A Power-Efficient Readout for Wheatstone-Bridge Sensors With COTS Components

This paper presents a direct digital converter for Wheatstone bridge sensors, which is realized with commercial off-the-shelf components. The power efficiency of the readout is enhanced by embedding the bridge sensor in a second-order continuous-time sigma-delta modulator (CTDeltaSigmaM). By directly digitizing the output signal of a Wheatstone...

aEEG analog front end IC for a neonatal brain development monitoring

Every year number of prematurely born infants grows. Most underdeveloped organ after birth is brain. Therefore its monitoring is very important, especially as it can provide indications about health state in a future, both short and long term. Non invasive method of brain monitoring is EEG recording. However tedious process of system set up and...

A Gm-C Continuous-Time Sigma-Delta Modulator with Improved Linearity

Bridge sensors are widely used for accurate measurement of physical quantities such as temperature, pressure, strain or altitude. Such sensors require a low-noise, high-resolution and accurate readout system with high input impedance. In order to meet these requirements, conventional sensor readout systems use multiple stages which typically...

A 4 GHz Continuous-Time ΔΣ ADC With 70dB DR and -74dBFS THD in 125MHz BW

A 4 GHz third-order continuous-time ΔΣ ADC is presented with a loop filter topology that absorbs the pole caused by the input capacitance of its 4-bit quantizer and also compensates for the excess delay caused by the quantizer's latency. The ADC was implemented in 45 nm-LP CMOS and achieves 70 dB DR and -74 dBFS THD in a 125 MHz BW, while...

Continuous-Time Sigma-Delta Modulation for IF A/D Conversion in Radio Receivers