H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 7/20 (2006.01) H05K 1/02 (2006.01) H05K 3/00 (2006.01) H05K 9/00 (2006.01) H05K 3/42 (2006.01)
Patent
CA 2304528
A method and a system for measuring the mechanical vibrations of an object. In order to simplify the electronic circuit necessary for the measurement chain and to reduce its costs, this method and this system are characterized in that they comprise the processing of an input signal, representative of an acceleration or of a velocity related to a mechanical vibration of said object, said input signal having a frequency spectrum comprising a so-called low frequency band, situated below a so-called transition frequency, and a so-called high frequency band, situated above said transition frequency, said method and system carrying out said processing of said input signal by means of an electronic circuit for producing an output signal which, in said low frequency band, corresponds to the mathematical integral over the time of said input signal, and, in said high frequency band, corresponds to said input signal.
La présente invention concerne une plage thermo et électrocondutrice disposée entre une carte de circuit électronique (PCB) et un puits de chaleur, dans une station de base de téléphone cellulaire. La plage comprend au moins un orifice qui recouvre une ou plusieurs traversées de signal sur un plan de masse de la PCB. Les ouvertures de la plage sont plus grandes que chacune des traversées sous-jacentes de signal de façon à isoler électriquement, du matériau conducteur de la plage et du puits de chaleur, les traversées de signal. La plage permet au traversées mises à la à la masse sur un plan de masse de PCB de mettre le puits de chaleur à la masse.
Ericsson Inc.
Marks & Clerk
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