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Front-end receiving circuit and front-end receiving method applied to the same

A technology for receiving circuits and back-end circuits, applied to the front-end receiving circuit and its front-end receiving field, can solve the problems of increasing circuit power consumption and area, increasing circuit noise, etc., and achieve the effect of low power consumption and low area

Active Publication Date: 2020-01-31
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this amplifier itself must use high-voltage components, which will increase the power consumption and area of ​​the circuit, and increase the noise of the circuit

Method used

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  • Front-end receiving circuit and front-end receiving method applied to the same
  • Front-end receiving circuit and front-end receiving method applied to the same
  • Front-end receiving circuit and front-end receiving method applied to the same

Examples

Experimental program
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no. 1 example

[0058] see figure 1 , which is a circuit structure diagram of the front-end receiving circuit according to the first embodiment of the present invention. refer to figure 1 As shown, the first embodiment of the present invention provides a front-end receiving circuit 100 connected to a back-end circuit 140. The front-end receiving circuit 100 includes a first input terminal 101 for receiving the first signal Vin-, and a first input terminal 101 for receiving the second signal Vin+. Two input terminals 102 , a comparator 110 , a first sampling switch SS1 , a first sampling shift circuit 120 and a control circuit 130 .

[0059]The comparator 110 has a first comparator input terminal 111 and a second comparator input terminal 112 respectively connected to the first input terminal 101 and the second input terminal 102 . The first sampling switch SS1 is connected between the first input terminal 101 and the first comparator input terminal 111 . The first sampling shift circuit 12...

no. 2 example

[0078] see Figure 4 , which is a circuit structure diagram of the front-end receiving circuit according to the second embodiment of the present invention. refer to Figure 4 As shown, the second embodiment of the present invention provides a front-end receiving circuit 100 connected to a back-end circuit 140. The front-end receiving circuit 100 includes a first input terminal 101 for receiving the first signal Vin-, and a first input terminal 101 for receiving the second signal Vin+. Two input terminals 102 , a comparator 110 , a first sampling switch SS1 , a first sampling shift circuit 120 and a control circuit 130 . In this embodiment, similar elements use similar element symbols, and this embodiment is based on figure 1 The description is based on the above, so repeated descriptions are omitted.

[0079] The difference from the foregoing embodiments is that the front-end receiving circuit 100 further includes a fourth sampling switch SS4 , a fifth sampling switch SS5 a...

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PUM

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Abstract

The invention discloses a front-end receiving circuit and a front-end receiving method applied to the same. The front-end receiving circuit comprises a first input end for receiving a first signal, asecond input end for receiving a second signal, a comparator, a first sampling switch, a first sampling displacement circuit and a control circuit. The first sampling switch is connected between the first input end and the first comparator input end. The first sampling displacement circuit comprises a first capacitor, a first reference voltage source and a second reference voltage source. The control circuit is configured to be electrically connected with the control ends of the first sampling switch, the second sampling switch and the first displacement switch. In the sampling mode, the control circuit is configured to control the first sampling switch and the second sampling switch to be switched on and the first displacement switch to be switched off. In the displacement mode, the control circuit is configured to control the first sampling switch and the second sampling switch to be turned off, and the first displacement switch is turned on.

Description

technical field [0001] The present invention relates to a front-end receiving circuit and a front-end receiving method used therein, in particular to a front-end receiving circuit capable of performing voltage displacement to reduce the voltage received by the back-end circuit after the sampling circuit samples a high-voltage input signal and method. Background technique [0002] In the existing Ethernet or TV front-end receiving circuit, when the RX input signal is at a high voltage level, the components receiving the input signal must use high-voltage components, otherwise the service life of the components will be too short or the components will burn out. [0003] For the TV front-end receiving circuit, by adding a high-voltage to low-voltage amplifier, the amplifier back-end circuit connected to the output of the amplifier can use low-voltage components. However, the amplifier itself must use high-voltage components, which will increase the power consumption and area o...

Claims

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Application Information

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IPC IPC(8): H04B1/16
CPCH04B1/16H04B1/1607H04B1/1615
Inventor 雷良焕林见儒黄诗雄
Owner REALTEK SEMICON CORP