发明名称 |
Electron beam control system. |
摘要 |
<p>A high speed focus control circuit for an electron beam projection system. The circuit includes a conventional digital to analog converter, comprising a register for storing an n-bit digital value, and n current drivers, each of which provides a current which is proportional to the associated bit weighted value. Rather than summing the currents from all n current drivers and driving a single focus coil, each current driver is connected to one of n individual coils, wound on a common bobbin. This reduces circuit capacitance and permits higher switching speed.</p> |
申请公布号 |
EP0166399(A2) |
申请公布日期 |
1986.01.02 |
申请号 |
EP19850107735 |
申请日期 |
1985.06.24 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HO, CECIL TZECHOR;WILMAN, JOHN GILBERT |
分类号 |
H01J37/147;H01J37/305;H01L21/027;H04N3/26;(IPC1-7):H01J37/147 |
主分类号 |
H01J37/147 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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