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MC44BS373CADR2 데이터시트(PDF) 24 Page - Freescale Semiconductor, Inc

부품명 MC44BS373CADR2
상세설명  PLL-Tuned UHF and VHF Audio/Video High-Integration Modulator
PDF  52 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC44BS373CADR2 데이터시트(HTML) 24 Page - Freescale Semiconductor, Inc

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MC44BS373CA Data Sheet
MC44BS373CA Modes of Operation
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 INµS.
7/10
3/10
TE2



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