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RLC circuit as a high-pass filter: Figure 8. RLC circuit as a series band-pass filter in series with the line: Figure 9. RLC circuit as a parallel band-pass filter in shunt across the line: Figure 10. RLC circuit as a series band-stop filter in shunt across the line: Figure 11. RLC circuit as a parallel band-stop filter in series with the line
4 Parallel RLC Circuit Schematic. 10 comments. 5 Bizarre circuit image. 2 comments. ... 9 Where does the term "fractional bandwidth" and symbol '"`UNIQ--postMath ...
In electronics and signal processing, a filter is usually a two-port circuit or device which removes frequency components of a signal (an alternating voltage or current). A band-pass filter allows through components in a specified band of frequencies, called its passband but blocks components with frequencies above or below this band.
A resistor–inductor circuit (RL circuit), or RL filter or RL network, is an electric circuit composed of resistors and inductors driven by a voltage or current source. [1] A first-order RL circuit is composed of one resistor and one inductor, either in series driven by a voltage source or in parallel driven by a current source.
The accuracy depends on both filter structure and resonator structure. The accuracy improves when the fractional bandwidth narrows. Inaccuracy of formulas (16) and their refined version is caused by the frequency dispersion of the coupling coefficients that may varies in a great degree for different structures of resonators and filters. [9]
[6] Selectivity requires narrow bandwidth, but the bandwidth of a filter with a given Q factor increases with frequency. So to achieve a narrow bandwidth at a high radio frequency required high-Q filters or many filter sections. Achieving constant sensitivity and bandwidth across an entire broadcast band was rarely achieved.
LC circuits are often used as filters; the Q ("Quality" factor) determines the bandwidth of each LC tuned circuit in the radio. The L/C ratio, in turn, determines their Q and so their selectivity, because the rest of the circuit - the aerial or amplifier feeding the tuned circuit for example - will contain present resistance.
The group delay and phase delay properties of a linear time-invariant (LTI) system are functions of frequency, giving the time from when a frequency component of a time varying physical quantity—for example a voltage signal—appears at the LTI system input, to the time when a copy of that same frequency component—perhaps of a different physical phenomenon—appears at the LTI system output.