Katelijn Vleugels

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A high-precision, low-voltage, low-power Σ∆ modulator has been designed using a delayed input feedforward architecture and a tracking multi-bit quantizer employing a single comparator. A 0.18-μm CMOS experimental prototype achieves 100 dB of dynamic range, 100-dB peak SNR and 95dB peak SNDR for a signal bandwidth of 25 kHz, while consuming only 870 μW of(More)
OBJECTIVES Hypertension is a major complication of overweight with frequently elevated aldosterone levels in obese patients. Our previous work suggests a direct stimulation of adrenal aldosterone secretion by adipocytes. Owing to aldosterone's important role in maintaining blood pressure homeostasis, its regulation in obesity is of major importance. One(More)
Obesity is one major risk factor for the development of arterial hypertension, and the development of obesity-related hypertension has been associated with increased plasma aldosterone levels. Our previous work shows a direct stimulatory effect of adipokines on aldosterone secretion from human adrenocortical cells, mediated via ERK1/2-dependent upregulation(More)
A novel method of noise reduction, referred to as zero-pole modulation and demodulation, is proposed for charge amplifiers in imaging and sensor systems. In this method, the input signal is passed through a zero-pole system without being modified. However, the noise at the output of the charge amplifier is reduced by the demodulation. An experimental charge(More)
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