|
Match
|
Document |
Document Title |
|
|
7265681 |
Light emitted diode driving apparatus
A driving apparatus includes a DC-to-DC converter, a first LED series, a second LED series, a first constant-current circuit, a second constant-current circuit, and a feedback circuit. The DC-to-DC...
|
|
|
6642634 |
Vertical ramp wave generating circuit
The invention includes: a capacitor 11 for generating ramp wave; a constant current source 10 for supplying constant current to the capacitor 11 for generating ramp wave; voltage fixing means for...
|
|
|
6600277 |
Power supply
The invention relates to a power supply (9) for a deflection circuit (1), that comprises a deflection coil (2) for connection to a picture tube, a drive circuit (4,5,6) connected to the deflection...
|
|
|
6590353 |
Device for the control of a circuit for the vertical deflection of a spot scanning a screen
Disclosed is a device to control a circuit for the vertical deflection of a spot scanning a screen, and more particularly a control device whose output amplifier stage works in class D mode at the...
|
|
|
6411048 |
Method and device for controlling a circuit for the vertical deflection of a spot scanning a screen, in particular for a television set or a computer monitor
The control device includes an output amplifier stage ETS supplied by a main supply for controlling the vertical scan of the spot, and an auxiliary supply capable of delivering an overvoltage and a...
|
|
|
6087789 |
Hybrid bridge magnetic deflection amplifier
A magnetic deflection amplifier implemented using a linear amplifier connected to a first side of a deflection coil and a three pole switch connected to a second side of the deflection coil. The...
|
|
|
5963135 |
Proximity detecting device
The present invention relates to a proximity detecting device for detecting the presence of an object in a target area, comprising a low voltage power source, a circuitry for generating electrical...
|
|
|
5814953 |
Power amplifier predriver stage
A power amplifier circuit drives a load with a convergence correction current which is proportional to a convergence correction voltage waveform that is applied to the power amplifier circuit. A...
|
|
|
5569985 |
Amplifier for scanning beam velocity modulation
Scanning beam velocity modulation or SVM may be employed to produce subjective enhancement of picture sharpness. However, impulsive SVM deflection current may produce unwanted crosstalk into other...
|
|
|
5504539 |
Circuit for modulating vertical positions of a picture in a wide screen television
This invention relates to a circuit for solving a vertical interlace phenomenon generated by the instability of servo control when a mode of VCR operation is fast or still, comprising a vertical...
|
|
|
5465032 |
Vertical deflection circuit
A vertical deflection circuit includes a first pin which receives a forward scanning voltage having a first level and a first frequency. During a flyback period a second pin receives a flyback...
|
|
|
5359267 |
Vertical deflection with vertical shrink mode
A differential amplifier formed by a pair of transistors couples a vertical sawtooth signal to an input side of a vertical deflection amplifier. Nonlinearity of the transistor pair provides...
|
|
|
5319287 |
Vertical deflection circuit
The invention relates to a vertical deflection circuit of a cathode ray tube (CRT) using electromagnetic deflection. In the vertical deflection circuit, there is provided a pulse width varying unit...
|
|
|
5111120 |
Raster corrected vertical deflection circuit
Two windings of a flyback transformer in a horizontal deflection circuit are inductively coupled with opposite polarity to a source of horizontal rate retrace pulses. The windings have a common...
|
|
|
5065186 |
Magnetic emissions reduction apparatus and method
An special arrangement of the magnetic components of a horizontal sweep output circuit to reduce the net flux density and magnetic induction that are present at the exterior of a video display. The...
|
|
|
4982178 |
Shadow mask color system with calligraphic displays
A display system is disclosed utilizing a cathode ray display device utilizing three electron beams which are directed through a shadow mask to excite three-color phosphor dots, and which is...
|
|
|
4961032 |
Dual power source output amplifier
A dual power source output amplifier comprises at least one pair of first and second input voltage sources of like polarity, operating at low and high voltage magnitude levels respectively relative...
|
|
|
4959594 |
Power saving electromagnetic deflection display system for dual mode deflection amplifier
An electromagnetic deflection display system is operative for bi-directional raster and stroke deflection and provides minimum power dissipation in raster mode during a segmented or patch raster...
|
|
|
4926098 |
Push-pull class-E bi-directional scanning circuit
A bi-directional scanning system for a CRT is disclosed comprising: a vertical CRT deflection coil, a horizontal CRT deflection coil; two class-E switchmode amplifiers which are connected in a...
|
|
|
4918359 |
Cathode ray tube display device
A vertical deflection circuit used in a cathode ray tube display device for shortening a vertical blanking period is disclosed which includes back-flow blocking diode means for preventing an...
|
|
|
4916371 |
Vertical deflection circuit for kinescope yokes, with flyback voltage generator
The circuit, particularly suitable for high-definition monitors, wherein a power amplifier is fed by a supply voltage source to generate a deflection current in a yoke, furthermore comprises...
|
|
|
4906904 |
Cathode ray tube deflection circuit with solid state switch
A solid-state switch in a deflection circuit includes a plurality of field-effect transistors (Q7, Q8, and Q9) connected in series. Each of the transistors (Q7, Q8, and Q9) is part of a switching...
|
|
|
4884012 |
Vertical deflection current generator
A vertical deflection current generator includes an operational amplifier responsive to an input sawtooth signal at a vertical rate. A first end terminal of a deflection winding is coupled to an...
|
|
|
4820960 |
Fast retrace circuit for a deflection amplifier in a cathode ray tube
A method and apparatus for the fast retrace of the electron beam in a cathode ray tube are disclosed. A deflection signal is presented to a cathode ray tube deflection system upon the detection of...
|
|
|
4795949 |
Deflection current correction circuit
In a video display apparatus having an on-screen display feature (OSD), a vertical deflection circuit includes a vertical deflection winding coupled to a DC blocking capacitor. A deflection...
|
|
|
4795948 |
Vertical deflection circuit with service mode operation
In a video display apparatus having a service mode of operation, a vertical deflection circuit includes a vertical deflection winding coupled to a DC blocking capacitor. An output stage is coupled...
|
|
|
4731564 |
Service switch for video display apparatus
A vertical deflection circuit for a video display apparatus includes a service switch that collapses vertical or field rate scan in order to facilitate adjustment of cathodes ray tube electron beam...
|
|
|
4730148 |
Vertical deflection circuit
A vertical deflection circuit includes a vertical deflection coil; a vertical deflection circuit for supplying an vertical deflection current to the vertical deflection coil; a current multiplying...
|
|
|
4719393 |
Deflection amplifier
A deflection amplifier for a CRT display device which generates a sweep ramp by means of a low distortion complimentary push-pull amplifier. The amplifier generates a compliance voltage which is...
|
|
|
4712047 |
Power on demand beam deflection system for dual mode CRT displays
A cathode ray beam deflection system operable in slew and random stroke and periodic raster display modes provides automatic power supply voltage switching to maintain linear operation and high...
|
|
|
4700114 |
Vertical deflection circuit
A vertical deflection amplifier of a video display apparatus includes first and second transistor amplifier output stages arranged in a totem-pole, push-pull configuration. A vertical deflection...
|
|
|
4694226 |
Vertical deflection circuit with service mode operation
In a video display apparatus having a service mode of operation, a vertical deflection circuit includes a vertical deflection winding coupled to a DC blocking capacitor. An output stage includes...
|
|
|
4678970 |
Power as required beam deflection system for CRT displays with raster supply switching
An electron beam magnetic deflection system capable of raster and stroke deflection and providing minimum power dissipation in raster mode. Automatic switching of the voltage demanded in raster...
|
|
|
4625155 |
Resonant switching apparatus using a cascode arrangement
An apparatus for generating a periodic resonant pulse voltage across an inductance includes first and second switches coupled together in a series cascode arrangement. The cascode arrangement...
|
|
|
4535273 |
Transformerless switching circuit for driving a horizontal output transistor
A transformerless switching circuit is described for rapidly turning a horizontal output transistor off and on in response to horizontal rate input pulses. The switching circuit includes a first...
|
|
|
4484111 |
Signal amplifier for a signal recording device with magnetic deflection
The signal amplifier is used for amplification of an input signal with varying control amplitude, particularly in the field of electromedicine. The amplifier contains at least two amplification...
|
|
|
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...
|
|
|
4353013 |
Drive circuits for a high resolutions cathode ray tube display
A dynamic new circuit is disclosed which permits an extremely high resolution cathode ray tube display. Utilizing this circuit, horizontal drive operating frequency may be increased by a factor of...
|
|
|
4334173 |
Horizontal width control circuit for image display apparatus
A horizontal width control circuit for use with an image display apparatus includes first and second variable inductors connected in series and shunt relationship respectively with a horizontal...
|
|
|
4314184 |
Deflection coil driver apparatus
A deflection coil driver includes a current driver stage comprising three power transistors, a first power transistor being caused to turn on via a class B transistor stage when an input signal of...
|
|
|
4297621 |
Cathode ray tube beam deflection amplifier system
A cathode ray dual mode electromagnetic beam deflection amplifier system for providing current for driving a deflection coil, and means for switching between linear and resonant non-linear...
|
|
|
4293803 |
Vertical deflection circuit
A resonant retrace vertical deflection circuit comprises a retrace capacitor which forms a resonant circuit with the yoke vertical deflection windings during retrace of the electron beams. One or...
|
|
|
4289994 |
Vertical drive circuit for video display
Disclosed is a vertical drive circuit for a cathode ray tube in a video display in which sawtooth current waveform corrections for the deflection yoke are made by means of an S-correction feedback...
|
|
|
4288738 |
Dual-mode amplifier
A circuit, including a dual-mode amplifier, for producing a controlled current through an inductance; in particular, the inductive yoke of a cathode-ray tube electromagnetic deflection system. A...
|
|
|
4262235 |
Deflection amplifier
An improved drive for the deflection coil of a cathode ray tube. A first deflection, low-power supply means drives the deflection coil causing the electron beam to scan the face of the tube. A...
|
|
|
4241296 |
Horizontal deflection circuit including protection for output transistor
A circuit for driving and protecting the horizontal output transistor of a resonant raster scan display is disclosed. The driving circuitry described provides a circuit for separately establishing...
|
|
|
4238713 |
Vertical deflection circuit
A push-pull pair of output transistors provides trace current to a vertical deflection winding. A retrace capacitor forms a resonant retrace circuit with the deflection winding to develop a...
|
|
|
4227123 |
Switching amplifier for driving a load through an alternating-current path with a constant-amplitude, varying duty cycle signal
An amplifier includes first and second switches coupled at a junction to form a series circuit. The series circuit is serially coupled with an inductor across a source of energizing potential. A...
|
|
|
4218638 |
Push-pull amplifier
A vertical deflection amplifier includes a driver amplifier stage having a source of sawtooth deflection signals at the vertical rate and direct current feedback from the vertical deflection...
|
|
|
4215295 |
Deflection circuit for a picture tube
A sawtooth wave generated in a sawtooth wave generator circuit of a vertical deflection circuit assumes a predetermined maximum voltage at the start of a vertical scan and a minimum voltage which...
|