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The paper presents a 24 V chopper offset-stabilized operational amplifier with symmetrical RC notch filters, having a 4–24 V supply range, and being realized using a 0.25 ßm BCD process. The amplifier has a typical offset voltage of 1.2 μV, a minimum PSRR of 128 dB, a minimum CMRR of 120 dB, a minimum open-loop gain of 134dB, a noise PSD of 30 nV/√Hz, 1.8 MHz unity gain bandwidth, and THD + noise...
This paper reports a high performance capacitive accelerometer with a noise level of 350ng/√Hz, bandwidth of 4.5kHz, and 135 dB open loop dynamic range at 1Hz bandwidth. The accelerometer was designed in a mode-tuning structural platform. This platform is developed to address the issue between sensitivity and bandwidth for the low-noise capacitive in-plane accelerometers. The platform proposes to...
Analog systems, where good and stable supply plays an important role in total system performance, need highly accurate, clean and reliable low dropout linear regulators (LDOs). High performance and low area are also important in voltage reference circuits for achieving smallest cost and best in the industry Analog-to-Digital (A/D) and Digital-to-Analog (D/A) conversion. This paper describes a smart...
In this paper, a new trend in the design of a microwave amplifier is proposed. The pivot element in the design is to numerically investigate the the relation between VSWR with different frequencies, reflection coefficients, and noise figures. Multiple curves relating the VSWR with both the reflection coefficient and the transducer gain facilitates the location of a starting point for the optimization...
This paper discusses the signal to noise ratio (SNR) improvement at the antenna receiver system output using non-Foster matching. High mismatch loss in an antenna reduces the external noise power below the internal noise floor which results in a lower SNR than expected appearing at the input of the receiver. Non-Foster matching can minimize the mismatch loss but also adds its own noise to the receiver...
Developing a precise understanding of the dynamic behavior of time series is crucial for the success of forecasting techniques. We introduce a novel communication-theoretic framework for modeling and forecasting time series. In particular, the observed time series is modeled as the output of a noisy communication system with the input as the future values of time series. We use a data-driven probabilistic...
Phasor measurement unit (PMU) performance depends on the performance of the PMU’s analog input section and the limitations of its DSP algorithms. For the different PMU performance requirements established in the standards, the relative importance of these two factors varies significantly. For steady-state frequency and rate-of-change-of-frequency (ROCOF) measurements, this paper shows that estimation...
The Atacama Millimeter/Sub-millimeter Array (ALMA) is one of the most powerful telescopes built to date. All the receivers that cover the 10 frequency bands (35–950 GHz) in ALMA must comply with stringent requirements in order to perform astronomical observations, in particular, low noise temperature and high aperture efficiency. The ALMA band 1 receiver optics (35–52 GHz) are composed of a corrugated...
In this paper, a measurement procedure to capture properly the electromagnetic fields generated by radiated transient interferences is described. Measuring this type of impulsive noise out of the measurements defined at the EMC standards is essential to acquire the main parameters of the interferences. In order to protect the digital communication systems against radiated transients, the essential...
A Mixed-signal bio-potential signal interface is presented. It uses a feedback loop that acts like an adaptive notch filter to increase system immunity to power line interference. The proposed feedback loop automatically detects the frequency of power line interference without the need for a phase locked loop, it also exploits an optimized technique for frequency generation that minimizes digital...
This paper investigates an inductorless technique for bandwidth extension which uses local positive feedback in an optical receiver front-end based on an inverter-based transimpedance amplifier and Cherry-Hooper post-amplifiers. Small feedback inverters create negative resistance that boosts the output resistance of inverter-based amplifiers. Compared to a reference design having a TIA and a three-stage...
A 100 Gb/s transimpedance amplifier (TIA) for next generation optical communication adopts a diode-connected input-resistance-reduction architecture and is designed in 32 nm CMOS SOI technology. The proposed TIA design is based on a gm-boosted common-gate amplifier with a diode-connected current source and incorporates a single-to-differential signal conversion architecture. The input resistance of...
A bandpass delta-sigma modulator with a widely tunable center frequency range for direct digitization of IF or RF signals can be a key building block for highly digitized radio receivers. The performance of the bandpass modulator is highly dependent on the accuracy of the noise transfer function zero locations in the presence of process spread. An automatic calibration method is proposed to calibrate...
To build a stable power distribution network for high-speed digital systems, simultaneous switching noise (SSN) should be sufficiently suppressed in multi-layer PCBs. In this paper, novel uni-planar compact electromagnetic bandgap (UC-EBG) structures with triangular-type unit cells designed on power/ground planes are proposed for the ultra-broadband suppression of SSN. The effect of the structural...
This paper presents instrumentations for high throughput single ion channel recording array used for proteomics. The instrumentations incorporates two-stage amplifier using shared operational transconductance amplifier structure. The proposed sensor frontend reduces power consumption and area of circuit without any performance degradations in terms of bandwidth and noise. Two compact, low noise, low...
Track-density scaling is projected to be the key driver for increasing the areal density and cartridge capacity in future tape storage systems. To achieve very high track densities, positioning control down to the nanometer scale will be essential. In this paper, the positioning accuracy of the tape track-following control system is investigated and advances in several elements of the system are presented...
In this paper, we propose a new paradigm for human-robot collaboration. In this paradigm, the collaboration properly takes advantage of the superior visual performance of the humans and the field exploration capabilities of robots, allowing the robot to only ask humans for help when needed. More specifically, we consider a robotic field exploration and classification task with limited communications...
The recent research is trending to develop robust solutions for controlling nonlinear systems with uncertain dynamics. This paper employs a novel approach of active disturbance rejection control (ADRC) based on extended state observer (ESO) to solve the nonlinear control problem with uncertain dynamics. To evaluate the actual performance of the ADRC, the classical nonlinear system of cargo ship steering...
We consider the problem of distributed detection involving multiple sensor nodes to jointly detect the presence of an unknown signal. To circumvent power/bandwidth constraints, a multilevel quantizer is employed in each sensor to quantize the original observation. The quantized data are transmitted through distortion channels to a fusion center where a generalized likelihood ratio test (GLRT) detector...
CDMA-based technologies deserve assiduous analysis and evaluation. We study the performance, at call-level, of a CDMA cell with interference cancellation capabilities, while assuming that the cell accommodates different service-classes of batched Poisson arriving calls. The partial batch blocking discipline is applied for Call Admission Control (CAC). To guarantee certain Quality of Service (QoS)...
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