, 2001.

Operational Amplifier OpAmp

UMCP ENEE 204 Spring 2000, Lecture 30 1 Lecture #31 April 24 st, 2000 ENEE 204 Sections 0201 –0206 HW#11 due Friday April 28 th.

TECHNIQUES OF DC CIRCUIT ANALYSIS: SKEE 1023

BIOPOTENTIAL AMPLIFIERS

Feedback No feedback : Open loop (used in comparators)

Examples of Negative Feedback Applications: A) Inverting Amplifiers

1 The operational amplifier (“op amp”) Feedback Comparator circuits Ideal op amp Unity-gain voltage follower circuit.

TECHNIQUES OF DC CIRCUIT ANALYSIS: SKEE 1023

Introduction to the OP AMP

Introduction to the OP AMP

Presentation transcript:

Op Amp Applications 1EEE 3308 Analyses for A ∞ and loop gain are separate. Design breaks down into two parts: - Arranging A ∞ to do the job - Ensuring the feedback loop has enough loop gain and is stable. Here we focus on the A ∞ part, assuming you already know how to get a stable feedback loop.

Non-Inverting Amp 2 EEE 3308 R2R2 R1R1 vsvs vovo R out R in Ideal for Voltage Amp

Non-Inverting Amp 3 EEE 3308 R2R2 R1R1 vsvs vovo R out R in Ideal for Voltage Amp Voltage Follower vsvs vovo R out R in Ideal Voltage Buffer Inverting Amp with R 1 → ∞

Voltage Follower 4 EEE 3308 vsvs vovo R out R in Ideal Voltage Buffer In what sense is this “ideal”?

Voltage Follower 5 EEE 3308 vsvs vovo R out R in Ideal Voltage Buffer RFRF vsvs vovo RLRL RSRS Adding R S, R F or R L reduces T but has no effect on A ∞. Still A ∞ = 1. In what sense is this “ideal”?

Inverting Amp 6 EEE 3308 R2R2 vovo R out R in vsvs R1R1 Ideal for Voltage Amp

Inverting Amp 7 EEE 3308 R2R2 vovo R out R in Ideal for Voltage Amp vsvs R1R1 R2R2 vovo vsvs R1R1 RSRS

Inverting Amp 8 EEE 3308 R2R2 vovo R out R in Ideal for Voltage Amp vsvs R1R1 RBRB R2R2 vovo vsvs R1R1 RCRC RARA On the other hand, adding R A, R B or R C reduces T but has no effect on A ∞ = -R 2 /R 1

Summing Amp 9 EEE 3308 R2R2 vovo R1R1 v1v1 R2R2 v2v2 vnvn RnRn... T decreases with n:

I to V Converter/ Transimpedance Amp 10 EEE 3308 R2R2 vovo R out R in isis Ideal for Transimpedance Amp (i in, v out )

Current-Mode Outputs: Put load in series with the feedback signal path 11 EEE 3308 R2R2 R1R1 vsvs ioio R out

V to I Converter/ Transadmittance Amp 12 EEE 3308 R2R2 R1R1 vsvs ioio R out Ideal for Transadmittance Amp (v in, i out ) R in

V to I Converter/ Transadmittance Amp 13 EEE 3308 R2R2 R1R1 vsvs ioio R A, R B, R C, and R D reduce T but do not affect A ∞ = 1/R 1 RARA RCRC RBRB RDRD

Current Buffer 14 EEE 3308 R2R2 R out isis ioio R in Ideal for current in current out

Current Amplifier 15 EEE 3308 RLRL R3R3 ioio R2R2 isis

Current Amplifier 16 EEE 3308 RLRL R3R3 ioio R2R2 isis v3v3 virtual ground

Current Amplifier 17 EEE 3308 RLRL R3R3 ioio R2R2 isis v3v3 i3i3

Current Amplifier 18 EEE 3308 RLRL R3R3 ioio R2R2 isis v3v3 i3i3

Current Amplifier 19 EEE 3308 RLRL R3R3 ioio R2R2 isis v3v3 i3i3

Current Amplifier 20 EEE 3308 RLRL R3R3 ioio R2R2 isis

Current Amplifier 21 EEE 3308 RLRL R3R3 ioio R2R2 isis RARA RSRS RCRC RBRB RORO Adding R A, R B, R C, R S, or R O reduces T but has no effect on A ∞

Current-Mode Outputs: Put load in series with the feedback signal path 22 EEE 3308 R Load R1R1 vsvs ioio Later we’ll see that there is a different way to take current-mode outputs from a feedback circuit using transistors.