Window type successive approximation analog-to-digital converter and control method

An analog-to-digital converter and successive approximation technology, applied in the direction of analog-to-digital converter, analog-to-digital conversion, code conversion, etc., can solve the problems of high power consumption of voltage domain comparator and low efficiency of binary approximation, and achieve power consumption optimization , the effect of improving linearity

Pending Publication Date: 2021-04-30
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Based on this, the present invention proposes a window-type successive approximation analog-to-digital converter and a control method for the problems of high power con

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  • Window type successive approximation analog-to-digital converter and control method
  • Window type successive approximation analog-to-digital converter and control method
  • Window type successive approximation analog-to-digital converter and control method

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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] The structural block diagram of the window-type successive approximation analog-to-digital converter provided by the implementation example of the present invention is as follows figure 1 Shown, including capacitor array digital-to-analog converter, time domain comparator and control logic. The input terminal of the capacitor array digital-to-analog converter is connected to the analog input signal and the output terminal of the control logic, and its output terminal is connected to the input terminal of the time domain comparator; the time domain comparator is used to compare the digital-to-analog conversion of the capacitor array The signal generated by the device, the comparison result is output by the output terminal, and the output terminal is connected to the input terminal of the control logic; the output terminal of the control l...

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Abstract

The invention discloses a window type successive approximation analog-to-digital converter and a control method. The window type successive approximation analog-to-digital converter specifically comprises a capacitor array digital-to-analog converter, a time domain comparator and control logic. According to the invention, the window voltage is set according to the information of the relative magnitude of the input voltage provided by the time domain comparator, and whether a redundant comparison period is skipped or not is determined according to the relationship between the voltage of the polar plate on the capacitor array and the window voltage in the successive approximation process, thereby achieving the purpose of power consumption optimization.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, in particular to a window-type successive approximation analog-to-digital converter and a control method. Background technique [0002] With the continuous development of Internet of Things technology, the "Internet of Everything" is getting closer to people's lives. As the core of the Internet of Things system, the power consumption of sensor nodes has become one of the important factors restricting the performance of the sensor system. One of the core components of the sensor - the performance of the analog-to-digital converter determines the performance of the sensor to a large extent. Sensor nodes usually have strict requirements on power consumption. Therefore, successive approximation analog-to-digital converters with low power consumption, medium resolution and medium conversion speed are especially suitable for sensor nodes. [0003] In the traditional successive approximati...

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Application Information

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IPC IPC(8): H03M1/46H03M1/12
CPCH03M1/462H03M1/1245
Inventor 谢良波任彦周牧王勇聂伟杨小龙
Owner CHONGQING UNIV OF POSTS & TELECOMM
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