Tag: image rejection
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Evolution of Radio Receivers Part 6: Image Rejection, Dual/Multiple Conversion, and the Sony ICF-7600A
Part 6 of the series discusses the why and how of dual/multiple conversion. We will quantify the image problem with simple calculations, examine why a single high IF is rarely ideal, and show how dual conversion solves both requirements at once. As an example, we will examine the Sony ICF-7600A dual-conversion multi-band portable. Finally we…
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Evolution of Radio Receivers – Part 2: The Superheterodyne Architecture Explained
In the early days of radio broadcast, performance of receivers were barely adequate. It was until the invention of the Superheterodyne architecture that made high-performance receivers a reality. This post examines the building blocks of a superheterodyne receiver in details, highlighting its advantages and limitations, and explains why it is still the best architecture nowadays.