標題: Phase frequency detector with a narrow control pulse
作者: Lee
Chen-Yi
Chen
Pao-Lung
公開日期: 14-十二月-2004
摘要: A phase frequency detector with a narrow control pulse comprises mainly two substantially equivalent phase latches with a narrow control pulse, and a reset signal generating unit. Each phase latch of a narrow control pulse has a clock pulse input end and a signal output end. Both latches also are connected to the reset signal generating unit. The logic value of each signal output end is decided by which clock pulse input appears first. The reset signal generating unit decides whether or not to generate a reset signal according to the logic values of both signal output ends. The reset signal is then sent to both phase latches of a narrow control pulse, if generated. The present invention can be implemented by a simple circuit. Comparing with the RS NAND PFD or master-slave D PFD, the PFD of the invention has the advantages of faster speed, saving more power and smaller IC chip area. Comparing with dynamic PFD, because the PFD of the invention has a feedback circuit, the storage charges of internal nodes will not be lost due to the leakage current and therefore the working frequency range is wider.
官方說明文件#: G01R025/00
H03D013/00
G01R029/00
H03D003/00
H03D009/00
G01R023/02
H03K009/06
URI: http://hdl.handle.net/11536/104838
專利國: USA
專利號碼: 06831485
顯示於類別:專利資料


文件中的檔案:

  1. 06831485.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。