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In this work, we proposed a novel approach for electrostatic discharge (ESD) noise stress analysis using transfer impedance analysis in a platform for a large-scale integration chip. In the electronic industry an ESD test is widely taken to evaluate the noise immunity of a designed electronic device. In this ESD test, critical hardware damage or functional problems may occur due to temporary electrical...
Capacitance is very important in High Speed I/O power integrity network design. There are different form of capacitors being used on the High Speed I/O Power Integrity Network to ensure the performance of the circuit. In this paper, the effectiveness of MIM capacitance and MOS capacitance is compared. MIM capacitance comes in bulk quantity but placed further away from the HSIO circuits. While MOS...
VHF radiometry is employed in radio astronomy, ionospheric riometry, and in the measurement of signals and noise in communications applications. Accurate techniques for broadband VHF radiometry are well-known, however these techniques assume well-matched broadband antennas and/or receivers having real-valued input impedance over the bandwidth of interest. In this paper we demonstrate through theory...
A 14b 750MS/s 21.1mW current steering digital-to-analog converter (DAC) is presented, which maintains <-168dBm/Hz noise spectral density beyond the Nyquist frequency to minimize TX leakage in SAW-less FDD LTE. A hybrid wideband R-2R LSB segmentation with an impedance attenuator minimizes glitch noise across process and temperature without requiring accurate scaling of switches and switch drivers...
Design and construction of a fast and accurate low-frequency impedance analyzer is presented. Main application of the device is in semi-active noise and vibration damping with piezoceramic actuators in the frequency range from 50 Hz to 5 kHz. Constructed device presented here is based on an ARM microcontroller as a control and communication unit and analog part for synchronous voltage and current...
A wideband CMOS receiver front-end for radio applications operating between 300 MHz and 900 MHz is presented. In order to obtain channel selection with image-rejection and out-of-band interferers attenuation, both low-noise amplifier (LNA) and mixer incorporate a N-Path signal processing technique. The effectiveness of this N-Path filtering is investigated by comparing distinct combinations of clock...
We present a CMOS differential neural amplifier with high input impedance, which topology is inspired by the instrumentation amplifier. The miniaturization of the MEAs goes with an increase of the electrodes impedance and necessitates high input impedance neural amplifiers; otherwise it results in a significant loss of signal and low SNR. The circuit presented here is designed on a 0.35 μm CMOS technology...
This work proposes an inductorless wideband low noise amplifier (LNA) for multistandard applications. This LNA is based on a self-biased complementary current-reuse common source amplifier on the forward path and a source follower on the feedback, using a gyrator-C like effect to create real valued impedance and an inductive effect, achieving wideband input matching. Designed in IBM 130 nm CMOS process,...
This paper presents some of the issues of signal and power integrity in relation with appropriate modeling and simulation methods that are available. The clock signal of a communication protocol is experimentally tested in order to find the rules to improve its signal integrity (SI) along the paths on the printed circuit board (PCB). The signal and power integrity of this PCB are improved using a...
In this paper, the equivalent circuit model of the return paths of common mode electromagnetic interference (EMI) noise currents from the motor drive system (MDS) in hybrid electric vehicle (HEV) is proposed. The proposed model includes three kinds of the return current paths: braided shield of three-phase cable, metallic vehicle body and the parasitic capacitance between the vehicle components. In...
This study investigates how common-mode noise (CMN) is generated and reduced for the differential traces with adjacent ground lines were connected to a ground plane. Based on the resonant effects of ground line and parallel ground planes, the CMN generation mechanism is studied. Based on the analysis of the generation mechanism, a simple design guideline for CMN reduction is proposed for the differential...
In this paper, we proposed a wideband common-mode suppression filter for multi differential signal pairs. The method of the proposed design is utilized by using Defected Ground Structure (DGS) of two quarter-wavelength resonators with the mutual coupling effect to achieve the wideband common-mode suppression. For observing one pair differential signal lines in the frequency domain analysis, the differential-mode...
To demonstrate the impact of the line impedance stabilization network (LISN) on conducted electromagnetic interference (EMI) measurement, an in-circuit impedance extraction method based on inductive coupling approach is developed to extract the common mode (CM) and the differential mode (DM) noise impedances of AC mains, LISN, and switched-mode power supply (SMPS) under operating condition. By treating...
The ground bounce noise (GBN) in high-integrative and high-complexity circuit designs is discussed in this paper. GBN doesn't only transmit its own power and ground plane but also couple to power and ground plane nearby. Therefore, power integrity (PI) will be affected by GBN. I use the segmentation method to cut off the cavity model of PCB. Here, I embed partial electromagnetic bandgap (EBG) structure...
This paper presents a low noise chopper-stabilized instrumentation amplifier (IA) for EEG recording. The current-reuse technology is adopted to reduce noise of the IA and the regulated cascode circuit is used to boost the open-loop gain of the amplifier. A ripple reduction loop (RRL) based on a novel output-resistance-tuning technology is proposed to reduce the intrinsic offset of the IA and reduce...
In this paper, the capability of quarter-wavelength (λ/4) line based bandstop structure for wideband noise isolation in power delivery network (PDN) applications is investigated. Two test boards are implemented using the standard printed circuit board (PCB) fabrication process, and the measured results show extremely wide stopbands from 1 to 40 GHz with 60 to 70 dB isolation.
A novel integration structure of EMI filter based on multilayer ceramic is proposed in this paper. The inductors and capacitors of the new structure can be designed separately, which is advantageous to manufacture. Besides, the Insertion Loss(IL) is usually measured under the condition of the source impedance and load impedance are both 50Ω, which is different from the actual situation. In the process...
To develop common mode filter design, a tri-section quarter wavelength resonator common mode filter is introduced in this paper. The step impedance quarter wavelength resonator in common mode provides capabilities of tunable suppression bands by controlling the 1st and 3rd resonant frequency. In addition, the transmission zero in differential mode due to the difference of phase velocity between common...
The objective of this paper is to propose a coarse model for coupling of switching noise through lightly doped substrates. This could be achieved by assuming a regular placement of substrate contacts in a digital aggressor. Additionally, an approximation of equal ground bounce in an entire digital aggressor is applied. The proposed model is aimed for use as an estimation before placement, i.e. Before...
This paper presents an adaptive supply-resonance (SR) suppression scheme at a product testing stage. Dedicated to each product in different assembly forms, an on-chip power-delivery-network analyzer identifies SR frequency and autotunes notch filter for SR noise suppression. The feasibility has been silicon-proven by a prototype demonstration in 0.18µm CMOS successfully.
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