Charge transmission loss rate detection method and implementation circuit thereof
A technology of charge transfer and detection method, applied in the direction of analog/digital conversion calibration/test, etc., can solve problems such as the fluctuation error of charge transfer efficiency, and achieve the effect of improving conversion accuracy and overcoming accuracy limitations
Inactive Publication Date: 2010-07-28
58TH RES INST OF CETC
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For charge-coupled pipeline analog-to-digital converters with a precision of more than 12 bits, the fluctuation error of charge transfer efficiency brought by the existing process conditions cannot be ignored, so it is necessary to provide a method that can automatically detect the loss rate of charge transfer to overcome process fluctuations The effect of fluctuations in charge transport efficiency brought about by
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[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0031] Such as figure 2 As shown, the present invention detects the charge transmission loss rate in the charge-coupled pipeline analog-to-digital converter, and its workflow includes 4 steps: input 21 of the reference charge packet, compare and quantify the charge packet 22, and set the charge transmission loss rate Fluctuation error distribution table 23 and look-up table 24 in the error distribution table according to the charge packet comparison quantification result. Through the above steps, the charge transmission loss rate of the charge-coupled pipeline analog-to-digital converter is obtained.
[0032] The required reference charge packet of step 21 can be produced by the reference signal generating circuit of the analog-to-digital converter; step 22 is completed by the reference charge comparison quantization module 31; the settin...
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The invention provides a method for detecting charge transmission loss rate in a charge coupling pipeline A / D converter; the work process thereof includes the steps that a standard charge packet is input, comparison quantization is carried out on the charge packet, a charge transmission loss rate fluctuation error distribution list is set and table lookup is carried out in the error distribution list according to the charge comparison quantization result. The charge transmission loss rate detection method of the invention can automatically detect charge transmission loss rate in charge coupling pipeline A / D converter, influence caused by charge transmission loss rate fluctuation is controlled to be within lowest resolution requirement, so as to overcome the problem that precision of the existing charge coupling pipeline A / D converter is restricted by charge transmission loss rate fluctuation and further the conversion precision of the existing charge coupling pipeline A / D converter.
Description
technical field [0001] The invention relates to a detection method and a realization circuit of the non-ideal characteristics of a charge-coupled pipeline analog-to-digital converter, in particular to a detection method and a realization circuit of a charge transmission loss rate in a charge-coupled pipeline analog-to-digital converter. Background technique [0002] With the continuous development of digital signal processing technology, the digitization and integration of electronic systems is an inevitable trend. However, most signals in reality are continuously changing analog quantities, which need to be transformed into digital signals through analog-to-digital conversion before they can be input into digital systems for processing and control. Therefore, analog-to-digital converters are indispensable in future digital system design. made of. In applications such as broadband communications, digital high-definition television, and radar, systems require analog-to-digit...
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IPC IPC(8): H03M1/10
Inventor 陈珍海季惠才黄嵩人
Owner 58TH RES INST OF CETC