Simplify pole/zero expressions

*To*: mathgroup at smc.vnet.net*Subject*: [mg4170] Simplify pole/zero expressions*From*: Helge Stenstrom <helge.stenstrom at era-t.ericsson.se>*Date*: Tue, 11 Jun 1996 00:51:54 -0400*Organization*: Ericsson*Sender*: owner-wri-mathgroup at wolfram.com

Please, can anyone tell me how to simplify electrical transfer functions. I want to have the result in the form of factors of the form s 1 + -- z1 s ------ or ----- or a s p0 1 + -- p1 because this clearly shows the positions of poles or zeroes, and what the flat gain is. Oh, I forgot that we need second order factors as well, They should also be in a form of factors that goes towards 1 when s approaches zero or infinity (for inverted poles/zeroes). Is there a package that does this, or is it already built in? Would it be easy to write code that simplifies expressions in this way? Thanx, -- Helge Stenstrom Ericsson Components AB e-mail: helge at eka.ericsson.se Microelectronics division memo: ERI.EKA.EKAHEST S-164 81 KISTA-STOCKHOLM Phone: +46-8- 757 4394 Sweden Fax: just ask ==== [MESSAGE SEPARATOR] ====