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Baseband signal processing involves the provision of quadrature channels if phase information is of importance. A technique of producing extremely well matched quadrature phase detectors over a 40 dB dynamic range is described, together with a scheme to measure the resulting phase errors to an accuracy of less than 1 min.
Inspec keywords: demodulators; frequency stability
Other keywords:
Subjects: Modulators, demodulators, discriminators and mixers