| 发明名称 |
DC to DC converter for line powered modem |
| 摘要 |
A DC to DC converter circuit for use in a telephone line powered modem and operative to convert a voltage derived from the telephone line to operating voltages required for modem operation.
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| 申请公布号 |
US4373117(A) |
申请公布日期 |
1983.02.08 |
| 申请号 |
US19800203109 |
申请日期 |
1980.11.03 |
| 申请人 |
UNIVERSAL DATA SYSTEMS, INC. |
发明人 |
PIERCE, O. LEON |
| 分类号 |
H04M19/08;(IPC1-7):H04M19/00 |
主分类号 |
H04M19/08 |
| 代理机构 |
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代理人 |
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