T-dmb and dab low intermediate frequency receiver

A technology of digital audio broadcasting and multimedia broadcasting, applied in digital media broadcasting, digital audio broadcasting, broadcasting receiving circuits, etc., can solve the problems of increasing production costs and increasing the total volume of radio communication devices, etc.

Inactive Publication Date: 2007-02-14
INTEGRANT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the overall volume of the radio communication device is increased, and the production cost is also increased

Method used

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  • T-dmb and dab low intermediate frequency receiver
  • T-dmb and dab low intermediate frequency receiver
  • T-dmb and dab low intermediate frequency receiver

Examples

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Embodiment Construction

[0032] Embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0033] figure 2 A simplified block diagram of a T-DMB and DAB low IF receiver according to one embodiment of the invention is shown.

[0034] The receiver includes a low noise amplifier 202 , an image carrier rejection down-converting mixer 203 , a low pass filter 204 , an amplifier 205 , a local oscillator 208 and a phase locked loop 209 . Said receiver is in particular a T-DMB and DAB low IF receiver in which a low noise amplifier 202, an image carrier suppression down-conversion mixer 203, a low pass filter 204, an amplifier 205, a local oscillator 208 and a phase locked loop 209 is integrated within a single chip, ie within the receiver chip 206 .

[0035] The antenna 201 receives the RF signal and transmits the RF signal to the LNA 202 which suppresses the noise signal and amplifies the RF signal. The output signal of the LNA 202 is sent to the i...

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PUM

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Abstract

Provided is a terrestrial-digital multimedia broadcasting (T-DMB) and digital audio broadcasting (DAB) low intermediate frequency (IF) receiver. A T-DMB and DAB low IF receiver comprises a low noise amplifier (LNA) 202, an image rejection down-conversion mixer 203, a low pass filter 204, an amplifier 205, a local oscillator 208, and a phase-locked loop 209. Particularly, the LNA, the image rejection down-conversion mixer, the low pass filter, the amplifier, the local oscillator, and the phase-locked loop are integrated in a monolithic semiconductor integrated circuit substrate. Using the T-DMB and DAB low IF receiver allows a removal of a conventional SAW filter and the T-DMB and DAB low IF receiver can be easily integrated in the monolithic semiconductor integrated circuit substrate, and manufactured at low costs.

Description

[0001] This official application claims priority under 35 U.S.C. §119(a) to Patent Application No. 10-2005-0074552 filed in Korea on Aug. 13, 2005, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a terrestrial-digital multimedia broadcasting (T-DMB) and digital audio broadcasting (DAB) receiver. Background technique [0003] Conventional receivers use a superheterodyne mode, which converts the received signal to a signal in the intermediate frequency (IF) band, which in turn converts the signal to baseband. [0004] Typically, IF is used to improve the performance of receivers using filters that effectively filter out specific frequency bands. A surface acoustic wave (SAW) filter is generally used as the above filter. [0005] Conventional DAB receivers use the L-band of the radio frequency (RF) spectrum ranging from 1,450 MHz to 1,492 MHz. On the other hand, conventional T-DMB receivers use Band ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04B1/26
CPCH04B1/0064H04B1/30H04B1/0082H03J1/005H04H40/18H04H2201/11H04H2201/20H04N5/44
Inventor 金本冀金宝垠
Owner INTEGRANT TECH
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