Analogue circuits are circuits used to transmit, transform, process, amplify, measure and display analogue signals. An analogue signal is an electrical signal that varies continuously. Analogue circuits are the basis of electronic circuits, which mainly include amplification circuits, signal operation and processing circuits, oscillation circuits, modulation and demodulation circuits and power supplies.
Features
Functions that take on an infinite number of values.
when the image information and sound information change, the waveform of the signal also changes, i.e. the information to be propagated by the analogue signal is contained in its waveform (the pattern of information change is directly reflected in the change of amplitude, frequency and phase of the analogue signal).
Primary analogue circuits address two broad aspects: 1. amplification and 2. the signal source.
The analogue signal has continuity.
Classification
Analogue circuits can be divided into two main categories: standard analogue circuits and specialised analogue circuits (applicaTIon spacific analogue ICs).
Standard analogue circuits include amplifier interface circuits, data converters, comparators, voltage regulators and reference circuits.
The dedicated analogue circuit market refers to circuits used in consumer electronics, computers, communications, automotive and other sectors of industry.
Seven types of basic analogue circuits
- Bridge rectifier circuits
- Power filters
- Signal filters
- Differential and integral circuits
- Common emitter amplifier circuit
- Divided bias common emitter amplifier circuit
- LC oscillation circuit
