A figure of merit is a quantity used to characterize the performance of a device, system or method, relative to its alternatives. In engineering, figures of merit are often defined for particular materials or devices in order to determine their relative utility for an application.

What is the importance of figure of merit in communication?

The ratio of output SNR and input SNR can be termed as Figure of Merit. It is denoted by F. It describes the performance of a device. It is so because for a receiver, the channel is the input.

What is a good figure of merit?

In short, I would say that: A good figure-of-merit should accurately reflect the merits of the ADC in the context and for the purpose which the figure-of-merit is used.

How is figure of merit calculated?

Figure of merit of the galvanometer :

Adjust the value of R such that the galvanometer shows a certain deflection. ... Repeat the experiment by changing the value of R and note the galvanometer deflection each time. We can find the figure of merit of the galvanometer by using the equation, k= E/(R+G)θ.

What is meant by figure of merit of a receiver?

The figure of merit 'γ' is the ratio of output signal to noise ratio to input signal to noise ratio of a receiver system.

Introduction to Thermoelectricity L1.6: Theory - Figure of Merit

15 related questions found

What is SNR formula?

So, if your SNR measurements are already in decibel form, then you can subtract the noise quantity from the desired signal: SNR = S - N. ... Furthermore, for power, SNR = 20 log (S ÷ N) and for voltage, SNR = 10 log (S ÷ N). Also, the resulting calculation is the SNR in decibels.

What are 5 major figures of merit that can be used as basis in the selection of an instrument?

Figures of merit are a way for analytical chemists to characterize a method. The six figures of merit we will use are precision, accuracy, sensitivity, linear dynamic range, detection limit, and selectivity.

What is Theta in figure of merit?

θ = deflection angle. N = Total no. of turns in coil. B = Magnetic field. A = Area of coil.

What is figure of merit galvanometer?

The figure of merit of a galvanometer can be defined as a current required to produce unit deflection in the galvanometer scale. The figure of merit is denoted by the symbol k.

What is the meaning of merit in measurement?

: a numerical quantity based on one or more characteristics of a system or device that represents a measure of efficiency or effectiveness.

What is figure of merit of MOS transistor?

“Figure of merit” (FOM) is a way of evaluating FETs. It accounts for both their conduction losses and their switching losses. Commonly, it's calculated as on-resistance (R_(DS)ON) times gate charge (Q_G). Q_G is the charge that must be brought to the gate of the MOSFET to turn it fully on.

What is figure of merit in terms of speed and power?

A figure of merit used to describe the ability of a particular combination of camera, film, oscilloscope, and phosphor to record a high-speed trace.

What is the significance of figure of merit of a galvanometer?

Galvanometer deflection is proportional to the amount of current passed through it. Figure of merit of a galvanometer is the reciprocal of current sensitivity. Galvanometer has positive and negative terminals. The resistance of the coil of the galvanometer is called the resistance of the galvanometer.

What is the figure of merit in physics?

Figure of merit is in general is the numerical value representing the degree of effectiveness or efficiency of an instrument approximated by different estimation techniques.

Is figure of merit same as galvanometer constant?

The restoring torque per unit twist is given as 'k' which is a galvanometer constant. Figure of merit is given as 'K' which is defined as the deflection produced per unit current.

What is E in Figure of Merit?

The figure of merit , K =E /[(R+G)Q] (2) Where E is the end of the cell and Q is the deflection produced with resistance R. The maximum current that can pass through the galvanometer , I_g=nk.

Will you prefer a low or high resistance of a shunt?

》The Low Resistance is preferred over high for Shunt

Galvanometer is a device which is used measure electric currents.

What is meter bridge?

A meter bridge also called a slide wire bridge is an instrument that works on the principle of a Wheatstone bridge. A meter bridge is used in finding the unknown resistance of a conductor as that of in a Wheatstone bridge.

What is the importance of analytical chemistry?

Analytical chemistry plays an enormous role in our society, such as in drug manufacturing, process control in industry, environmental monitoring, medical diagnostics, food production, and forensic surveys. It is also of great importance in different research areas.

Why is sensitivity important in analytical chemistry?

Sensitivity. The ability to demonstrate that two samples have different amounts of analyte is an essential part of many analyses. ... For two methods with the same ΔSA, the method with the greater sensitivity—that is, the method with the larger k_A—is better able to discriminate between smaller amounts of analyte.

Why is sampling important in analytical chemistry?

Without representative sampling, measurement uncertainty is compromised. ... The purpose of sampling is to extract a representative amount of material from a 'lot' – the 'sampling target'. It is clear that sampling must and can only be optimized before analysis.

What is RF noise figure?

Noise figure is a measure of the degradation in signal to noise ratio and it can be used in association with radio receiver sensitivity and it is an essential element of the RF circuit design of any radio receiver.

What is RMS noise?

RMS or root mean square is defined as the average. In terms of noise, it is defined as the process used to determine the average power output (continuous waveform) over a long period of time.

Is high SNR good or bad?

To achieve a reliable connection, the signal level has to be significantly greater than the noise level. An SNR greater than 40 dB is considered excellent, whereas a SNR below 15 dB may result in a slow, unreliable connection.

What is the figure of merit and how it is related to current sensitivity?

Current sensitivity (Figure of merit): The figure of merit or current sensitivity of a moving coil galvanometer is the current required to produce a deflection of 1 mm on a scale kept at a distance of 1 m from the mirror. It is expressed in μA/mm.