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An on-chip monitoring technique has realized in place diagnosis of power noise problems. On-chip voltage noise monitor (OCM) circuits are overviewed with some examples of integration in silicon chips. The OCM captures power noise waveforms in a silicon chip and provides the opportunities of diagnosis on unfavorable invisible events within a die. In-band interference of radio-frequency (RF) communication...
The continuous increase of demand for radios navigators makes the use of Automatic Test Equipments compulsory, in order to reduce the testing time and cost. The Telemakos is an Italian test equipment specifically designed to check radio navigator sensitivities. The paper reports the electromagnetic compatibility analysis carried out to meet the noise specifications. The Telemakos test bench is a very...
Tacan is a military omnibearing and distance measurement system, and it is an important system in L-Band. As there are so many equipments work in L-Band, the electromagnetic environment is very complex and EMC problems affect the function of Tacan. In-band narrowband noise is the noise that leads to EMC problem usually. In order to analysis the effect of in-band narrowband noise to Tacan, behavioral...
An automatic method is proposed in this paper which can be used to determine whether a power amplifier exhibit its nonlinear characteristics in electromagnetic compatibility (EMC) susceptibility tests. A general instrument, power amplifier often falls into its saturation region or noise region in EMC tests. This makes the nonlinear characteristic curve of a power amplifier can't be accurately measured...
In This paper three optimization methods of ground design are used to solve EMI problems on the PCB mixed with both analog and digital signals. A model was built to test the surface current, E field, H field and S-parameters of the circuit board to consider the effect of these methods of avoiding EMI and SI problems. Then simulation experiments on a real product are carried out to show the improved...
RF receiver is the key component of receiver. In this paper, the behavioral simulation model of RF receiver is made through the simulation of many parameters, such as gain, noise factor, dynamic range and so on. On the basis of above, the model is validated by experiment. It's helpful to evaluate the receiver EMC quantificationally.
In this paper, the optimized matching circuit between RF SAW (surface acoustic wave) filter output and RF LNA (low noise amplifier) input on the limited PCB (Print Circuit Board) placement space has been gotten by simulation. With the matching circuit, the conducted sensitivity of receiver of the GSM mobile phone is about -109 dBm. Such good sensitivity can decrease desense (sensitivity degradation)...
This paper focuses on the Electromagnetic compatibility (EMC) design for an anti-jamming smart antenna system. The structure of the system is introduced, analyzed and discussed where the electromagnetic interference may arise. And the corresponding countermeasures are presented, which are diverse as the problems, such as metal shielding, grounding, multilayer designing, Printed Circuit Board (PCB)...
We present some performance evaluations of two Power Line Ethernet adapter types and several radiated and conducted emissions measurements. The Power Line Communication provides multiple benefits, but there are some disadvantages of connecting through power line network: high noise and voltage disturbances, signal distortion and variance of impedance with time, interferences. The limits for radiated...
As voltage levels decrease and data rates increase and the electromagnetic environment becomes more noisy for high-speed, differential, I/O data buses in data centers, the electromagnetic susceptibility of these data links increases. Signal integrity and EMC engineers need a way to quantify the risk of data errors given a certain level of external noise and an I/O cablepsilas characteristics. This...
This paper deals with specific and difficult concepts when introducing EMC to engineers and technicians. It is based on the authors experience in presenting introductory short courses. Some concepts are difficult to grasp for first time students as it emphasises phenomena and techniques not necessarily found in other subjects. Five concepts are identified, discussed and possible solutions given for...
Modern electronic equipment of mostly high-speed digital circuitry, switching devices, memories & sensitive semiconductors circuits is very susceptible to electromagnetic interference (EMI). The interference may come via the power supply; signal lines control lines or earth port. It makes good sense to test products to ensure they will work reliably in their intended operating environment. This...
This paper describes the susceptibility measurement studies performed on Intel's 8051 microcontroller based controller circuit against Radio Frequency (RF) signals. Several versions of the 8051 architecture have been mounted on single and multi-layer Printed Circuit Boards (PCB) and the effect of RF noise coupling to their Reset, Clock and Power pins have been observed and analyzed. This study assumes...
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