Single-channel ECG (Electrocardiogram) collection chip

Abstract

The invention relates to a single-channel ECG (Electrocardiogram) collection chip comprising an input buffer module used for collecting signals of external electrodes, a pre-amplification module used for performing the first-stage amplification on the signals of the external electrodes, a dual-end to single-end module used for receiving the first-stage amplified signals, converting the signals into single-ended signals and outputting the single-ended signals, a filtration module used for filtering the single-ended signals, a final-stage amplification module used for performing the second amplification on the single-ended signals filtered by a low-pass filter circuit, and an output buffer module used for outputting the single-ended signals with the second amplification. According to the single-channel ECG collection chip disclosed by the invention, the modules are integrated on a silicon wafer, thus the cost is reduced.

Description

technical field [0001] The invention relates to the field of medical chips, in particular to a single-channel ECG acquisition chip. Background technique [0002] With the development of the mobile medical industry, portable medical terminals such as mobile health equipment and personal portable medical monitoring are playing an increasingly important role in the entire medical industry. As an important part of the mobile and portable medical terminal, the medical acquisition chip plays an important role in collecting physiological signals. [0003] At present, the main way to collect ECG signals is to build board-level circuits, which will occupy a large area. On the market, Texas Instruments (TI) already has a front-end acquisition chip ADS1298 suitable for ECG detection. Its structure includes a front-end adjustable gain pre-amplification circuit, an analog-to-digital conversion (ADC) module, a right leg driver module, and a lead detection module. . However, this chip d...

AI Technical Summary

Problems solved by technology

However, this chip does not perform traditional analog filtering processing inside, but obtains digital signals through an ultra-high-precision (24-bit) ADC module, and then performs digital filtering, which is costly to implement

[0004] On the technology of on-chip analog filtering, there have been certain researches on integrated circuits for collecting physiological signals such as ECG at home and abroad, literature [Wattanapanitch, W.; Fee, M.; Sarpeshkar, R.;, "An Energy- Efficient Micropower Neural Recording Amplifier, "Biomedical Circuits and Systems, IEEE Transactions on, vol.1, no.2, PP.136-147, June2007] discloses a kind of integrated circuit structure applied to the collection of neural electrical signals, which realizes The amplification and filtering function of the analog front-end for neural electrical signal acquisition, but it needs to be further optimized in terms of noise, common mode rejection and other characteristics

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