Abstract
A semidynamic frequency divide-by-1.5 circuit comprises an image-rejection mixer and a static divide-by-2 in its feedback path. Wideband suppression of unwanted tones is achieved by employing a tunable image-rejection mixer and a tunable single-stage polyphase filter. Implemented in GaInP/GaAs heterojunction bipolar transistor technology, the divide-by-1.5 operates over the input frequency range of 4.5 to 9.2GHz with better than -20-dBc suppressions of 1/3timesf <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</sub> and f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</sub> components, while dissipating 29 mA from a 4.1-V supply
Published Version
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