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erece
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In many books i saw that open loop transfer function is given by KG(s)H(s) , where G(s) is forward path gain and H(s) is the feedback gain. But according to the definition of open loop it does not contain feedback , then why there is a term of H(s) ?
reference url
http://en.wikibooks.org/wiki/Control_Systems/Stability
reference url
http://en.wikibooks.org/wiki/Control_Systems/Stability