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IF chip and digital compensation method thereof

A digital compensation and chip technology, applied in measuring devices, instruments, measuring electrical variables, etc., can solve the problems of reduced reliability, high cost and technical complexity, achieve linearity performance improvement, save on-chip storage space, and simple calculation reliable results

Pending Publication Date: 2020-08-18
垣矽技术(青岛)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the IF linearity, the prior art generally requires digital algorithms for compensation. The usual solution is to use an integrated ADC (AD converter, such as ADUC847 and other chips embedded in MCU and memory) to program and realize its compensation algorithm. However, this solution High cost and technical complexity and reduced reliability

Method used

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  • IF chip and digital compensation method thereof
  • IF chip and digital compensation method thereof
  • IF chip and digital compensation method thereof

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Embodiment Construction

[0029] figure 1 is a schematic block diagram of an IF chip 10 according to an embodiment of the present invention. The IF chip 10 may generally include: a current input unit 110 , a conversion unit 120 , a pulse output unit 130 , a compensation unit 140 , and an on-chip memory 150 . The current input unit 110 is used for receiving the measured current signal, and the conversion unit 120 is used for converting the measured current signal input into the IF chip into a measured frequency value. The on-chip memory 150 is used to pre-store error calibration values. The compensation unit 140 is configured to execute the digital compensation method of the IF chip of this embodiment. The pulse output unit 130 is used to output a pulse signal, and the pulse frequency of the pulse signal is an output frequency value. The current input unit 110 , the conversion unit 120 , and the pulse output unit 130 are the basic functional units of the IF chip 10 , and their own circuits and functi...

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Abstract

The invention provides an IF chip and a digital compensation method thereof. The digital compensation method of the IF chip comprises the following steps: acquiring a measured current signal input into the IF chip and an actual measurement frequency value obtained by converting the measured current signal by a conversion unit of the IF chip; obtaining an error calibration value, wherein the errorcalibration value is pre-stored in an on-chip memory of the IF chip; determining a frequency compensation value corresponding to the measured current signal according to the error calibration value; and compensating the actually measured frequency value by using the frequency compensation value to obtain an output frequency value corresponding to the measured current signal. According to the scheme of the invention, the linearity performance of the IF chip is greatly improved, the IF conversion of a single chip is realized, and the cost is greatly reduced while the reliability is improved.

Description

technical field [0001] The invention relates to a semiconductor chip, in particular to an IF chip and a digital compensation method thereof. Background technique [0002] Current frequency conversion (IF conversion) is a common analog-to-digital signal conversion (AD conversion) method, which is widely used. Compared with the traditional AD conversion technology, the current-frequency conversion technology has the characteristics of simple circuit, small size, high sensitivity, large output amplitude, and good linearity. Current-frequency conversion specifically refers to the signal processing technology that converts the current input signal into a corresponding pulse output signal. The frequency value of the pulse output signal corresponds to the current amplitude of the input signal. The linearity of the current-frequency conversion is an important index indicating the performance of the current-frequency conversion, specifically referring to the linear relationship betw...

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Application Information

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IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 刘阳杨军叶晓斌
Owner 垣矽技术(青岛)有限公司