|
|
|
|
|
|
|
|
| ( 1 of 1 ) |
| United States Patent | 5,581,279 |
| Chang , et al. | December 3, 1996 |
| **Please see images for: ( Certificate of Correction ) ** |
The "chip set" of a graphics adapter interface card is reduced to a monolithic integrated circuit that includes a programmable analog clock circuit for producing a video memory clock and a video dot clock. A digital graphics adapter controller is responsive to the video memory clock and the video dot clock to produce a video information stream. A random-access memory is responsive to the video information stream to produce a video display information stream, and a digital-to-analog converter is responsive to the video display information stream to convert the video display information stream to analog signals for application to a video display device.
| Inventors: | Chang; Chieh (Belmont, CA), Lee; Man S. (San Mateo, CA), Lushtak; Alex (Los Altos, CA) |
|---|---|
| Assignee: |
Cirrus Logic, Inc.
(Fremont,
CA)
|
| Family ID: | 25208026 |
| Appl. No.: | 08/147,456 |
| Filed: | November 5, 1993 |
| Application Number | Filing Date | Patent Number | Issue Date | ||
|---|---|---|---|---|---|
| 811944 | Dec 23, 1991 | ||||
| Current U.S. Class: | 345/519 |
| Current CPC Class: | G09G 5/363 (20130101); G09G 5/18 (20130101) |
| Current International Class: | G09G 5/18 (20060101); G09G 5/36 (20060101); G09G 5/39 (20060101); G09G 005/36 () |
| Field of Search: | ;345/132,190,201,185 ;395/325,400,164,425 ;357/45,201 ;257/203 ;328/63,104 |
| 4626839 | December 1986 | O'Malley |
| 4633441 | December 1986 | Ishimoto |
| 4727363 | February 1988 | Ishii |
| 4811007 | March 1989 | Schreiber |
| 4811240 | March 1989 | Ballou et al. |
| 4851892 | July 1989 | Anderson et al. |
| 4858175 | August 1989 | Sato |
| 4894646 | January 1990 | Ryman |
| 4918436 | April 1990 | Johary |
| 4978633 | December 1990 | Seefeldt et al. |
| 5036216 | July 1991 | Hohmann et al. |
| 5039884 | August 1991 | Hara |
| 5043713 | August 1991 | Katsura et al. |
| 5063429 | November 1991 | Crafts |
| 5095280 | March 1992 | Wunner et al. |
| 5105179 | April 1992 | Smith |
| 5345554 | September 1994 | Lippincott et al. |
| WO/9115841 | Oct 1991 | WO | |||
| WO91/15841 | Oct 1991 | WO | |||
"PEGA2" User's Guide, pp. 2-61, 1986. . "Brooktree" pp. 1.2, (4.7)-(4.13) and (4.57)-(4.63), 1991. . "Brooktree" 1989. . "inmos" Nov. 1988. . Acumos VGA Video Controller AVGA1 data sheet, Sep. 6, 1990.. |
|
|