24-02-2023: Electronics 3

Date: Friday, February 24 2023

Location: Chip

Time: 10:45 - 12:30

color coded resistors

Question of the day

Which amplifier types do we distinguish and which do we need for the hearing loop system?

Knowledge Test

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Amplifiers: types and modeling of ideal behavior

Amplifiers: types

Electronic amplifiers are often used to interface with sensors and actuators. The nature of the input signal of the sensor or the output signal of an actuator, and the pysical operating mechanism of such transducers, tell us which electrical quantity (short-circuit current or open-circuit voltage) needs to be selected at the input port or at the output port of the amplifier.

Presentation

The presentation “Amplifier Types” introduces nine different unilateral amplifier types, based on the sensing and the driving properties of the input port and the output port, respectively.

Presentation in parts

Amplifier Types (parts)

Video

Amplifier Types (12:57)

Study

Chapter 2.2

Amplifiers: port isolation configurations

The functional behavior of the amplifier has been modeled while omitting the power port.

Presentation

The presentation “Amplifiers: port isolation configurations” gives types of amplifiers, based on intended connections between the amplifier ports.

Presentation in parts

Amplifiers: port isolation configurations (parts)

Video

EE3C11 lecture 3 Amplifier Port Isolation

Study

Chapter 2.2.2, 2.2.3

Amplifiers: modeling of the ideal behavior

Conceptually, amplifiers are intended to behave as linear, time-invariant systems. Although the supply of power is essential for their operation, the power port can be omitted when considering its functional operation only.

Presentation

In the presentation “Amplifiers: modeling ideal behavior” we will elucidate the use of the transmission-1 two-port representation for modeling of the functional (conceptual, or ideal) behavior of amplifiers. The use of these parameters results in clear design conclusions for making the source-to-load transfer independent of the source impedance and the load impedance. This is of particular interest if the voltage-current relation of the source or the load has a (partly) unpredictable character.

Presentation in parts

Amplifiers: modeling ideal behavior (parts)

Videos

  1. Amplifiers characterization and modeling of ideal behavior Two-port Model (12:09)

  2. Amplifiers characterization and modeling of ideal behavior Port Impedances (4:19)

  3. Definition of Available Power Gain (3:12)

  4. Amplifiers Generalized Two-port model (2:17)

Posters

  1. Amplifiers: ideal behavior

  2. Amplifiers: modeling and characterization

  3. Amplifiers: design of amplifier types

Study

Chapter 2.3

Amplifiers: determination of the T1 matrix parameters

A two-port model that is very suited for designing amplifiers is the T1 matrix. This representation uses a so-called anti-causal description in which the input voltage and the input current are taken as dependent variables, while the output port quantities are taken as independent variables.

Presentation

The presentation “Determination of the T1 matrix parameters” shows in which way the T1 matrix parameters can be obtained from circuit analysis done by hand or with the aid of SLiCAP.

Videos

EE3C11 lecture 3 Determination T1 matrix SLiCAP

Study

Chapter 2.3

Downloads

Please download the archive ABCD-test.zip with Jupyter notebook and the python script.

Homework

Homework 1: design high-level architectures for the hearing loop system. These architectures comprise antennas and amplifiers. For each amplifier, give the idealized values of their T1 matrix parameters.

For each architecture, discuss the influences of the inductance, the series resistance, and the parallel capacitance of the hearing loop antennas on the transfer.