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HIGH ACCURACY MILLIMETER WAVE/RADIO FREQUENCY WIDEBAND IN PHASE AND QUADRATURE GENERATION
HIGH ACCURACY MILLIMETER WAVE/RADIO FREQUENCY WIDEBAND IN PHASE AND QUADRATURE GENERATION
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机译:相和正交产生中的高精度毫米波/无线电频率宽带
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摘要
Certain aspects of the present disclosure provide circuits for generating high accuracy millimeter wave or radio frequency (RF) wideband in phase (I) and quadrature (Q) oscillating signals having acceptable amplitude and phase mismatch over process voltage and temperature (PVT) variations with reduced cost area and power consumption. In one example apparatus a polyphase filter having a first stage (602) and a second stage (604) is provided. Each stage comprises resistive elements (503) and capacitive elements (505). Certain aspects of the present disclosure provide for intentional resistive and/or capacitive value mismatch between the resistive or capacitive values of one or multiple stages such that the phase mismatch between the resulting I and Q signals may be reduced without degrading the amplitude mismatch. Certain aspects of the present disclosure provide for replacing the resistive elements in at least one stage with transistors (508) operating in the triode region where the on resistance is controlled by a feedback network (506). Fig.6
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