Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1995-08-28
1996-05-28
Pascal, Robert
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
315 77, 315307, H05B 3702
Patent
active
055214495
ABSTRACT:
In accordance with the present invention, noise suppression circuitry is described for reducing noise, AM band noise in particular, radiated from a strobed load driver circuit. The load driver circuit includes a low-voltage latch circuit for latching data relating to the load to a plurality of high-voltage load driver circuits, each connected to a source of high-voltage. The noise suppression circuitry is operable to receive a data strobe signal from a signal source, such as a microprocessor, and to decrease the high voltage to the plurality of high-voltage load driver circuits at a predetermined rate. When the voltage has decreased to a predetermined level, the latch circuit is provided with a data strobe signal to thereby latch the data to the high-voltage load driver circuits under low voltage conditions, thus significantly reducing the AM band noise radiated from the strobed load driver circuit.
REFERENCES:
patent: 4968917 (1990-11-01), Harris
patent: 5365146 (1994-11-01), Kadwell
patent: 5477108 (1995-12-01), Kadwell
Delco Electronics Corporation
Funke Jimmy L.
Pascal Robert
Shingleton Michael B.
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