US Patent No: 5,250,879

Number of patents in Portfolio can not be more than 2000

Deflection circuit having a controllable sawtooth generator

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a vertical sawtooth generator of a vertical deflection circuit, a first comparator generates an output signal when a retrace portion of a sawtooth signal is at a first magnitude to initiate a vertical trace portion of the sawtooth signal. An amplifier responsive to the sawtooth signal generates a feedback current at a time that occurs more than one-half of the length of vertical trace portion after vertical trace is initiated. The feedback current is coupled to a capacitor to develop a capacitor voltage. The capacitor voltage is applied via a voltage-to-current converter to an integrating capacitor to develop in the integrating capacitor the trace portion of the sawtooth signal.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THOMSON CONSUMER ELECTRONICS S.A.COURBEVOIE53

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koblitz, Kark R Meylan, FR 1 8

Cited Art Landscape

Patent Info (Count) # Cites Year
 
DEUTSCHE THOMSON-BRANDT GMBH (1)
4,686,432 Vertical deflection circuit for electron beams in picture tubes 16 1985
 
PHILLIPS COMMUNCIATION & SECURITY (1)
4,277,729 Simplified vertical deflection circuit 12 1979
 
RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE (1)
4,737,691 Television apparatus for generating a phase modulated deflection current 8 1986
 
TEKTRONIX, INC. (1)
4,490,653 Deflection systems and ramp generators therefor 22 1982
 
Thomson-CSF (1)
4,314,183 Sawtooth-generating circuit 7 1979

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SONY ELECTRONICS INC. (2)
6,028,640 Current source and threshold voltage generation method and apparatus for HHK video circuit 5 1997
6,018,370 Current source and threshold voltage generation method and apparatus for HHK video circuit 2 1997
 
THOMSON CONSUMER ELECTRONICS, INC. (2)
5,587,631 Resistor-matched deflection apparatus for a video display 3 1992
5,703,445 Sawtooth generator with disturbance signal rejection for a deflection apparatus 1 1996
 
THOMSON MULTIMEDIA (2)
5,672,942 Sawtooth generator controlled in a gain control feedback loop 1 1996
5,945,792 Sawtooth generator with gain control arrangement 1 1997
 
INTERSIL AMERICAS INC. (1)
6,930,520 High bandwidth feed-forward oscillator 12 2004
 
SGS-Thomson Microelectronics S.A. (1)
5,889,421 Device for detecting the locking of an automatic gain control circuit 1 1997