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This paper presents a fully integrated wireless electrocardiogram (ECG) SoC implemented in asynchronous architecture, which does not require system clock as well as off-chip antenna. Several low power techniques are proposed to minimize power consumption. At the system level, a newly introduced event-driven system architecture facilitates the asynchronous implementation, thus removes the system clock...
This paper presents a clockless fully-integrated wireless electrocardiogram (ECG) system-on-chip (SoC) for wearable ECG sensor. The clockless implementation is enabled by the combination of event-driven ADC and impulse-radio ultra-wideband transmitter, leading to an order of magnitude reduction in power. A DC-coupled analog front-end with a novel baseline stabilizer boosts the input impedance to several...
The method of conjugate-image impedance is used to design the matching network for the capacitive intra-body communication channel. Narrow passbands around 20 MHz are observed in the measured responses of the matched cases, where the transmission levels are about 20 dB higher than the unmatched ones. The method versatility is also validated.
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