Advanced Receiver Architectures in Radio-Frequency Applications
Keywords:
supersonic heterodyne, tuned radio frequency
Abstract
The general principles of several types of receivers fall under the two main headings of TRF tuned radiofrequency receivers where the received signal is processed at the incoming frequency right up to the detector stage and the superhet supersonic heterodyne receiver where the incoming signal is translated sometimes after some amplification at the incoming frequency to an intermediate frequency for further processing There are however a number of variants of each of these two main types Regeneration reaction or tickling may be applied in a TRF receiver to increase both its sensitivity and selectivity This may be carried to the stage where the RF amplifier actually oscillates either continuously so that the receiver operates as a synchrodyne or homodyne or intermittently so that the receiver operates as a super-regenerative receiver both of which have been described previously The synchrodyne or homodyne may be considered alternatively as a superhet where the IF intermediate frequency is 0 Hz In this paper we present the new type of receiver architectures which work in radiofrequencies
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Published
2013-05-15
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