Document
TEA2130
TV AND SATELLITE DECODER SCANNING PROCESSOR
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AUTOMATIC TIME CONSTANT SWITCHING FOR VCR DIGITAL VIDEO IDENTIFICATION CIRCUIT 500kHz RESONATOR OSCILLATOR NO LINE AND FRAME OSCILLATOR ADJUSTMENT DUAL PLL FOR LINE DEFLECTION SUPER SANDCASTLE OUTPUT AUTOMATIC 50Hz/60Hz STANDARD IDENTIFICATION EXCELLENT INTERLACING CONTROL FRAME SAFETY INPUT FRAME SAWTOOTH GENERATOR FULLY ESD AND LATCH-UP PROTECTED
DIP20 (Plastic Package)
DESCRIPTION The TEA2130 is a complete (horizontal and vertical) deflection processor, for TV applications and all applications which require a flexible, high performance scanning processor (Satellite Decoder, Video Multimedia). PIN CONNECTIONS
ORDER CODE : TEA2130
REFERENCE VOLTAGE VCR DETECTOR OUTPUT Φ1 FILTER GROUND V CC FRAME SAFETY INPUT IDENTIFICATION OUTPUT LINE SAW-TOOTH CURRENT REFERENCE LINE MONOSTABLE CAPACITOR
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
NOISE MEASUREMENT OUTPUT VIDEO INPUT 50% CAPACITOR VCO INPUT FRAME SAW-TOOTH GENERATOR FRAME SAW-TOOTH OUTPUT Φ2 FILTER LINE FLYBACK INPUT SUPER SANDCASTLE OUTPUT
2130-01.EPS
LINE OUTPUT
September 1993
1/8
TEA2130
BLOCK DIAGRAM
18 17 16 15
19
LINE SYNCHRO SEPARATOR
VCO 500kHz
FRAME SEPARATOR
FRAME SAWTOOTH GENERATOR
2µ s 20
NOISE MEASURMENT
LS
Ident 60Hz
RAZ 14
Φ2
Mute
VREF
1
VCC /2
AUTO VCR SWITCH
Φ1
500kHz
2
FRAME LOGIC
SUPER SAND
13 12 Inhibition
Burst
CASTLE GENERATOR
3 ϕ1
DIGITAL MUT
Burst
ϕ2
Mute
PHASE CONTROL LINE OUTPUT LINE MONOST LINE OUTPUT
11
2µs
LINE LOGIC
Mute 10 1.3V
VOLTAGE
1.3V
50/60Hz Mute
REFERENCE
9
FRAME SECURITY DETECTION
50/60Hz & MUT OUTPUT
RAZ LINE SAWTOOTH
GENERATOR
8
4 GND
5
6
7
VC C
GENERAL DESCRIPTION Introduction This integrated circuit uses high density I2L bipolar technology and combines analog signal processing with digital processing. Timing signals are obtained from a voltage-controlled oscillator (VCO) operating at 500kHz by means of a cheap ceramic resonator. This avoid the frequency adjustment normally required with line and frame oscillators. A chain of dividers and appropriate logic circuitry produces very accurate defined sampling pulses and the necessary timing signals. Internal Functions - Horizontal scanning processor - Frame scanning processor - B class frame output stage using an external power amplifier with flyback generator - Line and frame synchronization separation - Dual phase-locked loop horizontal scanning - High performance frame and line synchronization with interlacing control.
- Supersandcastle generator with reduced burst gate pulse for 60Hz - Automatic 50Hz / 60Hz standard identification - Frame saw-tooth generator - Digital video identification circuit - Very steady free running mode of the line and frame oscillator when no video is detected. This allows on screen display without phase Jitter in research mode of the tuner - Automatic VCR mode recognition for time constant switching - Frame safety input WORKING DESCRIPTION Synchronization Separator Line synchronization separator is clamped to black level of input video signal with synchronization pulse bottom level measurement. The synchronization pulses are divided centrally between the black level and the synchronization pulse bottom level, to improve performance on video signal in noise conditions.
2/8
2130-02.EPS
TEA2130
Frame Synchronization Frame synchronization is fully integrated (no external capacitor required). The frame timing identification logic permits automatic adaptation to 50-60Hz standards or non-interlaced video. An automatic synchronization window width system provides: - Fast frame capture (7.3ms wide window) - Good noise immunity (0.4ms narrow window) The internal generator starts the discharge of the sawtooth generator capacitor, so that it is not disturbed by line flyback effects. Thanks to the logic control, the beginning of the charge phase does not depend on any disturbing effect of the line flyback. A 32µs timing is automatically applied on standardized transmissions for perfect interlacing. In VCR mode, the discharge time is controlled by an internal monostable independent of the line frequency and gives a direct frame synchronization. Horizontal Scanning The horizontal scanning frequency is obtained from the 500kHz VCO. The circuit uses two PLL: - The first one controls the frequency - The second one controls the relative phase of the output line pulse and the line flyback signals. The output pulse has a constant duration of 29µs, independent of VCC and of any delay in switchingoff the scanning transistor. Supersandcastle Generator This output delivers a 3 level synchronization signal: - Burst level - Line blanking level - Frame blanking level In the event of vertical scanning failure, the frame blanking level goes high to protect the tube. ABSOLUTE MAXIMUM RATINGS
Symbol VCC V16 I11 I13 TAMB Parameter Supply Voltage Pulse/Frame Sawtooth Generator Voltage Output Current Input Current Operating Ambient Tem.