发明名称 |
Local oscillator with non-harmonic ratio between oscillator and RF frequencies using wideband modulation spectral replicas |
摘要 |
A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. An input baseband signal is interpolated and upconverted in the digital domain to an IF. The LO operates at a frequency which is a n/m division of the target RF frequency f<SUB>RF</SUB>. The IF frequency is configured to ½ of the LO frequency. The upconverted IF signal is then converted to the analog domain via digital power amplifiers followed by voltage combiners. The output of the combiners is band pass filtered to extract the desired replica.
|
申请公布号 |
US2008055014(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
US20070844460 |
申请日期 |
2007.08.24 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
TSFATY YOSSI |
分类号 |
H03C3/09 |
主分类号 |
H03C3/09 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|