Patent ID: 8159619
Filing Date: 2012-04-17
Classification: H03J,H04N

Abstract:
1. An multi-standard integrated television receiver, comprising: a RF synthesizer, for generating a first oscillation signal according to a channel and a mode that the television receiver is set; a tracking filter, for receiving a RF signal and filtering out a fifth order and above harmonics to generate a filtered signal, wherein the tracking filter dynamically adjusts its central frequency according to the channel; a band-pass filter, connected to the tracking filter, for filtering out the harmonics; a quadrature generator, connected to the band-pass filter, for generating an in-phase processing signal and a quadrature-phase processing signal, wherein the central frequency of the quadrature generator varies according to the channel; a calibration signal generator, for receiving the first oscillation signal and controlling the central frequency of the tracking filter; a phase shifter, for receiving the first oscillation signal, performing phase shifting operations and generating an in-phase reference signal and a quadrature-phase reference signal; a double quadrature mixer, for receiving the in-phase processing signal, the quadrature-phase processing signal, the in-phase reference signal and the quadrature-phase reference signal, wherein, while the television receiver is set to a digital television reception mode, the double quadrature mixer generates an in-phase baseband signal and a quadrature-phase baseband signal, and while the television receiver is set to an analog television reception mode, the double quadrature mixer generates an in-phase Low-IF signal and a quadrature-phase Low-IF signal; a polyphase filter unit, for filtering out image signals of the in-phase Low-IF signal and the quadrature-phase Low-IF signal while the television receiver is set to the analog television reception mode, and outputting the in-phase baseband signal and the quadrature-phase baseband signal while the television receiver is set to the digital television reception mode; a variable gain amplifier unit for amplifying the output of the polyphase filter unit; and a channel select filter, connected to the variable gain amplifier unit, for setting a low-pass frequency of the channel select filter according to a channel select signal and generating an output signal.