The Q-factor is the quality factor of an amplifier. The exact mathematical definition may vary depending on what type of amp it is. Basically, it means how well it passes what it is supposed to pass, and how well it rejects what it is supposed to reject.
The SR flip-flop is a bistable device that can exist in an on state or an off state. The two inputs cause it to set or reset.
2006-06-20 05:10:26
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answer #1
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answered by sideshot72 3
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The Q factor or quality factor is a measure of the rate at which a vibrating system dissipates its energy into heat. A higher Q indicates a lower rate of heat dissipation. For example, a pendulum suspended from a high-quality bearing, oscillating in air, would have a high Q, while a pendulum immersed in oil would have a low one. For very strong damping, Q<1, the system is so strongly damped that it never completes a single oscillation, and in the limit of Q=0, it simply decays exponentially toward equilibrium.
When the system is driven, its resonant behavior depends strongly on Q. Resonant systems respond to frequencies close to their natural frequency much more strongly than they respond to other frequencies. A system with a high Q resonates with a greater amplitude (at the resonant frequency) than one with a low Q factor, and its response falls off more rapidly as the frequency moves away from resonance. Thus, a radio receiver with a high Q would be more difficult to tune with the necessary precision, but would do a better job of filtering out signals from other stations that lay nearby on the spectrum.
Mathematically, the Q factor is defined as the number of oscillations required for a freely oscillating system's energy to fall off to 1/535 of its original energy, where 535 = e2Ï. When the system is driven, the relationship to the width of the resonance is given by
where the resonant frequency is f0, and Îf stands for the bandwidth. On a graph of response (energy of steady-state vibrations) versus frequency, the bandwidth is defined as the "full width at half maximum" or FWHM. This is the width in frequency where the energy falls to half of its peak value.
SET-RESET FLIP-FLOP(SR FLIPFLOP)
The SR (set-reset) flip-flop has two inputs: S (set) and R (reset). If R is active, the output goes to zero. If S is active, the output goes to one. If neither is activated, the previous state is maintained. Both inputs should not be activated simultaneously; however, if they are, the typical response is for both the inverted and non inverted outputs to have the same level. The behavior of the flip-flop can be described by the characteristic equation: Q+ = S + R'Q.
It is given by truth table-
S R Qout Q
0 0 0 0
0 0 1 1
0 1 X 0
1 0 X 1
1 1 X IMPLEMENT DEPENDENT
2006-06-20 12:39:58
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answer #2
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answered by maya 3
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Q-factor means selectivity.
the higher the q-factor the more selective the coil or the capacitor is in selecting a particular range of frequencies.
at resonance,
Q=reactance of the coil or the capacitor/the resistance of the circuit.
r-s f/f is a bistable f/f.
it is called a set reset f/f.
it has 2 inputs s and r.
it has two outputs q and q'.
it is used to store a digital bit.
it can be constructed with nand or nor gates.
if a 1 is given to s and a 0 is given to r then q=1 and q'=o.
if s=0 , r=1 then q=0,q'=1,if s=r=0,then t5here is no change in the circuit conditions.
if s=r=1 then it is an invalid condition.
2006-06-20 12:41:27
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answer #3
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answered by anirban 1
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Don't forget to metion that a rs flip-flop also has two outputs Q and Q not.
2006-06-21 16:13:20
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answer #4
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answered by Anonymous
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