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This paper presents the design and fabrication of a wireless, highly miniaturized, low-power electrochemical pH sensing system employing complementary metal-oxide–semiconductor (CMOS) electronics. Since plasma pH readings directly correlate to carbon dioxide levels present in the human body, this paper holds great promise for continuous monitoring of carbon dioxide in totally implantable device applications...
In this paper, we propose a low-power dual-modulus injection-locked frequency divider (ILFD) based on a relaxation oscillator, which is shown to be suitable for injection-locked frequency divider design. By varying the center frequency based on the modulus control bit, the divider can achieve different division ratios. For validation, two dual-modulus ILFDs which can achieve different division ratios...
Low-power wireless telemetry is extremely important for non-invasive monitoring of biomedical sensor signals. Usually for successful monitor of various physiological parameters, an implantable sensor incorporates a transmitter unit to send the sensor data outside of the human body for further diagnostics. This paper reports a new low-power frequency shift keying (FSK) modulator for a biomedical sensor...
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