发明名称 |
TELEVISION TUNER AND METHOD OF PROCESSING A RECEIVED RF SIGNAL |
摘要 |
A television (TV) tuner includes a first mixer for mixing a received RF signal with a first local oscillator signal to produce an intermediate frequency signal, a second mixer for mixing the intermediate frequency signal with a second local oscillator signal for producing an in-phase baseband output signal, a third mixer for mixing the intermediate frequency signal with a third local oscillator signal for producing a quadrature-phase baseband output signal, the third local oscillator signal being the second local oscillator signal phase delayed, and a single phase locked loop (PLL) coupled to the first mixer and the second mixer unit for generating the first local oscillator signal and the second local oscillator signal according to a selected channel in the received RF signal.
|
申请公布号 |
US2005001937(A1) |
申请公布日期 |
2005.01.06 |
申请号 |
US20040708060 |
申请日期 |
2004.02.06 |
申请人 |
LEE LIANG-HUI;TWU DSUN-CHIE;SU TUNG-MING |
发明人 |
LEE LIANG-HUI;TWU DSUN-CHIE;SU TUNG-MING |
分类号 |
H03D7/16;(IPC1-7):H04N5/50 |
主分类号 |
H03D7/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|