Umsetzer für Signalkomponenten in einem zusammengesetzten Signal

The appts. (50) has a summing amplifier (Q1) with a bias source (R7,R8,C24) connected to produce separate DC biases at its inputs and output. A circuit node (B) is AC coupled to a luminance signal source (Y1,18), DC coupled via a resistor (R4) to the summing amplifier input and DC coupled via an amp...

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Bibliographic Details
Main Authors SENDELWECK, GENE K, YOST, TOMAS D, GURLEY, THOMAS D
Format Patent
LanguageGerman
Published 22.02.2001
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:The appts. (50) has a summing amplifier (Q1) with a bias source (R7,R8,C24) connected to produce separate DC biases at its inputs and output. A circuit node (B) is AC coupled to a luminance signal source (Y1,18), DC coupled via a resistor (R4) to the summing amplifier input and DC coupled via an amplifier (28) to a luminance signal load (Y3,30). Another circuit node (A) is AC coupled to a chrominance signal (C1,18) source, DC coupled via a resistor (R3) to the summing amplifier input and DC coupled via an amplifier (26) to a chrominance signal load (C3,30). Another amplifier (Q2) DC couples the summing amplifier output to a composite video signal load (E,40). Pref. the summing amplifier and the output amplifier are of unity gain.
Bibliography:Application Number: DE19966010651T