发明申请
- 专利标题: Frequency generator and communication system
- 专利标题(中): 频率发生器和通讯系统
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申请号: US10893438申请日: 2004-07-19
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公开(公告)号: US20050077930A1公开(公告)日: 2005-04-14
- 发明人: Toru Masuda
- 申请人: Toru Masuda
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 优先权: JP2003-349010 20031008
- 主分类号: H03B19/14
- IPC分类号: H03B19/14 ; H03B19/00 ; H03B27/00 ; H03D7/14 ; H03H11/26
摘要:
The object of the invention is to provide a frequency generator which is composed of an oscillator and a frequency doubler and in which difference in amplitude between differential outputs of the frequency doubler can be equalized at low power consumption without adjustment. To achieve the object, the amplitude of differential outputs of the frequency doubler is detected and the delay time of a variable delay circuit is controlled. Owing to this configuration, in case a frequency of the oscillator varies or in case delay time by the delay circuit used in the frequency doubler varies by process variation and others even if the frequency is fixed, the amplitude of the differential outputs of the frequency doubler can be also equalized in the frequency generator.
公开/授权文献
- US07091757B2 Frequency generator and communication system 公开/授权日:2006-08-15
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