參數資料
型號: MC44BS374T1EF
廠商: Freescale Semiconductor
文件頁數: 16/34頁
文件大?。?/td> 0K
描述: IC AUDIO/VIDEO MODULATOR 16-SOIC
標準包裝: 48
類型: NTSC/PAL 調制器
應用: 音頻/視頻,VCR,機頂盒
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC N
包裝: 管件
Modes of Operation
MC44BS374T1/374T1A Advance Information
16.8 Video Section - Peak White Clip
The MC44BS374T1/374T1A requires the following for proper video functionality:
A composite video input with negative going sync pulses
A nominal level of 1Vpp
This signal is AC-coupled to the video input where the sync tip level is clamped.
The video signal is then passed to a Peak White Clip (PWC) circuit. The PWC circuit function soft-clips
the top of the video waveform, if the sync tip amplitude to peak white clip goes too high. This avoids
carrier over-modulation by the video. Clipping can be disabled by software.
16.9 Test Pattern Generator
The I2C generates a simple test pattern, which can be switched under bus control to permit a TV receiver to
easily tune to the modulator output. The pattern consists of two white vertical bars on a black background
and a 976 Hz audio test signal.
Figure 8. Test Pattern Generator
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TE1
24 28
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TIME IN S.
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TE2
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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