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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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STV2216 bảng dữ liệu(PDF) 4 Page - STMicroelectronics |
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STV2216 bảng dữ liệu(HTML) 4 Page - STMicroelectronics |
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4 / 26 page  FUNCTIONAL DESCRIPTION (continued) 2 - FILTERS - Integrated trap filter : Q = 1 fo f−3dB − f−3dB fo Q = 2.5 at sharp. min Center frequency : 4.43MHz, 3.58MHz for PAL, NTSC - Integrated chroma bandpass : Q = 3.5 Center frequency : 4.43MHz, 3.58MHz - Integrated delay line : Bandwidth = 8MHz - Integrated low pass filter for deflection part. - All filters are tuned with a reference phase locked loop. The PLL consists of a lowpass filter, a phase comparator, a loop filter (with an external capaci- tor). The reference signal is the continuous carrier wave from the VCO (4.43MHz or 3.58MHz). The PLL adjusts the centerfrequencyof the lowpass so that it is equal to the reference signal. The tuning voltage of the PLL is used to adjust all other filters. 3 - VIDEO CIRCUIT - 1 analogRGB input with fixed gain. It may be used for OSD, Text, ... - Oversize blanking capability on FB(OSD)(Pin15) input. The RGB ouputs will be blanked when the voltage on Pin 15 will exceed the second thresh- old at 2V (blanking threshold) : the whole field is blanked but not the inserted cut-off pulses. The OSD insertion threshold is 0.7V. - Automatic cut-off current loop : 2V cut-off range. Sequential cut-off current measurement during the three lines after the frame blanking signal. Leakage current measurement during the frame blanking, memorization on an internal capacitor. - Possibility to force through the bus the inserted cut-off pulses on lines 23/24/25(CCIR) in 50Hz and 60Hz mode. This will increase frame blan- king time in 60Hz mode. - Warm up detector. - Beam current limiter DC voltage input. The beam current limiter control voltage will act on contrast first, then the brightness will be de- creased when contrast attenuation reaches -5dB. - Bus control of the red, green and blue channel gain (White point adjustment) - Bus control of the red and green DC levels (black point adjustment) - PAL matrix, specific NTSC matrix when demodu- lation angles are (0 o, 104o). - Switch-off of the trap filter in SVHS mode. - Bus controlled contrast on luminance (20dB range) - Bus controlled saturation (50dB range) - Bus controlled brightness : 40% range at maxi- mum contrast. - Bus controlled sharpness (peaking). - Noise coring function on sharpness. Can be disabled through the bus - Bus controlled blue screen feature. - Black stretcher. Can be disabled through the bus. STV2216 4/26 |
Số phần tương tự - STV2216 |
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Mô tả tương tự - STV2216 |
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