Card type semiconductor memory device for storing analog image signals in separate analog memory card units
US6151235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1999 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10159
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a card type semiconductor memory device, a plurality of memory chips each of which stores, as analog values, a still image formed from a color interleaved analog image signal using analog nonvolatile semiconductor memories for writing/reading color interleaved analog image signals having analog luminance information of predetermined colors in units of pixels, and a connector for connecting a number of signal lines for transferring various signals between the memory chips and a host device to the host device side are arranged on a card-like substrate. An analog signal line group from each memory chip is separated from a digital signal line group on the substrate via a separation strip formed from a wide conductive pattern, and concentratedly laid out at positions of the connector, which are separated from the digital signal line group. In each memory chip, terminals for analog signals are concentrated to a terminal array provided on a predetermined side of the chip package. The memory chips are parallelly arranged in a direction in which the sides are close to each other on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.