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All vehicles produced today must be fitted with an On-Board Diagnostic (OBD) interface. With the help of the OBD a data connection through the Controller Area Network (CAN) is realized with the Engine Control Unit (ECU). This control unit is instrumental in optimizing the engine performance. There are many OBD adapters on the market today, ranging from the cheap Do-It-Yourself kind to expensive, professional...
Measurements of the intermodulation products with frequency 2ƒ1−ƒ2 (ƒ1 - transmitter frequency, ƒ2 - antenna frequency) for a W-CDMA professional duplexer filter are presented. It is proved that the 2ƒ1 signal and the intermodulation product are generated in this power BAW filter, despite its careful design.
New frequency domain models for nonlinear loads as one diode and two diodes rectifiers are proposed in this paper. Using these models in the harmonic balance analysis, the simulation time is shortened with about one order of magnitude than that corresponding to the employment of the classical nonlinear models described in the time domain.
This paper presents some aspects regarding the thermographic detection of early-stage cancer that can affect paired organs. The use of a difference thermal field on the surface of the skin near paired organs surfaces is proposed as part of a detection method. The temperature acquisition procedures based on the use of thermographic cameras and temperature sensors are analyzed. The symmetry of the thermal...
A new calibration method for digital to analog converters (DAC) is verified, measuring a set of chips, each containing a 8 bit current steering DAC with a 5+3 segmented architecture. For a sampling frequency of 500MHz and a bandwidth of 5MHz all tested circuits exhibited, after calibration, a Spurious Free Dynamic Range (SFDR) better than 50dB. For a sampling frequency of 1GHz and a bandwidth of 10MHz,...
An 8 bit 1GSPs DAC targeting transmitters for mobile communications terminals has been implemented in 0.18µm TSMC technology. A correction scheme is used for the current sources in order to achieve a SFDR greater than 50dB after layout parasitic extraction in the 10MHz bandwidth. The simulated values for INL/DNL are 0.268 LSB and 0.377 LSB respectively. A 5+3 segmented architecture is used in order...
A new algorithm for the intelligent search in the electrical engineering literature is outlined. It is based on an ontology of this area, built using the terminology of the International Electrotechnical Commission that is structured employing a set of relations between the involved concepts. The main idea is to search using a set of related concepts belonging to this ontology instead of user defined...
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