For contact information about worldwide offices, see the Math Works Web site. Writing S-Functions COPYRIGHT 1998-2002 by The Math Works, Inc. The software described in this document is fur d under a license agreement. The software may be used or copied only under the terms of the license agreement. No part of this manual may be photocopied or repro-

COPYRIGHT 1998-2002 by The Math Works, Inc. The software described in this document is fur d under a license agreement. The software may be used or copied only under the terms of the license agreement. No part of this manual may be photocopied or repro- duced in any form The Math Works, Inc. FEDERAL ACQUISITI

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How to contact the mathWorks: www.mathworks.com Web comp. soft-sys matlab Newsgroup supportamathworks com Technical support suggestemathworks.com Product enhancement suggestion

How to contact the mathWorks: www.mathworks.com Web comp. soft-sys matlab Newsgroup supportamathworks com Technical support suggestemathworks.com Product enhancement suggestion

How to Contact the mathWorks www.mathworks.com Web comp.soft-sys matlab Newsgroup support@mathworks.com Technical support suggest@mathworks.comProductenhancementsuggestions

How to Contact The MathWorks 508-647-7000 Phone 508-647-7001 ax C The MathWorks, Inc Maill 3 Apple Hill Drive Natick. MA 01760-2098 http://www.mathworks.comWeb Anonymous FTP server comp. soft-sys. matl ab

How to Contact The MathWorks 508-647-7000 Phone 508-647-7001 ax C The MathWorks, Inc Maill 3 Apple Hill Drive Natick. MA 01760-2098 http://www.mathworks.comWeb Anonymous FTP server

How to contact the mathWorks: www.mathworks.com Web comp. soft-sys matlab Newsgroup supportamathworks com Technical support suggestemathworks.com Product enhancement suggestion

(1)三种反馈控制系统分类 自动增益控制(AGC)电路:在输入信号幅度变化很大的情况下,使输出信号幅度保持恒定或仅在较小范围内变化的一种自动控制电路。 自动频率控制(AFC)电路:是一种频率反馈控制系统,AFC电路控制的是信号的频率