On-chip band-pass filter applied to cableless seismograph

Abstract

The invention discloses an on-chip band-pass filter applied to a cableless seismograph. The filter comprises a first metal zigzag line, a second metal zigzag line, a grounding shielding layer, a first MIM capacitor, a second MIM capacitor, an input feeder line and an output feeder line; and an input end is connected with the input feeder line, the input feeder line is connected to the first metal zigzag line, an output end is connected with the output feeder line, and the output feeder line is connected with the first metal zigzag line. The second metal meander line structure is bent inside the first metal meander line, the first metal meander line and the second metal meander line are in Y-axis symmetry, and the first metal meander line is connected to the peripheral grounding shield in the Y-axis direction. The filter has the advantages that the area of the on-chip band-pass filter can be reduced in a limited mode, and meanwhile strong coupling is achieved. And the two MIM capacitors positioned below the feeder line reasonably utilize a multi-layer structure, so that the area of the chip is further reduced. The on-chip band-pass filter can be applied to a wireless radio frequency module in a cableless seismograph, and useless disordered interference signals can be well filtered out.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to an on-chip band-pass filter applied to a cable-free seismograph. Background technique [0002] As demand for oil and gas continues to grow, so does the need for fast, high-quality seismic data acquisition worldwide. As a result, seismic survey coverage, density, and overall cost are all increasing. Traditional seismic data transmission uses cable systems for transmission. Cables are reliable and effective in transmitting such a large amount of data, but they account for nearly 50% of the cost and 75% of the weight of the equipment, requiring more vehicles and manpower. The logistical cost of transporting and deploying cables by hand is enormous, and the cables impose constraints on the geographic deployment of geophones, problems that new cable-free seismometers can address. The radio frequency module of the wireless motherboard is the key module of the new cable-fr...

AI Technical Summary

Problems solved by technology

[0003] In the existing filter technology, there are the following defects: Although the traditional ring resonator has achieved good performance, the chip size of the filter is relatively large

However, this method can only provide a limited amount of attenuation in the small bandwidth of the stop band, and the performance is greatly compromised

Therefore, it is extremely challenging to provide a sufficiently wide bandwidth while keeping the on-chip bandpass filter miniaturized

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