Difference Miller band-pass filter and signal filtering method

A bandpass filter, differential technology, applied in the field of differential Miller bandpass filter and signal filtering, can solve the problems of small dynamic range, occupation, large chip area, etc., to reduce chip area, reduce power consumption, increase 3dB bandwidth effect

Active Publication Date: 2017-03-22
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When H(jω) composed of passive RC is applied to an N-channel filter unit, although a very narrow bandwidth can be obtained, it will occupy a large chip area and have a small dynamic range

Method used

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  • Difference Miller band-pass filter and signal filtering method
  • Difference Miller band-pass filter and signal filtering method
  • Difference Miller band-pass filter and signal filtering method

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Embodiment Construction

[0052] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0053] like figure 1 and figure 2 As shown, the differential Miller bandpass filter includes an amplifier 1, a first N-channel feedback network 2, a second N-channel feedback network 3 and two clock generators 4;

[0054] The amplifier 1 is used for differential input signals, and at the same time performs input matching through resistance feedback, increases the voltage gain of the input signal, and performs signal amplification; it is also used for differential output of filtered signals;

[0055] The two clock generators 4 are respectively connected to the first N-channel feedback network 2 and the second N-channel feedback network 3, and are respectively used to generate periodic sampling pulse sequences to be...

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Abstract

The present invention relates to a difference Miller band-pass filter and a signal filtering method. The filter comprises an amplifier, a first N-channel feedback network, a second N-channel feedback network and two clock generators; the amplifier performs difference input signals and input matching through the resistance feedback to increase the voltage gain of the input signals for signal amplification, and performs difference output of the signals after filtering; the two clock generators generate periodic sampling pulse sequences and transmit the periodic sampling pulse sequences to the first N-channel feedback network and the second N-channel feedback network; and the first N-channel feedback network and the second N-channel feedback network weaken the signals out of the channels, perform center frequency regulation and conduction operation according to the sampling pulse sequences and perform filtering of the amplified signals. Compared to the prior art, the difference Miller band-pass filter and the signal filtering method can increase the signal gain, increase the 3dB bandwidth of a filter, effectively reduce the chip area and reduce the power consumption of the local oscillator branch.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a differential Miller bandpass filter and a signal filtering method for radio frequency channel selection. Background technique [0002] Modern civilian and military facilities use a lot of electronic equipment, the electromagnetic environment is complex, and mutual interference is serious. Generally, the communication equipment transceivers on vehicles, boats and airplanes are integrated together. Therefore, the radio frequency receiver needs to detect the required weak signal from the harsh real environment. Since the power of the interfering signal may be much greater than the required signal power, this requires the receiver to have good selectivity, and the filter plays the role of channel selection. [0003] Therefore, the band-pass filter applied in the wireless receiver needs to have good selectivity, wide dynamic range and freely adjustable center frequency. Active RC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/12
CPCH03H11/1213
Inventor 宋树祥张昊璞岑明灿蔡超波蒋品群
Owner GUANGXI NORMAL UNIV
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