3. Horizontal deflection signal processing / Vertical and geometrical compensation of the raster
57
FEATURES
Concept features
§
Full horizotal plus vertical autosync capability
§
Extended horizontal frequency range from 15 to
130kHz
§
Comprehensive set of I²C-bus driven geometry
adjustments and functions, including standby
mode
§
Very good vertical linearity
§
Moire cancellation
§
Start-up and switch-off sequence for safe opera-
tion of all power components
§
X-ray protection
§
Power dip recognition
§
Flexible switched mode B+ supply function block
for feedback and feed forward converter
§
Internally stabilized voltage reference
§
Drive signal for focus amplifiers with combined
horizontal and vertical parabola waveforms
§
DC controllable inputs for Extremely High Ten-
sion (EHT) Compensation
§
SDIP32 Package
Synchronization
§
Can handle all sync signals (horizontal, vertical,
composite and sync-on-video)
§
Output for video clamping (leading/trailing edge
selectable by the I²C-bus), vertical blanking and
protection blanking
§
Output for fast unlock status of horizontal syn-
chronization and blanking on grid 1 of picture
tube.
Horizontal section
§
I²C-bus controllable wide range linear picture
position, pin unbalance and parallelogram
correction via horizontal phase
§
Frequency-locked loop for smooth catching of
horizontal frequency
§
Simple frequency preset of fmin and fmax by
external resistors
§
Low jitter
§
Soft start for horizontal and B+ control drive
signals.
Vertical section
§
I²C-bus controllable vertical picture size, picture
position, linearity (S-correction) and linearity
balance
§
Output for the I²C-bus controllable vertical
sawtooth and parabola (for pin unbalance and
parallelogram)
§
Vertical picture size independent of frequency
§
Differential current outputs for DC coupling to
vertical booster
§
50 to 160 Hz vertical autosync range.
East-West (EW) section
§
I²C-bus controllable output for horizontal
pincushion, horizontal size, corner and trapezium
correction
§
Optional tracking of EW drive waveform with line
frequency selectable by the I²C-bus.
Focus section
§
I²C-bus controllable output for horizontal and
vertical parabolas
§
Vertical parabola is independent of frequency
and tracks with vertical adjustments
§
Horizontal parabola independent of frequency
§
Adjustable pre-correction of delay in focus output
stage.
I²C-bus autosync deflection controller for PC monitors
TDA4857
Summary of Contents for MultiSync 75F-3
Page 56: ...DDC Flow Chart 53 ...
Page 57: ...Master I C Flow Chart 54 ...
Page 58: ...Master I C restart mode Flow Chart 55 ...
Page 59: ...Slave I C Flow Chart 56 ...
Page 61: ...BLOCK DIAGRAM I C bus autosync deflection controller for PC monitors TDA4857 58 ...
Page 71: ...I C bus autosync deflection controller for PC monitors TDA4857 68 APPLICATION INFORMATION ...
Page 77: ...74 8 Monolithic triple 13 5nS CRT driver ...
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