发明申请
- 专利标题： Frequency Modulation Based on Two Path Modulation
- 专利标题（中）： 基于两路调制的调频
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申请号： US14203572申请日： 2014-03-11
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公开(公告)号： US20150263670A1公开(公告)日： 2015-09-17
- 发明人: Yiping Fan , Chun-Yuan Lin , Sheng-Wei Chiang , Yi-Chun Lu
- 申请人： Uniband Electronic Corp.
- 申请人地址： TW Hsin-Chu
- 专利权人： Uniband Electronic Corp.
- 当前专利权人： Uniband Electronic Corp.
- 当前专利权人地址： TW Hsin-Chu
- 主分类号： H03B5/12
- IPC分类号： H03B5/12
摘要：
A two path direct frequency modulation system is disclosed. The system includes a Varactor, a voltage-controlled oscillator (VCO) calibration capacitor bank including a first plurality of switchable capacitors, and a frequency deviation capacitor bank including a second plurality of switchable capacitors. The method includes switching on or off a number of the first plurality of switchable capacitors to obtain a desired frequency band and determining number of cycles within a first predetermined time to obtain a first count, switching on or off a number of the first plurality of switchable capacitors or of the second plurality of switchable capacitors to change the desired frequency band and determining number of cycles within a second predetermined time to obtain a second count, and modulating a data signal by switching on or off a switchable capacitors of the second plurality of switchable capacitors according to the first and the second count.