发明授权
- 专利标题： Frequency synthesizer having compensation for nonlinearities
- 专利标题（中）： 具有非线性补偿的频率合成器
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申请号： US400665申请日： 1989-08-31
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公开(公告)号： US4980652A公开(公告)日： 1990-12-25
- 发明人: Yoshiaki Tarusawa , Shigeki Saito , Yasushi Yamao , Toshio Nojima
- 申请人： Yoshiaki Tarusawa , Shigeki Saito , Yasushi Yamao , Toshio Nojima
- 申请人地址： JPX Tokyo
- 专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX63-218586 19880902; JPX63-254199 19881007; JPX63-291999 19881118
- 主分类号： H03L7/14
- IPC分类号： H03L7/14 ; H03L7/189 ; H03L7/199
摘要：
In a phase locked loop frequency synthesizer, the frequency of a VCO is switched by changing the division ratio of a variable ratio frequency divider in the feedback path of the loop. At the time of switching, a prepositioning voltage is applied to the VCO to realize fast frequency switching. To correct for nonlinear response of the VCO, the prepositioning voltage is adjusted according to information received from a voltage measuring circuit connected to the VCO control circuit.
公开/授权文献
- US5513199A Blue-green laser diode 公开/授权日：1996-04-30
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