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This paper introduces a portable ECG monitor with USB host Interface. This system uses Microprocessor C8051F021 as its controlling core, and SL811HS as USB host Interface chip. Based on this hardware, the paper presents USB host specification stack, specification frame about USB Mass Storage and FAT file system so that the collected ECG signals can be stored in U-Disk without delay. In addition, the...
Time-interleaved (TI) sigma-delta modulators are sensitive to channel-mismatches. In this paper, a new type of noise transfer function (NTF) which is a band-pass filter is adopted for the two-channel TI modulators to reduce the folded noise. Employing the concept of block digital filtering and theory of multirate operations, a novel two-channel TI high-order modulator is derived from the prototype...
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