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发明公开
CN104584443A 具有超外差式和零中频（ZIF）拓扑结构的收发机 失效 - 权利终止

具有超外差式和零中频（ZIF）拓扑结构的收发机
摘要：
公开了用超外差式和零中频(ZIF)拓扑结构的组合来实现的收发机。在一示例性设计中，一种装置包括变频电路和本地振荡器(LO)发生器。LO发生器生成第一LO信号和第二LO信号。变频电路(i)基于第一LO信号为IF信号执行中频(IF)与基带之间的变频以及(ii)基于第二LO信号为RF信号执行射频(RF)与基带之间的变频。变频电路可以(i)为超外差式接收机执行从IF至基带的下变频以及(ii)为ZIF接收机执行从RF至基带的下变频。替代地或附加地，变频电路可以(i)为超外差式发射机执行从基带至IF的上变频以及(ii)为ZIF发射机执行从基带至RF的上变频。
摘要（英）：

Transceivers implemented with a combination of super-heterodyne and zero intermediate frequency (ZIF) topologies are disclosed. In an exemplary design, an apparatus includes a frequency conversion circuit and a local oscillator (LO) generator. The LO generator generates a first LO signal and a second LO signal. The frequency conversion circuit performs frequency conversion (i) between intermediate frequency (IF) and baseband, based on the first LO signal, for an IF signal and (ii) between radio frequency (RF) and baseband, based on the second LO signal, for an RF signal. The frequency conversion circuit may perform frequency downconversion (i) from IF to baseband for a super-heterodyne receiver and (ii) from RF to baseband for a ZIF receiver. Alternatively or additionally, the frequency conversion circuit may perform frequency upconversion (i) from baseband to IF for a super-heterodyne transmitter and (ii) from baseband to RF for a ZIF transmitter.

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