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Direct change-over receiver for directly clearing deviation (DC)

A receiver, direct technique, applied in the direction of oscillation conversion angle demodulation, demodulation of angle modulated oscillations, electrical components, etc.

Inactive Publication Date: 2003-06-25
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, this method of averaging digital signals in real time also has problems when the DC offset component suddenly increases due to external disturbances

Method used

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  • Direct change-over receiver for directly clearing deviation (DC)
  • Direct change-over receiver for directly clearing deviation (DC)
  • Direct change-over receiver for directly clearing deviation (DC)

Examples

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Embodiment Construction

[0041] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known functions or constructions are not described in order to avoid obscuring the invention.

[0042] Fig. 6 shows a block diagram of a direct-conversion receiver according to a preferred embodiment of the present invention, which can be used in a wireless mobile terminal. The receiver comprises: a Low Noise Amplifier 601 (LNA); two processing units 600a, 600b used as conversion means to down convert the modulated signal received from the antenna; two feedback loop circuits 600c, 600d , the feedback loop circuit is used as a regulating means to r...

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Abstract

A direct-conversion receiver for a mobile communication system for substantially removing DC offset to recover an information signal from a carrier signal modulated by the information signal is disclosed.

Description

technical field [0001] Generally, the present invention relates to direct conversion receivers for use in mobile communication systems. More particularly, the present invention relates to a direct conversion receiver for sufficiently removing DC offsets to recover an information signal from a carrier signal modulated by the information signal. Background technique [0002] Mobile communication systems have evolved from simple one-way (ie, paging) communication systems to two-way communication systems, including analog cellular systems and, more recently, digital cellular systems such as Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA). As the size and weight of wireless communication terminals have decreased significantly, terminals that fit comfortably in the palm of a person and weigh less than seven ounces are commonplace. However, previous receivers using conventional (super)heterodyne type technology have the limitation that they c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D3/00H04B1/30
CPCH04B1/30H03D3/008
Inventor 金成中
Owner SAMSUNG ELECTRONICS CO LTD