訊號調變裝置與訊號放大器
  ‧ 專利名稱 訊號調變裝置與訊號放大器
  ‧ 專利證書號 I357746
US 7,932,791 B2
  ‧ 專利權人 國立臺灣大學
  ‧ 專利國家
    (申請日)
中華民國 (2008/04/25)
美國 (2008/12/30)
  ‧ 發明人 劉奇恩 , 江簡富 ,
 
技術摘要:
一種訊號調變裝置與訊號放大器。其中,訊號調變裝置含有本地振盪訊號源、基頻訊號源、第一NMOS電晶體與第二NMOS電晶體,又第一NMOS電晶體、第二NMOS電晶體與基頻訊號係形成一以差動形式的基頻訊號直接切換吉爾伯特(Gilbert-cell based)的差動對的電路架構,再透過基頻訊號控制本地振盪訊號源的高頻信號,以於輸出端形成高頻信號的振幅調變訊號,最後藉由本發明的單級訊號功率放大器將來自前級電路的振幅調變訊號放大,以提高傳輸訊號之強度,並改善傳統振幅調變電路中的前級數位/類比訊號轉換電路設計複雜的缺點。

A signal modulation device and a signal amplifier cooperative therewith. The signal modulation device includes a local oscillation signal source, a baseband signal source, a first NMOS transistor, and a second NMOS transistor, wherein the first and second NMOS transistors are coupled with the baseband signal source and form a circuit architecture of a Gilbert-cell based differential pair to be directly switched by a differential baseband signal, and a high-frequency signal from the local oscillation signal source is controlled by the baseband signal so as to generate an amplitude-modulation high-frequency signal at an output end. The single-stage signal power amplifier amplifies the amplitude-modulation signal from the preceding circuit so as to increase the magnitude of signals transmitted and simplify the preceding digital/analog signal conversion circuit in a conventional amplitude-modulation circuit.




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