降頻式混頻電路Down-conversion frequency mixer circuit

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/060,021

專利證號

US 8,803,586 B1

專利獲證名稱

降頻式混頻電路Down-conversion frequency mixer circuit

專利所屬機關 (申請機關)

國立暨南國際大學

獲證日期

2014/08/12

技術說明

一種降頻式混頻電路，包含一包括一單端轉差動單元及一增益放大單元的射頻電壓轉電流器，及一混頻器。該單端轉差動單元用以接收一單端射頻電壓，並據以轉換成一差動射頻電壓。該增益放大單元用以接收該差動射頻電壓，並據以進行電壓至電流轉換以得到一差動射頻電流。該混頻器用以接收一差動振盪電壓及該差動射頻電流，並將該差動振盪電壓與該差動射頻電流進行混頻以產生一差動中頻電壓，且該差動中頻電壓的一頻率相關於該差動射頻電流及該差動振盪電壓的頻率，且該差動中頻電壓相對於該單端射頻電壓的比值實質上為一轉換增益。 A frequency mixer circuit includes a mixer, a load stage, and again stage. The load stage cooperates with the mixer to generate a differential output voltage signal with a mixed frequency according to a differential local oscillator voltage signal and a differential input voltage signal. The gain stage has a transconductance, and a magnitude of the differential current signal and the transconductance have a positive relationship therebetween, so as to result in a positive relationship between the transconductance and a conversion gain which is a ratio of magnitude of the differential output voltage signal to magnitude of the differential input voltage signal.

備註

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