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What is Q factor of a parallel resonant circuit?
The selectivity or Q-factor for a parallel resonance circuit is generally defined as the ratio of the circulating branch currents to the supply current and is given as: Note that the Q-factor of a parallel resonance circuit is the inverse of the expression for the Q-factor of the series circuit.
What is the power factor at resonance in RLC parallel circuit?
unity
A parallel resonant circuit is used as current amplifier. A resonant circuit is also used as a filter. Resonance is a condition in an RLC circuit in which the capacitive and inductive reactances are equal in magnitude, thereby resulting in a purely resistive impedance. power factor is unity (purely resistive).
What is the Q factor in a parallel LC circuit?
• In a parallel LC circuit where the main loss is the resistance of the inductor, R, in series with the inductance, L, Q is as in the series circuit. This is a common circumstance for resonators, where limiting the resistance of the inductor to improve Q and narrow the bandwidth is the desired result.
How to calculate quality factor of RLC circuit?
Quality factor can also be a characteristics of a resonator bandwidth 1 Q 0. RLC parallel resonant circuit. Here 1 Z i n = ( 1 R + 1 j w L – j w C). As for the case above we calculate input power for resonator P i n = V I 2 = 1 2 V 2 ( 1 R + 1 j w L – j w C).
What is the Q factor of a TRF circuit?
Series Resonant Circuits • In an ideal series RLC circuit, and in a tuned radio frequency receiver (TRF) the Q factor is: • Q = 1 𝑅 𝐿 𝐶 = 𝜔0 𝐿 𝑅 • where R, L and C are the resistance, inductance and capacitance of the tuned circuit, respectively.
Why is the Q factor low in a resonant circuit?
Voltage is at a peak at resonance since voltage is proportional to impedance (E=IZ). Parallel resonant circuit: Impedance peaks at resonance. A low Q due to a high resistance in series with the inductor produces a low peak on a broad response curve for a parallel resonant circuit.