Television – Television transmitter circuitry
Patent
1997-02-14
1998-09-22
Flynn, Nathan S.
Television
Television transmitter circuitry
348724, H04N 538
Patent
active
058122214
ABSTRACT:
A UHF transmitter for digital TV signals includes, for example, twelve silicon carbide transistor RF output power amplifier panels driven in parallel by two silicon carbide amplifier driver panels and where each panel is comprised of two modules each further including a 180.degree. signal splitter, a pair of quadraphase signal splitters and combiners, a 180.degree. signal combiner, and five RF amplifier pallets which themselves are comprised of two silicon carbide transistors located on a common flange and operated in push-pull relationship so as to suppress even order distortion products and reduce sensitivity to ground currents. A monitoring system, including a touch screen control display and control panel senses the status of all assemblies so as to allow an operator to control the transmitter and inquire about the status of the various components and power supplies, and to replace one or more units as required without the need for turning the transmitter off.
REFERENCES:
patent: 5291290 (1994-03-01), Vaughan et al.
patent: 5291291 (1994-03-01), Eilers
"ATSC Digital Television Standard" Report, Advanced Television Systems Committee, Sep., 1995, pp. 46-67.
Davis Carlton Daniel
Hawkins Jack Jerome
Long Robert Kent
Flynn Nathan S.
Northrop Grumman Corporation
Sutcliff Walter G.
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