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A system and method for attenuating a signal in a radio frequency system

A signal and radio frequency circuit technology, applied in the transmission system, reducing electrical interference, transmission monitoring, etc., can solve problems such as transmitter leakage

Inactive Publication Date: 2014-01-22
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some conventional systems deal with transmitter leakage by providing an input filter to strongly attenuate interfering RF signals

Method used

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  • A system and method for attenuating a signal in a radio frequency system
  • A system and method for attenuating a signal in a radio frequency system
  • A system and method for attenuating a signal in a radio frequency system

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Embodiment Construction

[0019] The making and using of the presently preferred embodiments are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

[0020] The invention will be described with respect to a preferred embodiment in the specific context of a system for canceling power leakage from a transmitter to a co-located receiver in an RF system. However, the invention is also applicable to other types of circuits and systems, such as data transmission systems, communication systems and other electronic systems.

[0021] In an embodiment, leakage power from the transmitter to the co-located receiver is attenuated by introducing a canceling signal at the input of the co-located receiver. figure 1 An embodim...

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Abstract

The invention relates to a system and method for attenuating a signal in a radio frequency system. In accordance with an embodiment, a method includes coupling power from a transmitter to form a first signal, conditioning the first signal to form a second signal, and coupling the second signal to an input of a receiver. Conditioning includes adjusting the second signal to combine in anti-phase with a leakage signal coupled from the transmitter to the input of the receiver such that the leakage signal is attenuated.

Description

technical field [0001] The present invention relates generally to semiconductor circuits and methods, and more particularly to systems and methods for attenuating signals in radio frequency (RF) systems. Background technique [0002] The increasing number of frequency bands and standards in mobile communication systems has added to the complexity of mobile phone design, as some mobile phones are now configured to operate by using multiple standards across multiple frequency bands. Additionally, the mobile phone may also include a Global Positioning System (GPS) receiver, an FM radio receiver, and a USB port. In many mobile phones, these multiple frequency bands and standards can be achieved by using multiple radio frequency (RF) transmitters and receivers in multiple signal paths that can be coupled to a single antenna, and / or be coupled to multiple antennas. However, the introduction of more and more frequency bands within mobile phones may cause some problems regarding j...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/52
CPCH04B1/3805H04B15/02H04B2001/0416H04B17/318
Inventor W·巴卡尔斯基A·德魏
Owner INFINEON TECH AG