发明名称 |
Constant current supply for gas discharge lamps - uses relaxation oscillator and is independent of number or length of discharge tubes in circuit |
摘要 |
<p>The current supply is used for illuminated letters, where a constant intensity is required. The circuit consists of a relaxation oscillator, containing a transistor (1), a transformer (4, 5, 10) a timing circuit and a current discriminator. The transistor in the oscillator switches repeatedly from fully conducting to fully cut off and vice versa, with the lengths of time in either state defined by the discriminator and timing circuit respectively. The discriminator detects when a particular current in the transistor has been attained and then forces it into the cut off condition. This defines the current in the transformer secondary circuit (10) which in turn feeds the gas discharge lamp (11) or lamps.</p> |
申请公布号 |
DE2442091(A1) |
申请公布日期 |
1976.03.18 |
申请号 |
DE19742442091 |
申请日期 |
1974.09.03 |
申请人 |
FA. EUGEN HOERNER, 7101 EBERSTADT |
发明人 |
STEINHARDT, HEINZ, 7101 EBERSTADT |
分类号 |
H02M7/5383;H02M7/53846;H02M7/53862;H05B41/282;(IPC1-7):05B41/16 |
主分类号 |
H02M7/5383 |
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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