Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"common mode rejection"”.
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An investigation of series LC resonant circuits within a sleeve balun to achieve wideband operation
… bazooka balun or quarter-wavelength balun, are commonly used in antenna measurements. In general, baluns do perform well, but their performance is band-limited. Hence, for wider frequency bands, multiple baluns with different operating frequencies have to be used. This presents a major problem, …
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Towards Ultra-High Resolution Mode-localised MEMS Sensors
Sensors employing mode localisation in weakly coupled resonators have been increasingly viewed as an alternative to resonant frequency shift based sensing. Much theory has been proposed highlighting the advantages of these sensors including the increased sensitivity and the promise of common mode …
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An automated bench testing system for direct current parameters of instrumentation amplifiers
… currents, input offset current, output swing, common mode rejection, power supply rejection, quiescent current and gain error. The system is developed on the PXI platform and consists of measurement and signal generating hardware modules, a Windows-based computer, a resource printed circuit …
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Real-time non-intrusive reed valve measurement and analysis
… turn has provided the opportunity to improve the modelling of reed valves through the development of the forcing function. The sensor uses active infra-red to achieve non-intrusive position measurement and can be attached in close proximity to the reed valve, enabling high common mode rejection of …
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Design and Implementation of Mode Localised Resonant MEMS Oscillators for Gravimetric Sensing
… This thesis investigates the potential of mode localisation in MEMS devices for sensing ultrafine particles as an approach towards future sensor technologies for gravimetric sensing that could eventually be deployed as part of the emerging Internet-of-Things (IoT) paradigm. Furthermore, …
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High performance amplifier topologies implemented with a micro-machined vibrating capacitor
… low-leakage inputs and a very wide input common mode voltage range. The up-modulation provides a means for achieving a low input referred offset voltage and low-noise via the use of correlated double sampling or chopper stabilization. At the system level, this amplifier consists of two …
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Synthesis, design, and fabrication techniques for reconfigurable microwave and millimeter-wave filters
… variation of filters using low-loss evanescent-mode cavity resonators is presented, and this technique is used to realize up to 90% reduction of bandwidth variation in octave-tunable bandstop filters.</p> <p>Lastly, a new differential coupling structure for evanescent-mode cavity resonators is …
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Amplifier and data converter techniques for low power sensor interfaces
… stage followed by a 0.8V-supply folded-cascode common-source stage. The high input-stage current needed to reduce the input-referred noise is drawn from the 0.2V supply, significantly reducing power consumption. The 0.8V stage provides high gain and signal swing, improving linearity. Biasing and …
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Novel approaches in current-feedback operational amplifier design
… Operational Amplifier (CFOA) with a good Common-Mode Rejection Ratio (CMRR), suitable for radio frequency (RF) applications. This research focused on investigation of the established CFOA with the emphases of improving CMRR, bandwidth, Voltage-Offset and Slew-rate performance. The majority …
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Modular High-DR Artifact-Resilient Wearable EEG Headset with Distributed Pulse-Based Feature Extraction and Multiplier-Less Neuromorphic Boosted Seizure Detection
… an AE-specific-boosted distributed feed-forward common-mode rejection (CMR) enhancement method achieving >80dB CMRR in the presence of 1MΩ AE-to-AE input impedance (Zin) mismatch (89dB without mismatch), and 6) an AE-specific electrode-tissue impedance (ETI)-correlation-based circuit for motion …
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LOW POWER AND HIGH SIGNAL TO NOISE RATIO BIO-MEDICAL AFE DESIGN TECHNIQUES
… Amplifier (IA), which will have a better Common Mode rejection ratio (CMRR). The main function of the AFE is to convert the weak electrical Signal into large signals whose amplitude is large enough for an Analog Digital Converter (ADC) to detect without having any errors. A Variable Gain …
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A Reliable CMOS Receiver for Power Line Communications in Integrated Circuits
… term of the data signal. Since the DC voltage is common for both inputs of the differential amplifier, it is removed from the data signal through the common mode rejection of the differential amplifier. Therefore, the signal extractor can mitigate supply voltage fluctuations and droops. The last …
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Surface plasmons for enhanced metal-semiconductor-metal photodetectors
… (B-MSM-PD) structure and we measure a common mode rejection ratio (CMRR) value less than 25 dB at 830nm wavelength. This efficient CMRR value makes our B-MSM-PD structure suitable for ultra-high-speed optical telecommunication systems. In addition, this work paves the way for the …
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Magnetoelectric Laminates with Novel Properties for Sensor, Transmitter, and Gyrator Applications
… has determined that both passive and active mode ME sensors are affected by vibrational noise in the open environment. Therefore, as described herein, an ME gradiometer consisting of a pair of ME sensors working under H-field modulation (active mode) was developed to address the issue of …
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Zesilovač pro tenzometry
Tato práce popisuje způsoby zesílení signálu z tenzometrického mostu. Jsou zde uvedeny jednotlivé zapojení zesilovačů a popsány jejich vlastnosti. Dále je zde uveden výpočet chyby zesilovače pro různé teploty prostředí. V další části jsou navrženy jednotlivé varianty zapojení zesilovačů pro …