Deflection circuit having a controllable sawtooth generator

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5250879
SERIAL NO

07958594

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ATTORNEY / AGENT: (SPONSORED)

Importance

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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.COURBEVOIE40

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)
* 4686432 Vertical deflection circuit for electron beams in picture tubes 16 1985
 
RCA Licensing Corporation (1)
* 4737691 Television apparatus for generating a phase modulated deflection current 8 1986
 
TEKTRONIX, INC. (1)
* 4490653 Deflection systems and ramp generators therefor 22 1982
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
THOMSON MULTIMEDIA (2)
* 5672942 Sawtooth generator controlled in a gain control feedback loop 1 1996
* 5945792 Sawtooth generator with gain control arrangement 1 1997
 
Sony Electronics Inc. (2)
* 6028640 Current source and threshold voltage generation method and apparatus for HHK video circuit 7 1997
* 6018370 Current source and threshold voltage generation method and apparatus for HHK video circuit 2 1997
 
Camoplast Solideal Inc. (1)
* 2011/0074,210 Noiseless Elastomeric Tracks For Tracked Vehicles 0 2010
 
Thomson Consumer Electronics, Inc. (2)
* 5587631 Resistor-matched deflection apparatus for a video display 3 1992
* 5703445 Sawtooth generator with disturbance signal rejection for a deflection apparatus 1 1996
 
SGS-Thomson Microelectronics S.A. (1)
* 5889421 Device for detecting the locking of an automatic gain control circuit 1 1997
 
INTERSIL AMERICAS LLC (1)
* 6930520 High bandwidth feed-forward oscillator 14 2004
* Cited By Examiner