## User: Gayathri S

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#### Posts by Gayathri S

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... Q) Give comparison between voltage and power amplifier | SL.NO | Parameters | Small signal amplifier | Power amplifier | |-------|--------------------------|------------------------------------------------- ...
written 6 weeks ago by Gayathri S0
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... **Introduction** - The field effect transistor(FET) is three terminal device. - It is also known as 'unipolar' transistor - FET has many applications as that of BJT's - Following table shows comparative study of BJT and FET | | Parameters | BJT(Bipolar) ...
written 6 weeks ago by Gayathri S0
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... - In f/b amplifier, if f/b signal is applied in such a way that it is in phase with the i/p signal, then it is called positive feedback. This positive feedback results in a feedback(A$_{f}$) to be greater than open loop gain(A). It results into instability and operates as an oscillator circuit. ** ...
written 6 weeks ago by Gayathri S0
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... **Q) State need of multistage amplifier** The voltage gain or current gain obtained from single transistor amplifier is usually not sufficient for most of the applications. - Hence several amplifier stages are connected in cascade. i.e connected such that the output of one stage forms input of th ...
written 6 weeks ago by Gayathri S0
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... **Feedback** It is a process in which part of output is sampled and fed back to the input. **Feedback Amplifiers** - The amplifiers which uses feedback principle are called 'feedback amplifiers'. Q) List and explain two types of feedback. - Depending upon whether the feedback signal increases ...
written 7 weeks ago by Gayathri S0
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... **(A) Darlington connection** - It is a popular connection of two BJT's to obtain one 'super beta' transistor. - It is shown in following figure: ![enter image description here][1] - Let, $\beta_{1}$ is gain of transistor Q$_{1}$ & $\beta_{2}$ is gain of transistor Q$_{2}$ Then, due to d ...
written 7 weeks ago by Gayathri S0
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... ![enter image description here][1] This simple enhancement-mode common source mosfet amplifier configuration uses a single supply at the drain and generates the required gate voltage, V$_{G}$  using a resistor divider. We remember that for a MOSFET, no current flows into the gate terminal and from ...
written 7 weeks ago by Gayathri S0
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... When the ratio of inner diameter of the cylinder to the thickness is less than 15, the cylinder is called as a **'thick-walled'** cylinder or simply **'thick'** cylinder. **Examples**-Hydraulic Cylinders, high pressure pipes, gun barrel **Formulae list:-** (1) $\sigma_{t}$ = Tangential stress(Ten ...
written 7 weeks ago by Gayathri S0 • updated 22 days ago by Sanket Shingote ♦♦ 250
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... **Q.1 Find the diameter of rivet, if the maximm shear stress in the rivet is limited to $60\ N/mm^2$. The max. load carried by the bracket is $42\ kN$. at an eccentricity of $200\ mm$.** ![enter image description here][1] Soln. (I) Primary effect -- \$F_{P} = \frac{P}{n} = \frac{42 \times 10^3}{6 ...
written 7 weeks ago by Gayathri S0 • updated 17 days ago by Sanket Shingote ♦♦ 250
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