ECE3204 D2015 Microelectronics II

• Course Information
• Academic Honesty
• Course Outcomes
• Lecture Outline
• Term Calendar
  
• Weekly Help Schedule
  

The Microelectronics II Mantra (repeat daily):

IF	an op-amp circuit is connected for negative feedback,
AND	the op-amp open-loop gain A is sufficiently high,
THEN	the op-amp input voltages v- ~ v+ are approximately equal.

Labs

1. Lab 1 (3/25/15)
   • Peak-to-peak Measurement Caution
     
   • Rise Time Measurement Tips
     
   • LM741 Op-Amp Data Sheet
   • LTE-302  IR LED Data Sheet
   • LTR-516AD Photodiode Data Sheet
     
   
   
2. Lab 2 (4/1/15)
   
   
3. Lab 3 (4/8/15)
   
   
4. Lab 4 (4/15/15)
   
   
5. Lab 5 (4/22/15)
   
   
6. Lab 6 (4/29/15)
   
   

 Problem Sets

pSpice Help

• pSpice HW Set 1 example circuit
  
• Link to helpful pSpice tutorial from UTA
  (although note that their method of doing Thevenin is different and not as general as the one demonstrated in ECE3204)
• Lecture capture
  
• .cir text file from example

Practice Exams

• EE3204 D2009 Exam 1
• EE3204 D2009 Exam 1 Solution
• EE3204 D2009 Exam 2
• EE3204 D2009 Exam 2 Solution
• EE3204 D2009 Exam 3
• EE3204 D2009 Exam 3 Solution
  

Exam Solutions

1. Exam 1 (4/7/2015)
2. Exam 2 (4/21/2015)
3. Exam 3 (5/5/2015)
   

Link to Lecture Captures

Handouts by Date

Date	Lec	Handouts	Annotations
Mon Mar 16	1	Course Information Academic Honesty Course Outcomes Lecture Outline Term Calendar Weekly Help Schedule KVL-KCL Review Nodal Analysis Example Superposition Review (from 2019) Thevenin's Theorem	Motivation: Digital Audio Signal Chain 2 Big System Questions: How Big?  How Fast?
Tue Mar 17 ☘	2	Lecture Overview | Why Amplify? | Transducers | General Amplifier Model Ideal Op-Amp	Annotated Slides
Thu Mar 19	3	Open Loop vs. Closed Loop Gain Comparison LM741 Data Sheet	Annotated Slides
Fri Mar 20	4	Lecture Overview | Blank Slides	Annotated Slides
Mon Mar 23	5	Lecture Overview | Blank Slides Transfer Function Review Bode Plot Guide Step Response of 1st Order System Bandwidth - Risetime Relationship Op-Amp as a Classical Feedback System Complex Number Review	Lecture Overview | "Language" of Transfer Function | Annotated Noninverting, Inverting Gain Analysis Handout Annotated Noninverting Gain Handout for Noninverting Gain = +100 Amplifier Scope Photos: f = 100 Hz  vI vO v- f = 1kHz     vI vO v- f = 10 kHz  Note reduced gain to output |H(10kHz)| = 75 Phase shift at output Inverting input v- unable to track v+=vI vI vO v- Annotated Transfer Function Review Handout (pp. 1-6)
Tue Mar 24	6	Lecture Overview Bode Plot Form	Closed Loop Bandwidth | Completed Bode Plot Form Annotated Transfer Function Review Handout (pp. 7-10) Annotated Step Response, Bandwidth - Risetime handouts
Thu Mar 26	7	Lecture Overview | Amplifier Design Example Op-Amp Error Matrix LF356 Op-Amp Data Sheet	Annotated "Op-Amp as a Classical Feedback System" Annotated Design Example Slides Annotated Error Matrix
Fri Mar 27	8	Lecture Overview Offset, Bias Current DC Errors Slew Rate Limiting Links to Op-Amp Selection Guides Analog Devices Linear Technology Texas Instruments	Annotated Slides
Mon Mar 30	9		Annotated Slides Annotated Inverting Gain Handout for Inverting Gain = -10 Amplifier Scope Photos: f = 100 Hz vO OK vI vO v- f = 100 Hz vO too big Note clipping at output When vO clipping, unable to keep inverting input v- at virtual ground vI vO v- Step Reponse Slew Rate Limiting vI vO v- Sine Wave Slew Rate Limiting  vI vO
Tue Mar 31	10		Annotated Slides
Thu Apr 2	11	Lecture Overview | Lab 2 Circuits LM311 Comparator Data Sheet	Annotated Slides Active Filter, Integrator Square Wave response Scope Photos: Active Filter f3dB = 1.6 kHz fSQ << f3dB vI vO Active Filter f3dB = 1.6 kHz Note that output looks "almost like"triangle wave; fundamental and harmonics of fSQ >> f3dB vI vO Pure integrator output Note clipping at - rail since DC errors integrated vI vO Annotated Push-Pull Amplifier Handout for Scope Photos: Feedback from P (op-amp output) vI vP vQ Feedback from Q (at 8Ω load)   vI vP vQ Closeup of zero crossing waveform Note small crossover distortion as op-amp output swings from -0.7V to +0.7V vI vP vQ
Fri Apr 3	12	Lecture Overview | Comparator, Schmitt Trigger	Annotated Comparator | Schmitt Trigger Handout for Scope Photos: Comparator (note slow vO transition) vI vO Schmitt Trigger (faster vO transition)   vI vO Schmitt Trigger  Note how positive feedback drives v+ away from v- once transition starts vI vO v+ v-
Mon Apr 6	13		Annotated Slides
Thu Apr 9	14	Lecture Overview | Handout Slides LM555 Block Diagram LM555 Data Sheet	Annotated Slides
Fri Apr 10	15	Lecture Overview | Handout Slides	Annotated Slides
Mon Apr 13	16	Lecture Overview | Handout Slides Lab 4 Circuits Lab 4 Circuits pSpice handout	Annotated Slides Annotated Simulation Figures Annotated Sample-and-Hold Circuit for Scope Photos: Sample-and-Hold Waveforms vGEN vGATE vCAP
Tue Apr 14	17	D/A converters Binary Weighted R R-2R Ladder	Annotated Slides: 2:1 Analog Multiplexer | Sample-and-Hold Simulations | D/A Converter
Thu Apr 16	18	s-plane Notes	D/A Converters Annotated s-Plane Notes
Fri Apr 17	19	Filter Type and Specification Comparison of Filter Family Transfer Functions Sallen and Key Circuit 5th order Butterworth Design Example 3rd order Butterworth Design Example	Annotated Slides: Filter types and families Sallen and Key circuit Butterworth filter design examples Exam 2 preview examples
Fri Apr 24	20	Finding Loop Gain / Stability Analysis Handout Notes on Textbook Stability Reading (6th ed.)	Annotated Slides Differentiator Scope Photos: Pure Differentiator Full waveform Zoomed Zoomed with frequency vIN vOUT Practical Differentiator vIN vOUT
Mon Apr 27	21	Lecture Overview | Intuitive Stability Practical Differentiator	Annotated Slides: Finish Stability Analysis from Lecture 20 | Practical Differentiator
Tue Apr 28	22	Lecture Overview | Wien Bridge Oscillator MATLAB for phase margin cases	Annotated Slides: Finish Practical Differentiator Wien Bridge Oscillator Wien Bridge (no AGC) waveforms: Exponentially Growing Amplitude Exponentially Decaying Amplitude vOUT
Thu Apr 30	23	Lecture Overview | Phase Margin Examples	Annotated Slides Annotated AGC Circuit for Scope Photos: Wien Bridge with AGC Waveforms Zoomed in on AC coupled vG v1 vOUT vR vG BONUS CONTENT!!! Phase Margin / Pole Angle Relationship
Fri May 1	24	Lecture Overview	Annotated Slides
Mon May 4	25	Lecture Overview ADC Overview Flash ADC Ramp ADCs Successive Approximation ADC	Annotated Slides
	Pre-Exam-3 Help Session		Example problems: "Predictor" Circuit: Input-Output Relationship | Stability Analysis Sample-and-Hold: Waveforms | Acquisition | What if Op-Amp Isn't There? D/A Converter