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7443106 |
Circuit with switch-off device for the operation of light sources
Circuit with a switch-off device for the operation of light sources The invention relates to a circuit with a switch-off device for the operation of light sources (Lp), have the following...
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6573669 |
Cathode ray tube driver circuit with frequency compensation without providing a leakage path for cathode current
A circuit for driving a cathode ray tube (CRT) with frequency compensation. Specifically, the present invention discloses a CRT driver circuit comprising a cascode gain stage for amplifying an...
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6495978 |
CRT display device and cutoff adjustment method
A cutoff adjustment method of a CRT using a Hi-Gm tube is proposed as well as a problem that luminance of a display screen is changed by a fluctuation of a Gm voltage to be applied to a Gm...
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6226037 |
AKB interface circuit for kine driver IC
An AKB interface apparatus in a display system (10), includes a video signal processing IC (12) having outputs coupled via respective kinescope driver ICs (18,20,22) to respective kinescope...
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5998943 |
External magnetic field correction device and CRT display device
An external magnetic field correction device capable of preventing malfunctions of the external magnetic field correction device due to operation of a degaussing circuit by judging that an...
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5894327 |
Video display system with AKB responsive screen grid supply
Video signals to be displayed are applied via a video driver amplifier to the cathode electrode of a kinescope. A beam current sensor, also coupled to the cathode electrode, provides a beam current...
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5614793 |
Deflection circuit responsive to differential sawtooth signals
A pair of current sources, each having a high output impedance, are coupled to a pair of first and second inputs of a differential input stage of a vertical deflection amplifier. An output of the...
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5410223 |
Display device including a black level setting circuit
Known display devices include a video signal processing circuit with a black level setting circuit. This black level setting circuit measures the black level of the video signal, for example,...
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5353187 |
Safety circuits for a television receiver
A first transformer is coupled to a deflection yoke and coupled to a derived secondary voltage source for driving a load, for example, for generating an ultor voltage. An on/off switch is...
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5266872 |
Device for the dual loop servo-control of the cut-off voltage of a cathode-ray tube
The disclosure relates to cathode-ray tubes that have to be used at a low level of luminance. The cut-off voltage of the tube is modified by using two servo-control loops, the first one as a...
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5198731 |
Linearization of vertical reference ramp
A vertical deflection ramp voltage is generated by the charge and discharge of a resistor capacitor combination. The voltage ramp is coupled to an amplifier which drives a current through a...
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5087863 |
Feedback arrangement in a deflection circuit
A driver stage of a horizontal deflection output transistor includes a transformer having a first winding coupled to a collector of a second, driver transistor responsive to an input signal at a...
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5010280 |
Vertical deflection circuit for CRT display device
A vertical deflection circuit for a CRT display device comprises a first negative feedback circuit for detecting a vertical deflection current flowing through a vertical deflection coil feeding it...
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4956586 |
Frequency independent CRT horizontal sweep generator having current feedback and improved pincushion correction circuitry
A signal generator which generates an yoke signal for application to a horizontal yoke of a cathode ray tube (CRT) is presented. The signal generator receives a dc signal which indicates the width...
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4692670 |
Vertical deflection circuit
A vertical deflection circuit for a CRT tube, with a so-called Mirror integration circuit, has an integration arrangement with a resistor and a capacitor, and a first amplifier for amplifying...
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4584503 |
Phase correction arrangement for deflection circuit
A circuit for use in a video display apparatus corrects raster shift due to beam current variations. A horizontal retrace related pulse is applied to the ramp generator for the horizontal...
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4581563 |
Variable format controls CRT raster
Feedback loops monitor the vertical and horizontal deflection yoke drive voltages of the CRT and separately compare each potential with a voltage which represents full screen deflection. Error...
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4477749 |
Circuit for generating a sawtooth current in a coil
A circuit for generating a sawtooth current (I) in a coil (25), the coil (25) being driven during the trace periods of the sawtooth from an amplifier circuit (4, 6, 7, 9, 15) by a current, and...
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4302708 |
Deflection amplifier system for raster scanned cathode ray tube displays
An efficient cathode ray deflection amplifier is provided having a selectable scan rate capability, providing sweep rate linearity through the use of a feed back arrangement that also cooperates in...
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4216414 |
Isolation transformer for a magnetic deflection yoke
Each orthogonal driver channel for the magnet deflection yoke of a conventional CRT includes a simple bifilar wound transformer which is connected so that the deflection current waveform passes...
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4176300 |
Deflection waveform generator
A deflection waveform generator uses a low voltage accurate capacitor to integrate the yoke deflection current and derive a parabolic waveform for "S" correcting the basic sawtooth deflection...
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4169996 |
Operational amplifier with slew recovery enhancement
Improved slew recovery in a composite driving amplifier for driving a substantially reactive load including a feedback loop to the operational amplifier from the load for regulating the output of...
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4161676 |
Device for displaying variable quantities
A device for displaying variable quantities on the viewing screen of a cathode-ray tube by means of deflection coils which are energized by a number of deflection amplifiers coupled to different...
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4160936 |
Fast-start vertical current feedback circuit
A vertical deflection amplifier includes a preamplifier having an input at which is applied a DC feedback signal for the stabilization of the amplifier's DC output. In order to assure an...
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4142134 |
Direct integration yoke driver for a high speed alphanumeric display system
A high speed driver circuit for the magnetic deflection yoke of an orthogonal channel displaying high speed alphanumeric characters, or the like, includes a first input receiving a stored signal...
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4052645 |
Vertical deflection circuit
A vertical deflection circuit having a vertical amplifier stage bias voltage stabilizing circuit including a differential amplifier circuit which operates only during the retrace period. One input...
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3991345 |
Circuit arrangement for supplying a sawtooth deflection current
A television field deflection circuit with a rapidly controllable large linearity. The deflection current is integrated in a first integrator which is followed by a second integrator having an...
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3988638 |
Circuit arrangement for generating a field deflection current
A field output circuit in which for preventing vertical bounce of the picture and of linearity errors a feedback alternating current path is provided which includes a field frequency clamping...
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3956668 |
Vertical deflection circuit
A vertical deflection circuit including a Miller integrator and a Schmitt trigger circuit in combination to obtain a sawtooth wave signal at an output terminal of the Miller integrator circuit and...
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3882359 |
DEVICE FOR STABILIZING THE BRILLIANCY OF AN OSCILLOSCOPE
A device for stabilizing the brightness of an oscilloscope including a differential circuit with two photo-transistors, only one of which is positioned to receive illumination from the screen of...
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3863106 |
VERTICAL DEFLECTION CIRCUIT
A vertical deflection circuit includes a combination oscillator-sawtooth generator. The oscillator-generator includes controls for adjusting the linearity and S-correction functions simultaneously...
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3842311 |
S-CORRECTED VERTICAL DEFLECTION CIRCUIT
The vertical deflection amplifier in a television receiver is provided with negative feedback responsive to deflection current and amplifier voltage. The feedback, comprising passive filtering...
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3816792 |
CATHODE RAY TUBE HIGH SPEED ELECTROMAGNETIC DEFLECTION SYSTEM
A cathode ray tube dual mode electromagnetic beam deflection control system including an amplifier for driving a deflection coil and means for switching between linear and resonant non-linear...
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3793553 |
LINEARITY CORRECTION CIRCUIT USING NEGATIVE FEEDBACK
A circuit for lessening the initial rate of change of a sweep signal in a deflection system. In a first embodiment, negative feedback from an intermediate stage is utilized in order to slow the...
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3778671 |
DIFFERENTIAL MAGNETIC DEFLECTION AMPLIFIER
A differential magnetic deflection amplifier comprises a plurality of cascaded Class A biased emitter-coupled differential amplifier stages driving a high current output stage operated in a Class...
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3735192 |
VERTICAL DEFLECTION CIRCUITS UTILIZING BOTH REGENERATIVE AND DEGENERATIVE FEEDBACK FOR GENERATING PARABOLIC VOLTAGES
S-shaping is introduced into a sawtooth waveform by a combination of positive and negative feedback of separately adjustable, generally parabolic voltage waveforms so as to provide a suitable field...
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3733514 |
WIDE BAND AMPLIFIER HAVING TWO SEPARATE HIGH AND LOW FREQUENCY PATHS FOR DRIVING CAPACITIVE LOAD WITH LARGE AMPLITUDE SIGNAL
A wide frequency bandwidth amplifier circuit for driving an output load capacitance with large amplitude signals is described in which two separate paths are provided for low frequency and high...
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3660717 |
TELEVISION DEFLECTION CIRCUIT FOR DISTORTION CORRECTION
A vertical deflection circuit for a television receiver that utilizes a flat face picture tube in which the radius of curvature of the face is greater than its distance from the deflection center...
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3611001 |
HIGH-SPEED CURRENT-SWITCHING AMPLIFIERS
Deflection control amplifiers for display devices having opposed deflection control windings, including a differential amplifier stage, a two-stage output amplifier electrically connected for...
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3544810 |
SPURIOUS OSCILLATION SUPPRESSION IN TRANSISTOR DEFLECTION CIRCUITS
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3544811 |
LOCK-ON PREVENTION IN TRANSISTOR DEFLECTION CIRCUITS
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3543081 |
LOW POWER ELECTROSTATIC DEFLECTION SYSTEM
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3541385 |
EFFICIENT PRECISION SWEEP CIRCUIT
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3492527 |
DEFLECTION SYSTEM WITH TEMPERATURE COMPENSATED LINEARITY CORRECTION NETWORK
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3439221 |
DEFLECTION SYSTEM WITH LINEARITY CORRECTION NETWORK
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3437873 |
DISPLAY SYSTEM SECTOR SELECTION AND AMPLIFICATION MEANS
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3435282 |
SELF-OSCILLATING DEFLECTION GENERATOR
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3434004 |
DEFLECTION CIRCUIT WITH FREQUENCY DEPENDENT NEGATIVE FEEDBACK
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3428855 |
TRANSISTOR DEFLECTION CONTROL ARRANGEMENTS
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3405312 |
Transistorized oscilloscope
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