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STV9212 Datasheet

  • STV9212

  • Video Processor for CRT Monitors with PictureBooST

  • 34頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STV9212
Video Processor for CRT Monitors with PictureBooST鈩?/div>
Main Features
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General
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I虜C-Bus Controlled
Supports AC- and DC-coupled applications
5V to 8V Power Supply
Matches to virtually any video amplifier
DIP24S:(Plastic
Package)
ORDER CODE: STV9212
PictureBooST鈩?insertion input
Full-screen PictureBooST鈩?via I虜C-bus
Context-sensitive Picture Enhancement
Input and Output Video Clamp
Sync Pulse Polarity Auto-rectification
Clamp Pulse Generation timed either by sync
or video blanking pulse
Contrast Adjustment with excellent channel
matching
Gain stages for control of white
Two DC-mode cut-off ranges
Output DC offset control
Automatic Beam Limiter (ABL)
Video Insertion Pulse (VIP), 2 levels
Amplifier Control (Blanking and Stand-by)
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PictureBooST鈩?/div>
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Video Clamping
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General Description
The STV9212 is an I虜C-bus controlled color video
processor designed for standard CRT monitor
applications. It can drive systems where cathodes
are either AC- or DC-coupled to the amplifier
outputs. The three video channels provide contrast
and white balance separate gain adjustments as
well as one-per-channel DC cut-off control and
common DC offset control functions. On top of
these usual controls, it features context-sensitive
picture enhancement circuitry to support the
PictureBooST鈩?function that enhances the
appearance of still pictures and moving video.
In AC coupling applications, the device can pilot
three cathode DC restore channels dedicated to set
CRT cut-off bias voltages and to control brightness
through cathodes.
The RGB video outputs have a class A architecture
and directly drive the amplifier channels without
unnecessarily consuming current. Bandwidth
limitation I虜C-bus adjustments can contribute to
keeping the application EMI under control.
OSD (On-Screen Display) graphics are inserted by
means of a Fast Blanking signal. Independent OSD
contrast control facilitates adaptation to various
OSD generators and provides system flexibility.
The STV9212 is perfectly compatible with other ST
components for CRT video boards, such as video
amplifiers and OSD generators.
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Video Processing
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OSD Insertion with Contrast Control
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Control Output
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Amplifier Standby and Blanking Control
3 DAC for control of DC Restore Amplifier or
Brightness in DC-coupled system
October 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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