LOW NOISE BLOCK (LNB) DOWN CONVERSION CHIP CIRCUIT AND CHIP, LNB DOWN CONVERSION CIRCUIT AND METHOD

Title:

LOW NOISE BLOCK (LNB) DOWN CONVERSION CHIP CIRCUIT AND CHIP, LNB DOWN CONVERSION CIRCUIT AND METHOD

Document Type and Number:

WIPO Patent Application WO/2012/006899

Kind Code:

A1

Abstract:

A Low Noise block (LNB) down conversion chip circuit is disclosed. The solution performs a down conversion on a radio frequency signal utilizing a quadrature local oscillation signal and a quadrature mixer, and then performs a 90 degrees phase shift on a mixed quadrature intermediate frequency signal utilizing a passive multiphase filter. A LNB down conversion chip, LNB down conversion circuit with the LNB down conversion chip circuit and LNB down conversion method are also disclosed. With this application, an image signal is filtered, and image signal suppression is implemented.

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Inventors:

WEI SHUNRAN (CN)
YIN XUNSONG (CN)

Application Number:

PCT/CN2011/073870

Publication Date:

January 19, 2012

Filing Date:

May 10, 2011

Export Citation:

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Assignee:

RDA TECHNOLOGIES LTD (CN)
WEI SHUNRAN (CN)
YIN XUNSONG (CN)

International Classes:

H03D7/18

Foreign References:

CN101331679A	2008-12-24
CN101465630A	2009-06-24
US20060088122A1	2006-04-27

Other References: