發送短信

數:

提供者:

CAPTCHA:

  ______    _____    __   __   __   __    _____   
 /_   _//  |  ___||  \ \\/ //  \ \\/ //  |__  //  
 `-| |,-   | ||__     \   //    \ ` //     / //   
   | ||    | ||__     / . \\     | ||     / //__  
   |_||    |_____||  /_//\_\\    |_||    /_____|| 
   `-`'    `-----`   `-`  --`    `-`'    `-----`

Please enter what you see:

發送短信 : A CMOS VGA with DC offset cancellation for direct-conversion receivers