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Double conversion receiver

A receiver and double conversion technology, applied in the field of frequency receivers, can solve the problem that it is difficult to maintain the signal amplitude uniformly

Inactive Publication Date: 2007-10-17
INTEGRANT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, it is often difficult to uniformly maintain the amplitude of the received signal containing the information portion

Method used

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Embodiment Construction

[0034] Various embodiments of the invention are described in more detail with reference to the accompanying drawings.

[0035] Figure 1a shows a double conversion receiver 200 according to a first embodiment of the invention. Fig. 1b shows another exemplary double conversion receiver modified from the double conversion receiver 200 according to the first embodiment of the present invention.

[0036] As shown in FIG. 1 a , a double conversion receiver 200 includes a direct downconverter 210 and an intermediate upconverter 220 . The direct downconverter 210 downconverts the RF signal RF in the RF band to the zero IF signal IF in the zero IF band ZERO and output zero IF signal IF ZERO . The intermediate up-converter 220 converts the down-converted zero-IF signal IF ZERO Up-conversion to a low IF signal IF in the low IF band LOW and output low IF signal IF LOW .

[0037] The double conversion receiver 200 according to the first embodiment of the present invention is describ...

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Abstract

Provided is a double conversion receiver. The double conversion receiver comprises a direct down-converter down converting a radio frequency (RF) signal at a RF band into a zero-intermediate frequency (IF) signal at a zero-IF band, and an intermediate up-converter up converting the down-converted zero-IF signal into a low-IF signal at a low-IF band.

Description

[0001] This non-provisional application claims priority under 35 U.S.C §119(a) to Patent Application No. 10-2006-0032319 filed in Korea on April 10, 2006, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a double conversion receiver and more particularly to a receiver which converts the received frequency twice. Background technique [0003] Conventional receivers use a superheterodyne mode that converts a radio frequency (RF) band signal received by the receiver into an intermediate frequency (IF) band signal, which in turn is converted into a baseband signal. [0004] Intermodulation distortion and parasitic elements are generated within the receiver due to non-linear characteristics due to the repetitive frequency conversion performed in the receiver using the superheterodyne mode. Furthermore, the receiver uses a surface acoustic wave (SAW) filter disposed outside the receiver to remove intermodu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16H04B1/40H03D7/00
CPCH04B1/28H03G3/341H03G3/3068H04B1/0032H04B1/06
Inventor 金本冀赵永镐金宝垠
Owner INTEGRANT TECH