ELT 161 Linear IC Fundamentals

Lecture Hours: 3
Lab Hours: 3
Credits: 4

Introduces linear integrated circuit amplifiers. Emphasizes device parameters and basic circuit operating characteristics. Includes linear integrated circuit amplifying devices for comparison and evaluation through laboratory experiments. Promotes and supports sustainable and green technologies.

Prerequisite: ELT 132 and ELT 141, each with a grade of C or better; or consent of instructor.
Corequisite: ELT 133 and ELT 142.
Student Learning Outcomes:

Describe and apply the operating principles and characteristics of linear IC devices.
Evaluate linear IC device parameters and the operation of some fundamental amplifier circuits.
Gather and organize experimental data into formal technical lab reports.

Content Outline

Introduction to Linear Integrated Circuit Amplifiers
- Fabrication
- Packaging
- Types of integrated circuits
- Manufacturers’ numbering and device type designation
Fundamentals of Operational Amplifiers
- Symbol of a single input amplifier
- Schematic symbol of an operational amplifier
- The ideal operational amplifier characteristics
- Typical internal block diagram of the operational amplifier
- Controlling the gain of the ideal Op Amp with external feedback
- Closed-loop gain formulas and feedback ratios
- Inverting and non-inverting amplifier circuit configurations
Practical Operational Amplifiers
- Negative feedback voltage and current
- Virtual ground summing point
- Circuit input impedance with negative feedback
- Op Amp output impedance with negative feedback
- DC input bias currents
- Interpretation of manufacturers’ data sheets
- Input offset currents/cause and correction
- Input offset voltage/cause and correction
- Internal schematic diagram of a 741 Op Amp
- Basic discrete differential amplifier operation
- Current mirrors and constant current sources
Practical Op Amp Differential Amplifiers
- Differential voltage gain ratio
- Input voltage differential mode
- Common mode voltage gain ratio
- Input voltage common mode
- Common mode rejection (CMR)
- Common mode rejection ratio (CMRR)
- Circuit input impedance
Summing Amplifiers
- Unity-gain summing amplifier/inverting
- Circuit input impedance
- Weighted summing amplifier or scaling adder
- Summing amplifier/non-inverting
- Circuit input impedance
- Averaging amplifier/inverting
- Averaging amplifier/non-inverting
Voltage Followers
- DC coupled follower
- AC coupled follower
- Circuit input impedance
- Bootstrapped follower
- Voltage gain
AC Characteristic of Op Amps
- Slew rates
- Open-loop bandwidth
- Closed-loop bandwidth
- Unity-gain bandwidth
- Gain-bandwidth product
- Frequency compensation techniques
- Comparison of 741,301,318 Op Amps
Single Supply Amplifiers
- Input offset reference voltage
- Inverting amplifier
- Non-inverting amplifier
- Designed single supply Op Amp/The LM324
- AC coupled amplifier
- DC coupled amplifier
Norton Current Amplifiers (Current-Differencing Amplifiers - CDAs)
- Schematic symbol for a differential current amplifier
- The LM3900 Current-Differencing Amplifier
- Internal LM3900 IC construction
- Internal LM3900 IC parameters
- Inverting amplifier
- Non-inverting amplifier
- Differential current amplifier
Op Amp Voltage Regulators
- Classification of regulators
  - Series pass regulation
  - Shunt regulation
  - Switching regulation
- Op Amp series-pass regulator with current boost
- Three-terminal IC regulators - LM309, LM317, LM7805
- IC voltage regulators with adjustable output/LM723
- Voltage regulators with current limiting and foldback current limiting
- Tracking voltage regulators
- Switching regulators
  - Free running
  - Pulse-width modulation
  - Step-down switching regulator
  - Step-up switching regulator
  - Inverting switching regulator
Relation to Sustainable and Green Technologies