Programmable gain digital-analog unit and analog-to-digital converter

An analog-to-digital converter and digital-to-analog unit technology, applied in the direction of analog-to-digital converter, gain control, electrical components, etc., can solve the problems of cost, technical difficulty, excess performance, etc., to avoid excessive cost, frequency and frequency difference. Adaptive power consumption, avoiding the effect of energy

Active Publication Date: 2014-07-23
西安电子科技大学重庆集成电路创新研究院
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Problems solved by technology

The advantages of this solution are small area and low cost. For different communication protocols, they all rely on an ADC to solve the problem. The disadvantage is that

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  • Programmable gain digital-analog unit and analog-to-digital converter
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  • Programmable gain digital-analog unit and analog-to-digital converter

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Embodiment Construction

[0022] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0023] Embodiments of the present invention provide a programmable gain digital-to-analog unit and an analog-to-digital converter, which can make the operating current of the operational amplifier of the gain digital-to-analog conversion unit linearly related to the sampling frequency, so that the sampling frequency and power consumption of the analog-to-digital converter can be automatically correlated. purpose of adaptation.

[0024] The programmable gain digital-to-analog unit of the embodiment of the present invention is applied in an analog-to-digital converter, wherein the operating current of the operational amplifier of the programmable-gain digital-to-analog unit has a linear relationship with the sampling frequency of the anal...

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Abstract

The invention provides a programmable gain digital-analog unit and an analog-to-digital converter and belongs to the field of analog-to-digital converters. The programmable gain digital-analog unit is applied to the analog-to-digital converter, and working current of an operational amplifier of the programmable gain digital-analog unit has a linear relationship with a sampling frequency of the analog-to-digital converter. With the adoption of the technical scheme, the working current of the operational amplifier of the gain digital-analog conversion unit is linearly dependent on the sampling frequency, a purpose of realizing self adaption of the sampling frequency of the analog-to-digital converter to power consumption is achieved, and a programmable current source array controlled by an SPI (Serial Peripheral Interface) port can adjust and optimize circuit performance after tape-out at the same time.

Description

technical field [0001] The invention relates to the field of analog-to-digital converters, in particular to a programmable gain digital-to-analog unit and an analog-to-digital converter. Background technique [0002] Due to the rapid growth of wireless communication and the diversification of image, video, audio and other applications, the requirements for the accuracy and speed of analog-to-digital converters (ADC) are also increasing. The analog bandwidth ranges from 200kHz to hundreds of megahertz, which requires Analog-to-digital converters with different sampling rates. [0003] In order to realize the analog-to-digital converter with variable sampling rate, there are currently two traditional solutions in the industry: The first solution is to integrate several dedicated ADCs in parallel, and each communication protocol corresponds to an ADC. The advantage of this solution is that it is low Power consumption, when one ADC is working, other ADCs are turned off. Each pr...

Claims

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Application Information

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IPC IPC(8): H03M1/12H03G3/30
Inventor 刘术彬朱樟明丁瑞雪杨银堂
Owner 西安电子科技大学重庆集成电路创新研究院
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