Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Memory module and an IC card










Image Number 5 for United States Patent #5838549.

In semiconductor modules having a plurality of semiconductor devices mounted on a multilayer printed circuit boards as the processing speed increases, a short circuit current flowing through CMOS devices in the semiconductor devices during operation can cause noise because of ground inductance or power supply inductance. This noise can result in erroneous operations. To solve this problem, the power supply layer or grand layer that is connected to either the power supply terminal Vcc or the ground terminal Gnd of each semiconductor memory, which is located farther from the connection terminals, is arranged closer to the semiconductor memories with this arrangement, the short circuit current flowing through the semiconductor memories is more strongly magnetically coupled with the power supply layer or ground layer arranged close to them. Thus, it is possible to reduce the effective inductance. This, in turn, reduces noise, making it possible to provide a semiconductor module with an increased processing speed.








 
 
  Recently Added Patents
Antibody recognizing turn structure in amyloid .beta.
Vehicle grille
Frame syncrhonization in orthogonal frequency-division multiplexing systems
Touch screen guitar
Semiconductor memory device and manufacturing method thereof
Power supply architecture system designer
Motorized home appliance door
  Randomly Featured Patents
Stack feeding aeration device and method
Process for soil decontamination by oxidation and vacuum extraction
Modular filter system
Device for feeding a wire electrode
Production of epoxy compounds from olefinic compounds
Syntheses of trisulfonated phthalocyanines and their derivatatives using boron (111) subphthalocyanines as intermediates
Mechanically actuated tip seals for scroll apparatus and scroll apparatus embodying the same
Oven door latch
Insulated conductor
Motor-driven surgical cutting fastening instrument with tactile position feedback