the RF front end components are colored red. See also H2X radar Automatic gain control Demodulator Direct conversion receiver VFO Single sideband modulation (demodulation) Tuned radio frequency receiver Reflex receiver Optical heterodyne detection Superheterodyne transmitter Notes References Further reading External links http://ethw.org/Superheterodyne_Receiver . An article giving the history of the various inventors working on the superheterodyne method. Raises Paul Laüt published six months before Lévy; Étienne published the memo. Describes English efforts. 29F(2d)953. Armstrong v. Lévy, decided Dec. 3, 1928 http://www.leagle.com/decision/192898229F2d953_1614/ARMSTRONG%20v.%20LEVY An in-depth introduction to superheterodyne receivers Superheterodyne receivers from microwaves101.com Multipage tutorial describing the superheterodyne receiver and its technology Radio electronics Communication circuits Electronic design History of radio Receiver (radio)