RLC circuit
Δημοσιεύτηκε στις 19 Αυγ 2014
An
RLC circuit (the letters R, L and C can be in other orders) is an
electrical circuit consisting of a resistor, an inductor, and a
capacitor, connected in series or in parallel. The RLC part of the name
is due to those letters being the usual electrical symbols for
resistance, inductance and capacitance respectively. The circuit forms a
harmonic oscillator for current and will resonate in a similar way as
an LC circuit will. The main difference that the presence of the
resistor makes is that any oscillation induced in the circuit will die
away over time if it is not kept going by a source. This effect of the
resistor is called damping. The presence of the resistance also reduces
the peak resonant frequency somewhat. Some resistance is unavoidable in
real circuits, even if a resistor is not specifically included as a
component. An ideal, pure LC circuit is an abstraction for the purpose
of theory.
There are many applications for this circuit. They are
used in many different types of oscillator circuits. Another important
application is for tuning, such as in radio receivers or television
sets, where they are used to select a narrow range of frequencies from
the ambient radio waves. In this role the circuit is often referred to
as a tuned circuit. An RLC circuit can be used as a band-pass filter,
band-stop filter, low-pass filter or high-pass filter. The tuning
application, for instance, is an example of band-pass filtering. The RLC
filter is described as a second-order circuit, meaning that any voltage
or current in the circuit can be described by a second-order
differential equation in circuit analysis.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
RLC circuit (the letters R, L and C can be in other orders) is an
electrical circuit consisting of a resistor, an inductor, and a
capacitor, connected in series or in parallel. The RLC part of the name
is due to those letters being the usual electrical symbols for
resistance, inductance and capacitance respectively. The circuit forms a
harmonic oscillator for current and will resonate in a similar way as
an LC circuit will. The main difference that the presence of the
resistor makes is that any oscillation induced in the circuit will die
away over time if it is not kept going by a source. This effect of the
resistor is called damping. The presence of the resistance also reduces
the peak resonant frequency somewhat. Some resistance is unavoidable in
real circuits, even if a resistor is not specifically included as a
component. An ideal, pure LC circuit is an abstraction for the purpose
of theory.
There are many applications for this circuit. They are
used in many different types of oscillator circuits. Another important
application is for tuning, such as in radio receivers or television
sets, where they are used to select a narrow range of frequencies from
the ambient radio waves. In this role the circuit is often referred to
as a tuned circuit. An RLC circuit can be used as a band-pass filter,
band-stop filter, low-pass filter or high-pass filter. The tuning
application, for instance, is an example of band-pass filtering. The RLC
filter is described as a second-order circuit, meaning that any voltage
or current in the circuit can be described by a second-order
differential equation in circuit analysis.
This video is targeted to blind users.
Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video
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