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Conduction-cross circuit module and RF filter

A technology of radio frequency filters and conductive circuits, applied in logic circuits, amplifiers with semiconductor devices/discharge tubes, frequency-independent attenuators, etc.

Inactive Publication Date: 2011-11-23
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter is designed to give the maximum frequency level with minimum ripple at the filter's bandpass frequency, while the former is designed to behave in essentially the same way, but with a time delay

Method used

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  • Conduction-cross circuit module and RF filter
  • Conduction-cross circuit module and RF filter
  • Conduction-cross circuit module and RF filter

Examples

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Embodiment Construction

[0060] This specification discloses one or more embodiments that incorporate the features of the present invention. It should be noted that these embodiments and the "one embodiment", "an embodiment", "exemplary embodiment", etc. mentioned in this specification mean that the described embodiment may include a specific feature or structure. Or features, but not every embodiment necessarily includes the specific feature, structure, or feature. Furthermore, these phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, regardless of whether it is explicitly stated, those skilled in the art should know that these specific features, structures, or characteristics can also be combined with other embodiments.

[0061] image 3 A wireless receiver 300 according to an embodiment of the invention is shown. The wireless receiver 300 includes an antenna 305, a low noise amplif...

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Abstract

There are various mobile communication standards such as GSM, EDGE, and W-CDMA. For a GSM or EDGE system, a receiver (300) must be configured to work with an IF signal with a center frequency and bandwidth of 200 KHz. For WCDMA system, the same receiver (300) must be configured to work with an IF signal with a center frequency of 600KHz to 1000KHz and band width of 2000KHz. Accordingly, a configurable frequency IF filter with the capability to operate with multiple standards is provided.

Description

Technical field [0001] The invention relates to a reconfigurable / programmable intermediate frequency (IF) filter. Background technique [0002] Currently, many radio frequency (RF) receivers are superheterodyne receivers. figure 1 The illustrated RF receiver 100 uses the heterodyne principle to down-convert and demodulate data from the RF signal. Generally, due to the inherent relationship between RF wavelength and antenna size, data will be transmitted with high-frequency signals. This high-frequency signal used to piggy back the lower-frequency information signal is called a carrier signal. [0003] In a heterodyne system, the received signal is mixed with another locally generated signal to remove the carrier signal from the transmitted RF signal. This mixing process can obtain multiple signals in various frequency bands. The frequency band of interest is the system's intermediate frequency (IF), which includes the modulated form of the data signal. Such as figure 1 As shown...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H11/04H03K19/00
CPCH03F2200/111H03H11/24H03F2203/7209H03F2203/7236H03F3/211H03H11/04H03F3/72H03F2203/21178
Inventor 李强
Owner AVAGO TECH WIRELESS IP SINGAPORE PTE