Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1993-01-27
1994-11-15
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
174 51, 174255, 174 35R, 361760, 361795, 361792, 361793, 361809, 361818, 439 47, 439109, 439608, H05K 111, H01R 13648
Patent
active
053654072
ABSTRACT:
A DC power supply device for use with a video tape recorder with a built-in camera has a plurality of power supply blocks for supplying a plurality of voltages, each of the power supply blocks being composed of a switching circuit for being supplied with a DC voltage and a smoothing circuit connected to an output terminal of the switching circuit. The power supply blocks are mounted on a multilayer circuit board which includes a layer of a ground pattern with an electric conductor extending substantially fully thereover, the ground pattern being separated into a plurality of ground pattern portions by a plurality of recesses defined therein, the power supply blocks having respective ground terminals connected to the ground pattern portions, respectively. The multilayer circuit board may comprise at least a layer for mounting electronic parts thereon, a layer having a signal line pattern thereon, a layer having a power supply line pattern thereon, in addition to the layer of the ground pattern, and a plurality of insulating layers electrically separating and mechanically joining the layers.
REFERENCES:
patent: 3162931 (1964-12-01), Gessner
patent: 3484697 (1969-12-01), Abend
patent: 4675789 (1987-06-01), Kuwabara et al.
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patent: 4799128 (1989-01-01), Chen
patent: 4984132 (1991-01-01), Sakurai et al.
patent: 5073840 (1991-12-01), Coors
"Multiple LSI Silicon Chip Modules With Power Buses Composed of Laminated Silicon Sheets With Metallized Upper and Lower Surfaces" IBM Technical Disclosure Bulletin vol. 22 No. 8A Jan. 1980.
Hashimoto Kazuo
Nakabayashi Toshiya
Nakayoshi Hirokazu
Kananen Ronald P.
Picard Leo P.
Sony Corporation
Sparks Donald A.
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