参数资料
型号: MC44BS373CAFCEVK
厂商: Freescale Semiconductor
文件页数: 17/52页
文件大小: 0K
描述: KIT EVAL FOR BS373CAFC 16PIN
标准包装: 1
主要目的: 音频视频集成调制器
已用 IC / 零件: MC44BS373CA
MC44BS373CA Data Sheet
MC44BS373CA Modes of Operation
Figure 6. Typical Attenuator Application with Pin Diode
15.9 Video Section—Peak White Clip
The MC44BS373CA requires the following for proper video functionality:
A composite video input with negative going sync pulses
A nominal level of 1 Vp-p
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.
15.10 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 7. Test Pattern Generator
LOP pin
Vcc
TV Out
Antenna
Input
10
20
30
40
50
60
0
64
TE1
24 28
44
TIME INS.
7/10
3/10
TE2
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