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Envelope detector and related method

A detector and signal detection technology, applied in transmission systems, electrical components, etc., can solve problems such as the inability to effectively eliminate common mode noise/transient effects, data errors, etc.

Active Publication Date: 2012-12-19
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter whether the signal at the input end carries data or not, it is distorted because the signal has been affected by the transient state; even if the data is interpreted, the obtained data is wrong
In other words, the known squelch detector 10 cannot effectively reject the effects of common mode noise / transients

Method used

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  • Envelope detector and related method
  • Envelope detector and related method
  • Envelope detector and related method

Examples

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Embodiment Construction

[0072] Please refer to image 3 , which is a schematic diagram of an envelope detector 40 configured in a chip (integrated circuit, die) 30 according to an embodiment of the present invention. The chip 30 is packaged in a package 38 and mounted on a circuit board (eg, a printed circuit board) 36 . The remote electronic device 32 outputs differential data to the chip 30 through a pair of differential output terminals TXP and TXM. The output terminals TXP, TXM are respectively coupled to the connector of the circuit board 36 via the cables 34a, 34b, and then coupled to one of the chip 30 via the traces on the circuit board, the pins of the package 38 and the bonding (bonding). For the differential input pads PDp and PDm, the envelope detector 40 provided in the chip 30 performs squelch detection for a pair of differential signals Vinp and Vinn on the pads PDp and PDm, and provides a signal OUT as Squelch detection signal. The signal OUT of the envelope detector 40 can be matc...

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Abstract

The invention relates to an envelope detector and a related method. Silencing detection is performed in a pair of differential signals. The method comprises the following steps of: in a voltage division circuit, providing an instant reference signal according to the total of the differential signals; and comparing the instant reference signal with two comparison signals related to the differential signal to generate a silencing detection signal.

Description

technical field [0001] The present invention relates to an envelope detector and related methods, and in particular to an envelope detector with low cost, simple circuit structure, low power consumption, small area and suitable for high-bandwidth differential signal squelch detection and related methods. Background technique [0002] In modern communication systems, it is common to have a mechanism to distinguish an incoming signal as a processable signal carrying valid data or as noise. Generally speaking, the I / O interface of a communication system chip is coupled to other electronic devices / circuits / chips outside the chip through cables and / or traces on the circuit board to receive information from other electronic devices / circuits / chips. data / message. For example, the I / O interface of the communication system chip may be provided with an input terminal, such as a pair of differential input pads, for receiving differentially transmitted data (such as information and / or ...

Claims

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Application Information

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IPC IPC(8): H04B1/12
Inventor 谢宜政
Owner MEDIATEK INC
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