Switching Components and Circuits

The aims of this module are: 1. to acquire simple calculation methods for predicting the switching behavior of circuits, in order to verify the validity of experimental results or those obtained by simulation, 2. to know and be able to use switching models of passive and active elements, 3. to know the limiting elements encountered in switching electronics, 4. to be able to carry out the study of a switching circuit, 5. to fix the knowledge being acquired during tutorials.

EA107 - General Electronics
EA118 - Circuits and Systems I
PH108 - Physics for Electronics
EA116 - Introduction to Integrated Electronics

1. Introduction: Fields of application for switching circuits
2. Study of circuits in switching operation
- Principle
- Methods for calculating linear circuits in transient operation
- Response of circuits to an instantaneous transition (variation diagram method, instantaneous diagram method)
3. First-order pulse circuits (reminder)
4. Active components in switching mode
-The diode in switching mode: characteristics, recovery time, different types of switching diodes
-Transistors in switching mode:
-The bipolar transistor: Introduction, Carrier concentration diagram in the base, Switching in a current-controlled emitter-common stage, Switching in a voltage-controlled emitter-common stage, Transistor response in switching mode, Transistor equivalent diagrams in static mode.
-The field-effect transistor: Introduction, Carrier concentration diagram in the base, Transistor response in switching mode, Transistor equivalent diagrams in static mode.The field-effect transistor: Linearization of the static characteristics of a FET, Equivalent schematics in static operation, Influence of the transistor's internal capacitances.
5. Examples and applications of circuits in switching operation
- Application of the diode in switching operation (clamping, diode pump)
- The bipolar transistor with capacitive or inductive load
- Study of a circuit with MOS-FET operating in switching operation, analog switch
6. Multivibrator circuits
- Operating principles
- Astables and monostables with CMOS logic gates
7. Conclusions : Use of astable in VCO, awareness of switched capacitors

Analog electronics
Switching electronics

Course handout
TD collection
Recommended books:
- MILLMAN and TAUB: Pulse and Switching Waveforms
- VABRE: Electronique des Impulsions