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Multiplex analog-to-digital conversion device

An analog-to-digital conversion and analog-to-digital converter technology, applied in the direction of analog-to-digital conversion, analog-to-digital converter, code conversion, etc., can solve the problems of mismatch, large area and power consumption, and reduce circuit power consumption, Small area and power consumption, the effect of reducing the circuit area

Active Publication Date: 2012-03-14
NATIONZ TECH INC
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since two ADCs are used for I / Q signals, their area and power consumption are relatively large, and there is still a mismatch between ADCs

Method used

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  • Multiplex analog-to-digital conversion device

Examples

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Embodiment Construction

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Such as figure 1 As shown, the multiplexing analog-to-digital conversion device of the present invention includes a first sample-hold circuit 1, a second sample-hold circuit 2, a multiplexer 3 and an analog-to-digital converter 4, wherein the first sample-hold circuit 1 and the second sample-hold circuit The circuit 2 is electrically connected to the multi-way switch 3 respectively, and the multi-way switch 3 is electrically connected to the analog-to-digital converter 4 .

[0020] The first sample and hold circuit 1 and the second sample and hold circuit 2 respectively receive the I signal and the Q signal in the I / Q signal, the I signal passes through the first sample and hold circuit 1 and becomes the IOUT...

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PUM

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Abstract

The invention relates to a multiplex analog-to-digital conversion device which comprises two sampling maintenance circuits, a multi-path switch and an analog-to-digital converter, wherein the two sampling maintenance circuits are electrically connected with the multi-path switch; the analog-to-digital converter is electrically connected with the multi-path switch; the two sampling maintenance circuits respectively receive an I signal and a Q signal in I / Q signals and transmit the I signal and the Q signal to the multi-path switch; the multi-path switch changes the received I signal and Q signal into an I / Q staggered signal and transmits the I / Q staggered signal to the analog-to-digital converter; and the analog-to-digital converter processes the received I / Q staggered signal. According to the invention, the I / Q staggered signal is processed by utilizing one analog-to-digital converter, thereby realizing that the I / Q signal multiplexes the same analog-to-digital converter, reducing the area of a circuit and reducing the power of the circuit.

Description

technical field [0001] The invention relates to a signal processing device, in particular to a device for processing I / Q signals by using an analog-to-digital converter. Background technique [0002] ADC (Analog-to-Digital Converter, analog-to-digital converter) is an essential module for radio frequency transceiver chips or other systems and chips with I / Q (In-phase / Quadrature, co-direction quadrature) signals. RF transceiver chips and digital baseband chips are the most important chips in mobile phone systems, so ADCs are also essential in mobile phone systems. [0003] When the RF transceiver chip is working, it receives the signal in the channel and demodulates the signal into an I / Q signal through the mixer. The phase difference of the I / Q signal is 90 degrees. The I / Q signal is processed by the analog baseband and then sent to the ADC. The current common practice is to use two ADCs, one ADC for the I signal and another ADC for the Q signal. Since two ADCs are used fo...

Claims

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Application Information

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IPC IPC(8): H03M1/12H03M1/54
Inventor 赵辉沈晔
Owner NATIONZ TECH INC
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