Talk:Network synthesis filters

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Driving point impedance section[edit]

I found the first paragraph of this section hard to understand.

After defining "driving point impedance", the paragraph contains such mysterious clauses as "Treating it as a one-port network, the expression is expanded..." Treating what as a one-port network? A given filter? If so, did it start out life as a two-port network, which port was selected, and how was the other one terminated? What expression is expanded, and for what purpose?

Or are we starting with a desired transfer function, and the goal is to produce a filter circuit diagram by an algorithm that this paragraph briefly sketches? If so, this framing information should be stated at the start of the paragraph.

Then: "The resulting expansion is transformed into a network (usually a ladder network)...". Is this the network depicted in the diagram? Coming from a continued fraction expansion, wouldn't it always be a ladder network? 84.227.254.143 (talk) 16:26, 30 March 2014 (UTC)[reply]