Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Temperature Independent Ref (Band Gap)

In course

EE-423: Low power electronics: analog mixed signal design

This course deals with the analyze, design and optimization of CMOS analog circuits, emphasizing low-power solutions required in a broad range of applications (e.g. IoT, wearables, Biosensors ...). Some examples of mixed-signal design are also addressed. ...

Description

This lecture covers the design and analysis of temperature-independent references, focusing on the implementation of supply-independent biasing circuits for band gap references. It discusses the concepts of Positive-TC Ref (PTAT) and Negative-TC Ref (CTAT), as well as the generation of Band Gap Reference Design. The lecture also explores alternative BGR topologies for low-voltage ICs and the use of diode-referenced self-biasing circuits. Various circuit implementations and their temperature dependencies are analyzed, emphasizing the importance of PTAT and CTAT parameters in achieving temperature-independent references.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Instructor

Adil Koukab

Official source

Related concepts (32)

Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance). It has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other. A semiconductor diode, the most commonly used type today, is a crystalline piece of semiconductor material with a p–n junction connected to two electrical terminals. It has an exponential current–voltage characteristic. Semiconductor diodes were the first semiconductor electronic devices.

Temperature

Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.

Schottky diode

The Schottky diode (named after the German physicist Walter H. Schottky), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. It has a low forward voltage drop and a very fast switching action. The cat's-whisker detectors used in the early days of wireless and metal rectifiers used in early power applications can be considered primitive Schottky diodes. When sufficient forward voltage is applied, a current flows in the forward direction.

Diode bridge

A diode bridge is a bridge rectifier circuit of four diodes that is used in the process of converting alternating current (AC) from the input terminals to direct current (DC, i.e. fixed polarity) on the output terminals. Its function is to convert the negative voltage portions of the AC waveform to positive voltage, after which a low-pass filter can be used to smooth the result into DC. When used in its most common application, for conversion of an alternating-current (AC) input into a direct-current (DC) output, it is known as a bridge rectifier.

Negative temperature

Certain systems can achieve negative thermodynamic temperature; that is, their temperature can be expressed as a negative quantity on the Kelvin or Rankine scales. This should be distinguished from temperatures expressed as negative numbers on non-thermodynamic Celsius or Fahrenheit scales, which are nevertheless higher than absolute zero. The absolute temperature (Kelvin) scale can be understood loosely as a measure of average kinetic energy. Usually, system temperatures are positive.

Related lectures (32)

Junction Diode: Physical Principles

Explores the physical principles of the junction diode, including energy levels, doping, conduction mechanisms, and diode characteristics.

Semiconductor Physics: Diodes and Solar Cells

Explores semiconductor physics, diodes, breakdown voltage, and solar cell efficiency, emphasizing the real I-V characteristics and the features of specific diodes and solar cells.

Semiconductor Physics: Transistors and Diodes

Explores semiconductor physics, emphasizing transistors and diodes' behavior and operation.

Temperature and Agitation Analysis

Covers the analysis of temperature and agitation in a controlled chamber.

Voltage References: Zener Diode vs Band-Gap MOOC: Electronics II