Definition: AC voltmeters are designed in a manner so that they can measure the AC voltage under measurement. The main difference between AC voltmeter circuit and DC voltmeter circuit is the usage of a rectifier. The rectifier is used in order to transform the AC voltage into DC voltage. Block Diagram of AC Voltmeter To develop a basic understanding of AC voltmeter, it is crucial to have a brief idea of the block diagram of AC voltmeter circuit. The block diagram of AC voltmeter resembles the … [Read more...] about AC Voltmeter
LCR Meter
Definition: LCR meters can be understood as a multimeter, this is because it can measure resistance, inductance, capacitance as per the requirement. Thus, it is termed as LCR meter. L in its name signifies inductance, C stands for capacitance and R denotes resistance. The significant component of LCR meter is the Wheatstone bridge and RC ratio arm circuits. The component whose value is to be measured is connected in one of the arms of the bridge. There are different provisions for the … [Read more...] about LCR Meter
DC Voltmeter
Definition: The DC voltmeter is a device which measures the DC voltage applied to it, by moving the pointer against the perfectly calibrated scale. The calibrated scale is provided by PMMC meter. Also, you must note here that the voltage which is to be measured is passed through the attenuator and then through the DC gain amplifier. In order to understand the working of DC voltmeter, we may refer to the block diagram below. We can conclude from the diagram below that when the DC voltage is … [Read more...] about DC Voltmeter
Half Subtractor
Definition: The Half Subtractor is a digital circuit which processes the subtraction of two 1-bit numbers. In this, the two numbers involved are termed as subtrahend and minuend. In the subtraction procedure, the subtrahend will be subtracted from minuend. The circuit of Half subtractor consists of two inputs and two outputs. The inputs of the half subtractor circuit will be subtrahend and minuend. On the other hand, the output will be the difference and the borrow. The word “HALF” before … [Read more...] about Half Subtractor
Difference between Amplifier and Repeater
The major difference between amplifier and repeater is that an amplifier amplifies the weak signal and the noise associated with this signal also gets amplified. On the contrary, the repeater does not amplify the noise signal. Although a receiver also consists of an amplifier in it but apart from this it also possess a signal reshaping circuit which reshapes the distorted signal and amplifies the undistorted signal. One may think why these amplifiers and repeaters are used in electronic … [Read more...] about Difference between Amplifier and Repeater
Field Effect Transistor (FET)
Definition: FET is an acronym used for “field effect transistor”. It is a three terminal unipolar device in which conduction is manipulated with the help of applied electric field. The name itself gives a brief idea about its working principle, “field effect”, these two words clearly indicates it is a transistor controlled by electric field. Thus, it is also referred as a voltage controlled device in which only majority charge carriers are involved in the conduction mechanism. It comprises of … [Read more...] about Field Effect Transistor (FET)
Electronic Multimeter
Definition: The Electronic Multimeter is a device which is used for the measurement of various electrical and electronic quantities such as current, voltage, resistance etc. The multimeter name is given to it to define its ability to measure multiple quantities. It is provided with inbuilt power supply necessary for the functioning of the device. Any component such as a resistor, battery can be connected to its outer probes for the measurement of the electronic quantity. In order to … [Read more...] about Electronic Multimeter
Difference between Demultiplexer and Decoder
The main difference between demultiplexer and decoder is that a demultiplexer is a combinational circuit which accepts only one input and directs it into one of the several outputs. On the contrary, the decoder is a combinational circuit which can accept many inputs and generate the decoded output. The demultiplexer has selection lines to allow the input to follow one of the selected paths for generating it at the output. The decoder does not possess any selection lines as it has nothing to … [Read more...] about Difference between Demultiplexer and Decoder
Clapp Oscillator
Definition: The Clapp Oscillator is an electronic device that consists of single stage amplifier and a phase shift network.The basic function of an oscillator is to generate the sinusoidal signal and the same work a Clapp oscillator does. With the help of amplifier circuit, it provides the amplified signal to the phase shift network. This in return provides regenerative feedback to the amplifier circuit and thus sustained oscillations are produced. Have a look at the block diagram … [Read more...] about Clapp Oscillator
Oscillator
Definition: Oscillator is a circuit which utilizes positive feedback amplifier to generate sinusoidal waveforms of fixed amplitude and frequency. It is the major source of power in electrical and electronic instruments. The amplifier provided with the positive feedback can generate the sinusoidal signal even in the absence of any input. These signals are termed as oscillations, and hence the device is known as an oscillator. The positive feedback here implies the addition of some part of the … [Read more...] about Oscillator