電感耦合回授型直接注入鎖定式除頻器
  ‧ 專利名稱 電感耦合回授型直接注入鎖定式除頻電路
  ‧ 專利證書號 I348281
US 7,671,640 B2
  ‧ 專利權人 國立臺灣大學
  ‧ 專利國家
    (申請日)
中華民國 (2007/10/18)
美國 (2008/06/23)
  ‧ 發明人 李偉暘 , 江簡富 ,
 
技術摘要:
一種電感耦合回授型直接注入鎖定式除頻電路,其可應用於整合至一24GHz(gigahertz)電路系統,用來對超寬頻電子信號提供一除頻功能。此除頻電路的構造至少包含:一注入鎖定式除頻器電路(Injection-Locked Oscillator,ILO)和一對緩衝電路;且該注入鎖定式除頻器電路進而包括:一信號注入開關、一交叉耦接式雙電晶體電路、和一可變電容式調諧電路;且其特點在於該信號注入開關係採用直接注入式之電路架構,且該對緩衝電路中的電感性電路係和該可變電容式調諧電路中的電感性電路形成一電感耦合回授型之電路架構。此特點可提供更高之操作頻率及鎖定範圍、更低之耗電量、以及小型之積體電路佈局面積。
A direct injection-locked frequency divider circuit with inductive-coupling feedback architecture is proposed, which is designed for integration to a high-frequency circuit system with a high operating frequency such as 24 GHz (gigahertz), for providing a frequency-dividing function. The proposed frequency divider circuit comprises an injection-locked oscillator (ILO) circuit module and a pair of buffer-stage circuits, wherein the ILO circuit module further includes a signal-injection circuit, a cross-coupled switching circuit, and a variable-capacitance tuning circuit. The proposed circuit architecture is characterized by the circuit arrangement of a direct-injection architecture and an inductive-coupling feedback architecture by coupling the inductive elements of the buffer-stage circuits to the inductive elements of the variable-capacitance tuning circuit in the ILO circuit module. These features allow the proposed frequency divider circuit to have higher operating frequency with wider frequency locking range, low power consumption, and small integrated circuit layout area.




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