| 摘要 |
The present invention relates to a receiver, and more particularly, to a Zero-IF receiving apparatus for digital multimedia broadcasting (DMB). The Zero-IF receiver for DMB according to the present invention comprises a first receiver that comprises a first mixer, a first Low-Pass Filter (LPF) and a first Low-Noise Amplifier (LNA) and forms an I channel, a second receiver that comprises a second mixer, a second LPF and a second LNA and forms a Q channel, a Phase Locked Loop (PLL), a Local Oscillator (LO) and a Phase Local Oscillator (PLO). An input terminal of each of the first mixer of the first receiver and an input terminal of the second mixer of the second receiver are connected to an output terminal of a LNA that amplifies a satellite frequency signal. Furthermore, an input terminal of the first mixer of the first receiver and an input terminal of the second mixer of the second receiver are connected to output terminals of the PLL, the LO and the PLO. |
