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Solutions Search - Video Processing

Input Video Selector and ADC Driver for Multimedia Display System

Aug 19th 2005
Input selection is readily implemented with the LT6556 on 5V, supporting all video resolutions including UXGA by virtue of its 750MHz bandwidth and 6.5ns settling time. For the AC-coupling shown, the outputs swing approximately ±0.7V about the mid-supply level, within an available range of 2.6VP-P. ...

Circuit 

 

YPBPR to RGB Converter

Sep 26th 2003
In this realization of a component video (YPBPR) to RGB adapter, amplifier count is minimized by performing passive arithmetic at the outputs, but this requires higher gains, thus a higher supply potential is needed for this (for at least the positive rail). One small drawback to this otherwise compact solution is that the ...

Circuit 

 

YPBPR to RGB Video Converter

Jul 18th 2003
This circuit shows LT6552 amplifiers connected to convert component video (YPBPR) to RGB. This circuit maps the sync on Y to all three outputs, so if a separate sync connection is needed by the destination device (e.g. studio monitor), any of the R, G, or B channels may be simply looped-through the sync input (i.e. set ZIN ...

Circuit 

 

LT6550 RGB to YPBPR Component-Video Conversion

Jun 27th 2002
Figure 15 shows a method of generating the standard definition YPBPR signals from an RGB source using a pair of LT6550 triple amplifiers. It should be noted that to ensure Y includes a correct sync, correct syncs should be present at all three inputs or else added directly at the Y output (gated 8.5mA current sink or 350Ω ...

Circuit LTspice 

 

High Speed RGB to YPBPR Converter

Jan 19th 2000
An LT6559 and an LT1395 can also be used to map RGB signals into YPBPR “component” video. The LT1395 performs a weighted inverting addition of all three inputs. The LT1395 output includes an amplification of the R input by –324/1.07k = –0.3. The amplifi cation of the G input is by –324/549 = –0.59. Finally, the B ...

Circuit 

 

Buffered RGB to Color-Difference Matrix

Dec 11th 1998
Two LT1399s can be used to create buffered color difference signals from RGB inputs. In this application, four amplifiers are used to create color difference signals. The luminance signal Y is created using amplifiers A2 and A3. The remaining color-difference signals each use a single amplifier and the newly created Y output ...

Circuit 

 

RGB Video Inverter

Oct 14th 1998
This circuit is useful for viewing photographic negatives on video. A single channel can be used for composite or monochrome video. The inverting amplifier stages are only switched in during active video so the blanking, sync and color burst (if present) are not disturbed. To prevent video from swinging negative, a voltage offset ...

Circuit 

 

Two-Input Video Fader

Feb 11th 1994
In some cases it is desirable to adjust amplitude of a video waveform, or cross-fade between two different video sources. This circuit provides a simple means of accomplishing this. The 0V to 2.5V control voltage provides a steering command to a pair of amplifier input sections; at each extreme, one section or the other takes ...

Circuit 

 

Gamma Correction Amplifier

Mar 23rd 1992
This circuit shows a schematic of a typical circuit which can correct for positive or negative gamma. This is an upgrade of a classic circuit which uses diodes as the nonlinear elements. The temperature variation of the diode junction voltages is compensated to the fi rst order by the balanced arrangement. LT1227s and LT1229s ...

Circuit