Automatic gain control circuit, integrated circuit, electronic device and method of automatic gain control

A technology of automatic gain control and electronic devices, applied in the direction of gain control, amplification control, electrical components, etc., can solve inaccurate problems

Inactive Publication Date: 2014-12-24
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it tries to recover, if the large input signal condition is not removed, the ADC will cycle repeatedly between reset and recovery, as shown in filter output waveform 310, and due to AGC overload detection, for repeated clipping of 325, the resulting output may look ambiguous

Method used

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  • Automatic gain control circuit, integrated circuit, electronic device and method of automatic gain control
  • Automatic gain control circuit, integrated circuit, electronic device and method of automatic gain control
  • Automatic gain control circuit, integrated circuit, electronic device and method of automatic gain control

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Embodiment Construction

[0039] Embodiments of the present invention are described based on an integrated circuit and an automatic gain control method, the integrated circuit includes: an automatic gain control (automatic gain control, AGC) circuit, and the AGC circuit includes: an electronic device (such as a wireless communication unit) An analog to digital converter (analog-to-digital converter, ADC) part. The embodiment of the present invention describes that in a wireless communication unit (such as a base station), as a universal mobile telecommunications system (universal mobile telecommunications system, UMTS TM ) in the Third Generation Partnership Project (3 rd generation partnership project, 3GPP TM ) communication standard a Node B, Node-B), or in a subscriber wireless communication unit (subscriber wireless communication unit) (which in 3GPP TM An AGC is applied in a receiver structure called user equipment (UE), and the AGC in the receiver structure is used to adjust their received si...

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Abstract

The invention provides an automatic gain control circuit, an integrated circuit, an electronic device and a method of automatic gain control. The automatic gain control circuit includes an input gain stage for receiving and amplifying an analog input signal; an analog-to-digital converter for receiving the amplified analog input signal and providing a digital output signal; and an overload management module. The overload management module is arranged to receive the digital output signal; determine therefrom whether the received, amplified analog input signal exceeds an operating range of the analog-to-digital converter; and provide a first control signal to the input gain stage to adjust a gain of the input gain stage in response thereto. The above technical scheme may be arranged to prevent signal integrity issues that may otherwise happen before the AGC has time to adjust the overall gain of the system.

Description

technical field [0001] The present invention relates to an analog-to-digital converter (ADC) circuit, an integrated circuit, an electronic device (such as a wireless communication unit) and a method for managing overload conditions of the ADC. The invention is applicable to, but not limited to, an integrated circuit including an ADC for modem applications in a wireless communication unit. Background technique [0002] In the field of wireless communication systems and communication units, the wireless communication systems and communication units include transmitter and receiver functions. A typical part of the receiver part is an Automatic Gain Control (AGC) loop. AGC loops are typically used to keep signal levels sufficient to pass through the signal path and avoid saturating any part of the receiver while maximizing a signal-to-noise ratio required in the receiver's optimal operating conditions. ratio). The AGC loop circuit and any associated algorithm (algorithm) opera...

Claims

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Application Information

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IPC IPC(8): H03G3/30
CPCH03M1/185
Inventor 斯钧儒何适杰弗里卡尔吉罗
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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