Phase shifting apparatus and method with frequency

专利名称：Phase shifting apparatus and method with

frequency multiplication

发明人：James Carl Cooper,Steven J. Anderson申请号：US08/609559申请日：19960523公开号：US05675277A公开日：19971007

摘要：The present invention provides a phase shifting apparatus and method. Thephase shifting apparatus comprises a signal generator and a converting device. An inputsignal is converted by the offset signals from the signal generator, thereby producing anoutput signal with the same frequency as that of the input signal. The phase of theoutput signal is determined by the difference of the offset signals applied to theconverting device. In particular, when two offset signals are in quadrature, the outputsignal becomes in quadrature with the input signal. When the two offset signals have thesame phase, the output signal has the same phase as that of the input signal. Preferably,the converting device includes two cascaded offset means, each having a multiplier and afilter coupling to the multiplier. A plurality of converting means may be coupled inparallel to the signal generator. On the basis of the offset signals applied to respectiveconverting means, the phase shifting apparatus provides a plurality of outputs havingdifferent phase shifts. The frequency range of the input signal is very width and the phaseshifting apparatus may operate in analog and digital forms.

申请人：PIXEL INSTRUMENTS

代理机构：Lightbody & Lucas

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