Modeling and characterization of the non-ideal behavior of amplifiers

color coded resistors

Amplifiers: characterization of port isolation errors

Amplifiers: modeling of port isolation errors

At an early stage of the design process, we use relatively two-port models that describe the functional behavior of the amplifier. However, it is important to know the conditions under which electrical networks can be represented by such two-ports. If such conditions are not met, more eleborate description models are required and deviations from the ideal behavior should be well defined.

Presentation

The presentation “Amplifiers: port isolation errors” shows that the set of performance parameters that describes port isolation in practice, is often incomplete.

Presentation in parts

Amplifiers: port isolation errors (parts)

Video

Amplifiers modeling of port isolation errors (3:37)

Study

Chapter 2.4.1, 2.4.2

Amplifiers: modeling of the noise performance

Noise in electronic circuits

As all real-world systems, amplifiers add noise to the signal.

Presentation

The presentation “Noise in electronic circuits” briefly introduces noise mechanisms in electronic components and presents models and parameters for characterization of the noise behavior as well as noise analysis techniques.

Presentation in parts

Noise in electronic circuits (parts)

Videos

  1. Noise Mechanisms in Electronic Devices (6:11)

  2. Drawing Conventions for Noise Sources (2:14)

  3. Noise Parameters (5:14)

  4. Noisy Two ports (6:52)

  5. Amplifier Noise Design (4:07)

  6. Source Transformation Techniques (3:01)

  7. Influence of impedances in the signal path on noise performance (10:47)

Poster

  1. Random signal modeling and noise in electronic circuits

Study

Chapter 19

SLiCAP noise analysis

Presentation

The presentation “SLiCAP noise analysis” introduces the essentials of symbolic and numeric noise analysis in with SLiCAP.

Presentation in parts

SLiCAP noise analysis

Amplifiers: modeling of the drive capability and power efficiency

Amplifiers: modeling of power losses and energy storage

As all physical systems, amplifiers suffer from power losses and energy storage.

Presentation

The presentation “Amplifiers: power losses and energy storage” introduces high-level modeling techniques for such effects. It also briefly introduces a classification of amplifiers, based on the operation of the stage that drives the load.

Presentation in parts

Amplifiers: power losses and energy storage (parts)

Study

Chapter 2.4.4, 2.4.5

Amplifiers: voltage and current drive capability

The static and dynamic voltage and current drive capabilities of amplifiers are limited.

Presentation

The presentation “Amplifiers: voltage and current drive capability” gives description methods for these effects.

Presentation in parts

Amplifiers: voltage and current drive capability (parts)

Video

Amplifiers: voltage and current drive capability (5:37)

Study

Chapter 2.4.7, 2.4.8, 17.5, 17.7

Amplifiers: modeling of small-signal dynamic behavior

Amplifiers: modeling of small-signal dynamic behavior

As all physical systems, amplifiers impose limits to the rate of change of a physical signal. For small signals with a small rate of change, the amplifier can be considered as a linear time-invariant dynamic system and modeled accordingly.

Presentation

This presentation “Amplifiers: modeling of small-signal dynamic behavior” briefly summarizes analysis and characterization methods for such systems.

Presentation in parts

This presentation “Amplifiers: modeling of small-signal dynamic behavior (parts)

Videos

  1. Modeling of linear time-invariant dynamic systems (5:24)

  2. Poles and Zeros (4:10)

  3. Impulse and step response (3:04)

  4. Characterization of Linear time-invariant dynamic systems (2:07)

Study

Chapter 2.4.6, 17.4

Amplifiers: modeling of the weak nonlinearity

Amplifiers: modeling of weakly nonlinear behavior

At signal levels below clipping, amplifiers will not behave perfectly linear.

Presentation

The presentation “Amplifiers: modeling of weakly nonlinear behavior” gives description methods for weakly nonlinear behavior.

Presentation in parts

The presentation “Amplifiers: modeling of weakly nonlinear behavior (parts)

Video

Amplifiers modeling of weakly nonlinear behavior (13:03)

Study

Chapter 17.5, 17.7