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The L-section is identical topology to the potential divider topology. The T-section is identical topology to the Y topology. The Π-section is identical topology to the Δ topology. All these topologies can be viewed as a short section of a ladder topology. Longer sections would normally be described as ladder topology. These kinds of circuits ...
Balanced bridged-T topology; Open-circuit L-section topology; Short-circuit L-section topology; Balanced open-circuit C-section topology; Balanced short-circuit C-section topology; The bridged-T topology is also used in sections intended to produce a signal delay but in this case no resistive components are used in the design.
Schematic circuit of a Π-pad attenuator. The Π pad (pi pad) is a specific type of attenuator circuit in electronics whereby the topology of the circuit is formed in the shape of the Greek capital letter pi (Π). Attenuators are used in electronics to reduce the level of a signal.
The simple conversion procedure shown in the previous section can only be applied in a limited set of conditions – generally, some form of bridged-T circuit is necessary. Many of the conversions require the inclusion of a 1:1 ideal transformer, [ 14 ] but there are some configurations which avoid this requirement, and one example is shown below.
Several L half-sections may be cascaded to form a composite filter. Like impedance must always face like in these combinations. There are therefore two circuits that can be formed with two identical L half-sections. Where Z iT faces Z iT, the section is called a Π section. Where Z iΠ faces Z iΠ the section formed is a T section. Further ...
An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together.
Lattice equivalent of a T-section high-pass filter Lattice equivalent of a Zobel bridge-T low-pass filter. It is possible to use the Bartlett transformation in reverse; that is, to transform a symmetrical lattice network into some other symmetrical topology. The examples shown above could just as equally have been shown in reverse.
Lattice filter topology. A lattice phase equaliser or lattice filter is an example of an all-pass filter.That is, the attenuation of the filter is constant at all frequencies but the relative phase between input and output varies with frequency.