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Asynchronous analog-to-digital converter

A technology of analog-to-digital converter and digital-to-analog converter, which is applied in the direction of analog-to-digital converter, analog-to-digital conversion, code conversion, etc., and can solve problems such as asynchrony

Active Publication Date: 2017-05-10
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time to convert the input analog to digital is usually asynchronous

Method used

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Embodiment Construction

[0021] Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following detailed description of the invention, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well known features have not been described in detail to avoid unnecessarily complicating the description.

[0022] Referring now to the accompanying drawings, and more specifically to Figure 1A , discloses a generalized example ADC 100A according to one embodiment of the present disclosure. ADC 100A includes an asynchronous front end (AFE) 102 that receives an analog differential input 122 and outputs an asynchronous digital output 124 . AFE 102 receives a control signal 126 from control logic module 116 and provides a differential er...

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Abstract

An asynchronous analog-to-digital converter (AADC) and a method (700) of using the AADC are shown. The AADC includes a digital-to analog-converter (DAC)(108), a continuous-time comparator (104) that provides an output including a digital value of the DAC and a time value, and a first and a second continuous-time summer (110A, 110B), each connected to receive an analog differential input (122) on a first input, to receive a differential output of the DAC (108) on a second input, and to provide a difference between the analog input and the output of the DAC to the continuous-time comparator (104) and to an error estimator (112). The continuous-time comparator (124) provides the output responsive to the difference between the analog input and the output of the DAC being zero.

Description

technical field [0001] The disclosed embodiments relate generally to the field of analog-to-digital converters (ADCs). More specifically, but not by way of limitation, this disclosure relates to new architectures for asynchronous ADCs. Background technique [0002] A wide variety of analog-to-digital converters (ADCs) are available for different applications at different sampling rates and resolutions, including synchronous and asynchronous ADCs. Synchronous ADCs are driven by a global clock and sample the signal at regular intervals, while asynchronous ADCs are clockless. Asynchronous ADCs (AADCs) can be classified into two categories: asynchronous logic types and asynchronous analog types. In an asynchronous logic ADC, the input is sampled at regular intervals. However, the time to convert the input analog to digital is usually asynchronous. In an asynchronous analog ADC, the input is not sampled; instead, the continuous-time input is continuously compared to a referen...

Claims

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Application Information

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IPC IPC(8): H03M1/12H03M1/00
CPCH03M1/002H03M1/125H03M1/48H03M1/52H03M3/04
Inventor D·加茵
Owner TEXAS INSTR INC