| 发明名称 |
Parallel port pass-through digital to analog converter |
| 摘要 |
A digital-to-analog (D/A) converter for connecting to a computer's parallel port, while allowing another peripheral to be attached to, and use, the same port. The D/A converter requires no external power supply. The D/A converter may be used to produce speech, music or other sounds.
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| 申请公布号 |
US4812847(A) |
申请公布日期 |
1989.03.14 |
| 申请号 |
US19870104196 |
申请日期 |
1987.10.02 |
| 申请人 |
STEWART, JOHN L.;STEWART, BRADLEY C. |
发明人 |
STEWART, JOHN L.;STEWART, BRADLEY C. |
| 分类号 |
G06F3/05;H03M1/00;(IPC1-7):H03M1/78 |
主分类号 |
G06F3/05 |
| 代理机构 |
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