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Transimpedance type integrated band-pass filter design method

A band-pass filter and filter design technology, applied in the direction of impedance network, electrical components, multi-terminal pair network, etc., can solve the problems of complex design process and high sensitivity to component changes, and achieve low power consumption, low sensitivity, large Effect of the dynamic range filter

Inactive Publication Date: 2014-08-06
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high sensitivity to component changes and complex design process in the design of transimpedance integrated bandpass filters in the prior art, and to provide a design method for transimpedance integrated bandpass filters

Method used

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Experimental program
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Embodiment 1

[0066] A specific embodiment of the present invention adopts signal flow diagram method to design a transimpedance type band-pass filter, and its technical index is:

[0067] Lower passband cutoff frequency: f 1 =0.67MHz, upper pass band cut-off frequency: f u =1.5MHz;

[0068] Stop band lower limit cut-off frequency: f s1 =0.4MHz, stop band upper limit cut-off frequency: f su =2.5MHz;

[0069] The maximum attenuation allowed by the passband: A max =1dB, the minimum attenuation allowed by the stop band: A min =20dB;

[0070] R S =R L =10KΩ.

[0071] After frequency conversion, the amplitude-frequency characteristics of the low-pass filter can be obtained.

[0072] Exploitation =1, , the normalized technical index of the low-pass filter can be calculated as:

[0073] Passband cut-off frequency f p =1Hz, the maximum attenuation allowed by the passband: A max =1dB,

[0074] Stop band cut-off frequency: f s =2.53Hz, the minimum attenuation allowed by the stop ba...

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Abstract

A transimpedance type integrated band-pass filter design method includes the steps: (1) using a signal flow graph method to derivate a transimpedance type passive LC band-pass filter to obtain a signal flow graph of an LC filter; (2) using an invert integrator to realize the signal flow graph to obtain an all-pole transimpedance band-pass filter based on the invert integrator; (3) further replacing the invert integrator with an all-differential integrator to obtain a transimpedance type all-differential active RC band-pass filter circuit. The transimpedance filter designed according to the method can be directly connected with devices such as transducers, D / A (digital / analog) converters and the like directly outputting current, so that current-voltage conversion is avoided.

Description

technical field [0001] The invention belongs to the field of electronic information engineering and relates to a design method of a transimpedance integrated bandpass filter. Background technique [0002] Filters are the most widely used analog circuit components other than amplifiers, and are the core components that constitute filter circuits. The rapid development of communication technology and multimedia technology has put forward higher and higher requirements for signal processing. The filter is a key component of signal processing, and its performance directly affects the performance of the overall integrated circuit. Traditional filters are in the form of voltage input-voltage output. When it is connected to current-form components, a current-voltage converter needs to be connected in the middle, which increases the number of components and power consumption of the circuit. As a new type of filter, the transimpedance filter, whose input is a current signal and who...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/12
Inventor 轩秀巍李琨曹阳滕建辅
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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