Modern Usage
The modern design techniques were based on the publication of 'Direct Conversion - A Neglected Technique QST, Nov, 1968'. It appeared as an article in 1968 November's QST publication written by Wes Hayward and Dick Bingham.
The development of the integrated circuit and incorporation of complete phase-locked loop devices in low-cost IC packages made this design widely accepted. Usage is no longer limited to the reception of AM radio signals, but also find use in processing more complex modulation methods. Direct-conversion receivers are now incorporated into many receiver applications, including cellphones, televisions, avionics, medical imaging apparatus and Software-defined radio systems.
Read more about this topic: Synchrodyne, History and Applications
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