发明名称 |
Ballast circuit for powering gas discharge lamp |
摘要 |
A ballast for providing a dimmable fluorescent lamp (42) has a potentiometer (46) connected to AC power source (10). The potentiometer (46) is connected to a dimming circuit (44). In response to changes in the resistance of the potentiometer (46), dimming circuit (44) causes the duty cycle of a pulse width modulator (18) to change, thereby dimming the fluorescent lamp (42). A dimming disable circuit (60) disables the dimming circuit (44) when power is initially applied to the ballast (6) so that the lamp (42) will ignite.
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申请公布号 |
US5528111(A) |
申请公布日期 |
1996.06.18 |
申请号 |
US19940348381 |
申请日期 |
1994.12.02 |
申请人 |
MOTOROLA, INC. |
发明人 |
KONOPKA, JOHN G.;LABUDDA, KENNETH D. |
分类号 |
H05B41/392;(IPC1-7):G05F1/00 |
主分类号 |
H05B41/392 |
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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