发明名称 |
Local oscillator with non-harmonic ratio between oscillator and RF frequencies using digital mixing and weighting functions |
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. The signal is input to a synthesizer timed to a rational multiplier of the RF frequency f<SUB>RF</SUB>. The signal is then divided to generate a plurality of phases of the divided signal. A plurality of combination signals are generated which are then multiplied by a set of weights and summed to cancel out some undersired products. The result is filtered to generate the LO output signal.
|
申请公布号 |
US2008055009(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
US20070844439 |
申请日期 |
2007.08.24 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
LERNER GREGORY;TAL NIR |
分类号 |
H03B21/01;H03B21/00 |
主分类号 |
H03B21/01 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|