Synthétiseur de fréquence à linéarisation de la réponse de la modulation

Frequency synthesizer modulation response linearization

Frequenzsynthetisierer mit Linearisierung des Modulationsganges

Abstract

In accordance with the present invention, there is provided a method of substantially flattening the modulation response in a frequency synthesizer. The method includes the steps of generating a synthesized frequency F o in response to a filtered control signal V s ; scaling the synthe­ sized frequency F o with a scalar N; generating a control signal I o , having a response substantially the reciprocal of the frequency generation response, and indicative of the phase relationship between a reference frequency F r and the scaled, synthesized frequency F n ; and filtering the control signal, whereby the interaction of the phase relationship control signal response and the frequency generation re­ sponse approximates a flat modulation response.

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Patent Citations (3)

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    DE-2706224-A1August 17, 1978Rohde & SchwarzDigital einstellbarer frequenzgenerator
    EP-0153868-A2September 04, 1985Hewlett-Packard CompanyFM calibration in a phase-locked loop
    US-4392113-AJuly 05, 1983Jackson Charles RPhase-locked loop including non-linear phase detector of the sample and hold type

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