Newnes Dictionary of Electronics

L

ladder network A four-terminal network consisting of alternate series and shunt elements as shown in Figure L.1. As shown in the diagram, if each shunt element is replaced by two elements in parallel and if each series element is replaced by two elements in series, the ladder network can be regarded as a succession of L-networks (Figure L.2). Networks 1 and 2, 3 and 4, etc can be combined to form pi-networks. Alternatively networks 2 and 3, 4 and 5, etc could be combined to form T-networks. Thus a ladder network can be regarded as a succession of T-networks or pi-networks. These constituent networks are known as sections and the L-networks of which they are composed, as half-sections. See constant-k filter, filter, m-derivation.

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