Editing Superheterodyne receiver (section)

==Modern designs==
Microprocessor technology allows replacing the superheterodyne receiver design by a [[software-defined radio]] architecture, where the IF processing after the initial IF filter is implemented in software. This technique is already in use in certain designs, such as very low-cost FM radios incorporated into mobile phones, since the system already has the necessary [[microprocessor]].

[[Radio transmitter]]s may also use a mixer stage to produce an output frequency, working more or less as the reverse of a superheterodyne receiver.