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参数资料
| 型号： | MC44BC374CD |
| 厂商： | MOTOROLA INC |
| 元件分类： | 消费家电 |
| 英文描述： | PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封装： | SO-16 |
| 文件页数： | 20/30页 |
| 文件大小： | 915K |
| 代理商： | MC44BC374CD |
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20
MC44BC373C/374C Technical Data
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Modulator Description
13.11
Sound Section
The multivibrator oscillator is fully integrated and does not require any external components. An internal
low-pass filter and matched structure give a very low harmonics level.
The sound modulator system consists of the following two types:
An FM modulator incorporating the sound subcarrier oscillator
An AM modulator (MC44BC373C only)
The audio input signal is AC-coupled into the amplifier, which then drives both types of modulator.
The audio pre-emphasis circuit is a high-pass filter with an external capacitor and an internal resistor
(100kOhms). The recommended capacitor value (470pF) is for BG standard; time constant is 50
μ
S.
13.12
Test Pattern Generator
The IIC 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 976Hz audio test signal.
Table 1. Test Pattern Generator
10
20
30
40
50
60
0
64
TE1
24 28
44
TIMEINμS.
7/10
3/10
TE2
F
Freescale Semiconductor, Inc.
n
.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC44BC374CDR2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| MC44BC374CDTB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC44BC374CDTBR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC44BC374CED | 制造商:Motorola Inc 功能描述: |
| MC44BC374CEDR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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