Traditional (analogue) electronic circuits are those that operate by continuously adjusting analogue voltages and currents, as opposed to digital circuits which change voltage or current in discrete steps. In the simplest example, an LED (light-emitting diode) can be driven by a battery and controlled by an analogue circuit passing current through it. The intensity of the light and therefore its brightness can be varied continuously with no distinct steps or levels as in digital control.
Analogue electronics continues to play a role in many technology applications today, especially where high precision or direct control is needed over a continuous range of parameter values. Applications include controlled lighting and dimming, analogue circuits are important in the design of mass-market electronic devices such as radios, televisions and portable music players.
Analogue signals are continuous rather than discrete. They represent quantities by a continuously varying physical quantity e.g. an angle, a pressure or a temperature. Analogue signals do not need to be converted into discrete form whereas digital signals must be discretized in order to be stored in memory or transmitted over transmission lines such as coaxial cables and optical fibers.
Analogue electronics are most often found in the following applications:
(i) Industrial process control and automation, e.g. gas flow meters that measure the rate at which gas is flowing through them.
(ii) Control of machinery by analogue signals supplied directly from a transducer e.g. a pressure sensor mounted on a hydraulic cylinder that converts the pressure exerted on it into an analogue signal which can be used to control machinery.
(iii) Control of lighting and other industrial equipment using analogue variable resistors, for example dimmers, power-factor correction schemes in electrical distribution grids.
Analogue circuitry is also used when a completely flexible approach to solving a problem is required. A combination of analogue and digital circuits can often be used to best effect.
Analogue electronics continue to play a role in many technology applications today, especially where high precision or direct control is needed over a continuous range of parameter values. Applications include controlled lighting and dimming, analogue circuits are important in the design of mass-market electronic devices such as radios, televisions and portable music players. Analogue signal processing has the following advantages over digital signal processing (DSP):
(i) Analog circuits can respond to any waveform of a given frequency whereas a DSP must be programmed into specific algorithms to process different types of signals.
(ii) The processing of the output from analogue circuits is more easily visualized and understood than that of a DSP.
(iii) Many complex processes have both an analogue component and a digital component. For example, an amplifier may have high-frequency response that can be modelled digitally using finite impulse response (FIR) filters. The low frequency responses are usually controlled by analogue circuits.
(iv) Complex control systems that require a high degree of flexibility like those in flight controls and for example submarines often use both analogue and digital elements.
Various Topics On Which Analog Assignment Help Is Offered Are
Below are a few areas covered in Analogue Electronics:
A resistor is an electrical component that controls the flow of current by converting electrical energy into heat through Joule heating. Its value affects its resistance to current flow. The unit for resistor is given in ohms Ω (Greek capital omega). It’s symbol “R” denotes the ohm, which is the resistance offered by that resistor. There are various types of resistors available on the market with each one having its own intended area of application. For instance, there are single-turn resistors, multi-turn resistors and wire wound resistors.
An electrolytic capacitor consists of two or more alternating layers of metal and paper separated by a paste-like electrolyte. It is mainly used for filtering and coupling applications, where it is employed to block DC signals while allowing AC signals to pass through. The capacitor consists of two conductive electrodes which are coated with an insulator (the electrolyte) sandwiched between them. These electrodes are connected to the electrical circuit in such a way that they act as the two plates of a capacitor. In this arrangement, with AC signals, the positive charges will keep moving from one electrode to the other while the negative charges will always be on one plate and will not be able to move.
An electromagnetic relay is an electrical device which has the capability of responding to an electric signal and then opening or closing circuits. It is a mechanical actuator that uses a coil and two sets of contacts for switching purpose. One set of contacts is used for making connections while another one acts as an on-off switch. When electricity passes through the coil, it becomes magnetic and attracts a lever which then moves a contact to another set. With this, the circuit is completed or interrupted as desired.
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An electromagnetic locking device consists of an electromagnet that gets energised when electricity flows through it. It functions by having a thread-like cylinder lined with iron which rotates around its axis within a slot. An armature is attached to it that gets pulled into the magnet when electricity flows through it. This positioning of the armature then interacts with a switch in such a way that it completes or interrupts the circuit as desired.
A switch is an electrical device that will allow the flow of electric current in a circuit when it’s placed in an on position while blocking it when it’s moved to off position. There are various types of switches available such as single-pole, double-poles and multi-poles. In addition, they are also classified according to their operating characteristics. For example, they can be placed into categories such as push button switches and rotary switches.
An electrical connector is a device that has the ability to join two or more wires together while maintaining an uninterrupted connection with them. There are many different types of connectors available with the most common ones being jacks, plugs and sockets.
An electrical transformer consists of two coils of insulated wire wrapped around an iron core. It is mainly used for transforming electric current from one voltage level to another without any changes in its frequency. This is why it’s commonly called a voltage transformer or current transformer. In its operation, one coil of the transformer is made part of the circuit, while another one is kept out. As a result of this arrangement, there will be an alternating magnetic field that’s created between these two coils. This in turn induces an alternating electric current in the second coil which matches the voltage of that first-connected coil.
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Analogue Electronics Assignment
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