Unlock instant, AI-driven research and patent intelligence for your innovation.

RF front-end circuit, filter calibration system, and method for tuning a RF front-end circuit

A radio frequency front-end, calibration system technology, applied in the transmission system, electrical components and other directions, can solve the problem of no signal reception, etc., to achieve the effect of automatic tuning

Active Publication Date: 2014-09-24
MEDIATEK SINGAPORE PTE LTD SINGAPORE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this is that when the headset is disconnected from the receiver, there is no signal reception
However, there is still a problem in the background art, how to automatically and accurately measure the resonant frequency of the tank to tune it to an appropriate value

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • RF front-end circuit, filter calibration system, and method for tuning a RF front-end circuit
  • RF front-end circuit, filter calibration system, and method for tuning a RF front-end circuit
  • RF front-end circuit, filter calibration system, and method for tuning a RF front-end circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned in the description and the claims is an open term, therefore, it should be interpreted as "including but not limited to". Furthermore, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0022] The present invention provides a radio frequen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a radio-frequency (RF) front-end circuit, a filter calibration system, and a method for tuning a RF front-end circuit. The RF front-end circuit includes a tunable filter, a negative transconductance circuit coupled with the tunable filter to produce a tuning oscillation signal, and a counter arranged to determine a frequency of the tuning oscillation signal. The RF front-end circuit also includes a control circuit arranged to shift the frequency of the tuning oscillation signal by adjusting the tunable filter until the frequency of the tuning oscillation signal falls within an acceptable frequency range corresponding to a desired channel frequency band. By using a feedback loop, the frequency of the RF transceiver front-end circuit and the filter calibration system can be tuned quickly and automatically.

Description

technical field [0001] The present invention relates to tuning (radio-frequency, RF) front-end (radio-frequency, RF) front-end (front-end) circuit with embedded antenna (tuning), especially relates to a chip (on-chip) negative transconductance (trans-conductance) by using (on-chip) The circuit tunes a radio frequency front-end circuit to a desired radio frequency bandwidth to form an oscillator, a radio frequency front-end circuit and a filter correction system. Background technique [0002] Radio frequency receivers are widely used in televisions, cellular phones, pagers, global positioning system (GPS) receivers, cable modems, cordless phones, radios and other devices that receive radio frequency signals. For example, in the United States, for frequency modulated (FM) audio transmission, FM audio signals are broadcast in a frequency band of 76 MHz to 108 MHz. [0003] In conventional systems that receive terrestrial audio transmissions, filter circuits are typically used ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/00H04B1/16H04B1/40
Inventor 乌萨马KA萨那江旭东廖进兴
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE