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Industry News / Passive Components / Semiconductors / Integrated Circuits

Specifications and Definitions for Quadrature Demodulators and Receiver Design Measurements

This article discusses the common and questionable definitions of the specifications for quadrature demodulators, including gain, intercept point and noise figure. Emphasis is on the mapping between single-tone measurement data and the modulated signal...

October 1, 2002
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The quadrature demodulator is used in either heterodyne or homodyne receivers. In commercial communication receivers, the local oscillator frequency ranges from a few kilohertz to a few gigahertz. It is usual to test the individual part with a single tone to avoid the complexity of the baseband waveform. The...
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