Modulators – Amplitude modulator – Plural modulation
Reexamination Certificate
2005-07-26
2005-07-26
Vo, Tuyet Thi (Department: 2821)
Modulators
Amplitude modulator
Plural modulation
C332S149000, C332S167000, C332S120000
Reexamination Certificate
active
06922114
ABSTRACT:
The operating method is based on the simultaneous application of FM and AM, and is distinguished by passing through three operating states, specifically a warm-up phase, an impressing phase and the continuous operation.In the warm-up phase, the f002_hor is selected as fundamental frequency of the AM, or an AM is dispensed with. The impressing phase is distinguished by a temporally changing AM deviating from the conditions of the continuous operation and having an AM degree different from zero. In the continuous operation, constant conditions of the AM in the case of which the f002_hor is reached as fundamental frequency of the AM, and the AM degree is at 20 to 25% are characteristic.
REFERENCES:
patent: 6184633 (2001-02-01), Kramer
patent: 6400100 (2002-06-01), Kramer
patent: 6437517 (2002-08-01), Kramer
patent: 6788077 (2004-09-01), Hamdan
patent: 2002/0041165 (2002-04-01), Cammack
patent: WO 02/09480 (2002-01-01), None
European Patent Office Search Report (referencing all documents listed above) dated Mar. 23, 2004.
Kästle Herbert
Stockwald Klaus
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Vo Tuyet Thi
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