发明名称 |
Method and apparatus for a duty-cycled harmonic injection locked oscillator |
摘要 |
A method and an apparatus for a duty-cycled injection locked oscillator is provided for frequency shift keyed (FSK) signal transmissions. The oscillator includes a resonance LC tank and a first switching device. The first switching device is coupled to the resonance LC tank and injects an initial current pulse with a predetermined pulse magnitude into the resonance LC tank. The initial current pulse also fixes an initial phase of the duty-cycled injection locked free-running oscillator in response to the predetermined magnitude of the initial current pulse to enable fast settling of injection locking and high data rate operation of the duty-cycled injection locked oscillator. The oscillator also includes a second switching device, such as a differential pair of switching devices. The second switching device is coupled to the LC resonance tank for injecting a gated periodic reference signal having a duty cycle modified to reduce power of the reference signal by approximately seventy-five per cent. |
申请公布号 |
US9231596(B2) |
申请公布日期 |
2016.01.05 |
申请号 |
US201114007661 |
申请日期 |
2011.03.28 |
申请人 |
Agency for Science, Technology and Research |
发明人 |
Chen Zhiming;Cheng Kuang-Wei;Zheng Yuanjin;Je Minkyu |
分类号 |
H03B5/12;H03L7/00;H03L7/24 |
主分类号 |
H03B5/12 |
代理机构 |
Crockett & Crockett, PC |
代理人 |
Crockett, Esq. K. David;Syrengelas, Esq. Niky Economy;Crockett & Crockett, PC |
主权项 |
1. A method for fixing the initial phase of a free-running oscillator comprising:
injecting an initial current pulse into the resonant LC tank of the free-running oscillator before oscillation build up in the free-running oscillator, wherein the initial current pulse has a predetermined magnitude, wherein the initial phase of the free-running oscillator is determined by the predetermined magnitude of the initial current pulse; and locking the free-running oscillator in response to a relationship between the predetermined magnitude of the initial current pulse and a phase of the free-running oscillator. |
地址 |
Singapore SG |