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IF chip with digital compensation function and digital compensation method thereof

A digital compensation and chip technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve the problems of high cost and technical complexity, and achieve the effects of wide application range, cost reduction, and small storage capacity

Active Publication Date: 2021-02-09
垣矽技术(青岛)有限公司
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AI Technical Summary

Problems solved by technology

[0005] In order to improve the IF linearity, the existing technology generally requires digital algorithms to compensate, and the usual solution is to use an integrated ADC (AD converter, such as ADUC847 embedded in MCU to memory chips) to implement its compensation algorithm by programming, but the cost and technical complexity of this solution are very high

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

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Embodiment Construction

[0048] figure 1 is a schematic block diagram of an IF chip 10 according to one embodiment of the present invention, and figure 2 is a schematic circuit diagram of the IF chip 10 according to an embodiment of the present invention. The IF chip 10 may generally include: an analog processing module 110 , a digital processing module 120 , and a compensation current source 130 . In addition, as known to those skilled in the art, the IF chip 10 should also have input and output components such as current input ports and frequency signal output ports. The attached components of the class are not described in detail.

[0049] The analog processing module 110 is configured to obtain the measured current input to the IF chip 10 , and perform frequency conversion on the measured current to obtain an initial frequency pulse signal. The analog processing module 110 completes the conversion from the current signal to the frequency signal, and inevitably has conversion errors. In order ...

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Abstract

The invention provides an IF chip with a digital compensation function and a digital compensation method thereof. The IF chip comprises an analog processing module configured to obtain a measured current input into the IF chip and perform frequency conversion on the measured current to obtain an initial frequency pulse signal; a digital processing module configured to generate a corresponding compensation control signal according to the initial frequency pulse signal; a compensation current source configured to adjust the magnitude of compensation current output by the compensation current source according to the compensation control signal, so that the compensation current and the measured current are superposed to obtain superposed current; and an analog processing module also configuredto perform frequency conversion on the superimposed current to obtain an output frequency pulse signal. According to the scheme of the invention, the compensation precision is improved, the bandwidthof the originally output frequency signal is not affected, the application range is wider, the reliability is improved, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to a semiconductor chip, in particular to an IF chip with a digital compensation function 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 refe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32
CPCH03F1/32
Inventor 刘阳姚国钦肖文锐叶晓斌杨军
Owner 垣矽技术(青岛)有限公司
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