Пријемник — разлика између измена

* {{Cite book|ref=harv|title=Principles of Electronic Communication Systems|year=1998|url=https://archive.org/details/principlesofelec0000fren|last=Frenzel|publisher=Glencoe/McGraw-Hill|id=ISBN|first=Louis E. 978-0-02-800409-9|pages=[https://archive.org/details/principlesofelec0000fren/page/6 6]-7}}