Apparatus and method of differential IQ frequency

专利名称：Apparatus and method of differential IQ
frequency up-conversion
发明人：David F. Sorrells,Michael J. Bultman,Robert
W. Cook,Richard C. Looke,Charley D. Moses,
Jr.,Gregory S. Rawlins,Michael W. Rawlins
申请号：US13231244
申请日：20110913
公开号：US08594228B2
公开日：
20131126
专利内容由知识产权出版社提供
专利附图：
摘要：A balanced transmitter up-converts I and Q baseband signals directly from
baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the I and Q baseband signals in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains necessary information to reconstruct the I and Q baseband signals. The differential sampling is performed according to control signals that are phase shifted with respect to each other. The control signals may have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal.
申请人：David F. Sorrells,Michael J. Bultman,Robert W. Cook,Richard C. Looke,Charley D. Moses, Jr.,Gregory S. Rawlins,Michael W. Rawlins
地址：Middleburg FL US,Jacksonville FL US,Switzerland FL US,Jacksonville FL
US,DeBary FL US,Heathrow FL US,Lake Mary FL US
国籍：US,US,US,US,US,US,US
代理机构：Workman Nydegger
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