Built-in capacitor type power feed device to power pins of electrical component
A built-in capacitor type power feed device for an electrical component which solves the problems of the reduction in the noise margin of the power supply system accompanying the lower drive voltages of electrical components and the noise between the power supply and ground accompanying simultaneous switching waveforms, provided with a power supply for supplying power, a printed circuit board including a signal line pattern, a power bar having conductive projections provided in shapes and at positions corresponding to the shapes and positions of electrodes of the electrical component and provided outside of the printed circuit board, a ground bar provided outside of the printed circuit board, and a high dielectric layer provided at a part corresponding to the electrical component between the power bar and the ground bar, power from the power supply being fed to electrodes of the electrical component through the power bar and the ground bar.
1. A built-in capacitor type power feed device for an electrical component, comprising:
a power supply supplying power;
a printed circuit board including a signal line pattern;
a power bar having a main body of substantially the same shape as said electrical component and having conductive projections provided at positions corresponding to positions of electrodes of said electrical component, said power bar being provided outside of said printed circuit board;
a ground bar provided outside of said printed circuit board and separated from said printed circuit board; and
a high dielectric layer provided at a part corresponding to said electrical component between said power bar and said ground bar, power from said power supply being fed to electrodes of said electrical component through said power bar and said ground bar, wherein
said electrical component comprises ground use ground pins and power pins,
said power bar is provided with holes provided at positions corresponding to said ground pins and insulated at their surroundings from said power bar and first conductive projections provided at positions corresponding to said power pins,
said ground bar is provided with second conductive projections fitting into said holes,
said first conductive projections are connected to said power pins of said electrical component through vias in said printed circuit board, and
said second conductive projections are connected to said ground pins of said electrical component through other vias in said printed circuit board.
2. A built-in capacitor type power feed device for an electrical component, comprising:
a power supply supplying power;
a printed circuit board including a signal line pattern;
a power bar having a main body of substantially the same shape as said electrical component and having conductive projections provided at positions corresponding to positions of electrodes of said electrical component, said power bar being provided outside of said printed circuit board;
a ground bar provided outside of said printed circuit board and separated from said printed circuit board; and
a high dielectric layer provided at a part corresponding to said electrical component between said power bar and said ground bar, power from said power supply being fed to electrodes of said electrical component through said power bar and said ground bar, wherein
said electrical component comprises ground use ground pins and power pins,
said ground bar is provided with first conductive projections provided at positions corresponding to said ground pins and holes provided at positions corresponding to said power pins and insulated at their surroundings from said ground bar,
said power bar provided with second conductive projections fitting into said holes,
said first conductive projections are connected to said ground pins of said electrical component through vias in said printed circuit board, and
said second conductive projections are connected to said power pins of said electrical component through other vias in said printed circuit board.
3. A built-in capacitor type power feed device for an electrical component, comprising:
a power supply supplying power;
a printed circuit board including a signal line pattern;
a power bar having a main body of substantially the same shape as said electrical component and having conductive projections provided at positions corresponding to positions of electrodes of said electrical component, said power bar being provided outside of said printed circuit board;
a ground bar provided outside of said printed circuit board and separated from said printed circuit board; and
a high dielectric layer provided at a part corresponding to said electrical component between said power bar and said ground bar, power from said power supply being fed to electrodes of said electrical component through said power bar and said ground bar,
wherein said power bar and said ground bar are provided between said printed circuit board and said electrical component, and said power bar and said ground bar are directly connected to said electrical component without going through vias of said printed circuit board.
4. A built-in capacitor type power feed device for an electrical component, comprising:
a power supply supplying power;
a printed circuit board including a signal line pattern;
a power bar having a main body of substantially the same shape as said electrical component and having conductive projections provided at positions corresponding to positions of electrodes of said electrical component, said power bar being provided outside of said printed circuit board;
a ground bar provided outside of said printed circuit board and separated from said printed circuit board; and
a high dielectric layer provided at a part corresponding to said electrical component between said power bar and said ground bar, power from said power supply being fed to electrodes of said electrical component through said power bar and said ground bar,
wherein said power bar and said ground bar are provided between said printed circuit board and said electrical component, the power pins and ground pins of said electrical component are directly connected to said power bar and said ground bar without going through vias of said printed circuit board, and said power bar and said ground bar are also connected to vias of said printed circuit board.