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參數資料
| 型號： | BH7775K |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | VCR audio signal processing system |
| 中文描述： | 錄像機音頻信號處理系統 |
| 文件頁數： | 1/17頁 |
| 文件大小： | 226K |
| 代理商： | BH7775K |
1
Video ICs
VCR audio signal processing system
BH7775K
The BH7775K is an audio signal processing system IC that includes a peak-noise reduction (PNR) processor, an FM
modulator / demodulator circuit, an input / output switcher, an automatic FM detector circuit, an FM band-pass filter,
a normal-audio circuit, a regulator circuit, and automatic adjusting circuits (VCO and BPF).
Applications
VHS Video cassette recorders
Features
1) Operates off dual ± power supply which allows a
large reduction in the number of coupling capacitors
required. A built-in regulator makes it easy to con-
struct a power supply system.
2) A built-in 2-wire serial control decoder circuit allows
serial control of the internal mode settings.
3) Automatic adjusting VCO and BPF circuits that use
the color signal subcarrier frequency (NTSC:
3.579545MHz and PAL: 4.433619MHz) ensure sta-
ble adjustment that is not effected by stress when
the chip is mounted, or variations over time.
4) 4-input switcher (turner, BS, and line 1 and 2).
Output switch with built-in STEREO / LEFT / RIGHT
switching, Hi-Fi / MIX / NORMAL switching, and BS
monitor functions.
5) The PNR processor and FM modulation / demodula-
tion circuit provide reverse characteristics at record-
ing and playback. Also, carrier frequency adjustment
and FM de-emphasis / playback level adjustment
have been combined.
6) Built-in FM band-pass filter connects directly to the
playback amplifier and excels at attenuation of the
other channel. The FM recording output circuit has a
high-performance high-frequency cutoff filter that
produces a sine wave output.
7) Switching noise is reduced by a slope-control type
differential compensation circuit.
8) Built-in envelope detector circuit and noise-detecting
automatic FM detector circuit.
9) Built-in normal-audio signal processing circuit that
allows SP / LP / EP equalizer switching. Control ter-
minal provided for use with the BA7755AF high-volt-
age head switcher.
相關PDF資料 |
PDF描述 |
|---|---|
| BH7800K | Single chip Hi-Fi audio signal processor |
| BH7801BK | Single chip Hi-Fi audio signal processor |
| BH7802K | Single chip Hi-Fi audio signal processor |
| BH7881EFV | Silicon Monolithic Integrated Circuit |
| BH7884EFV | Silicon Monolithic Integrated Circuit |
相關代理商/技術參數 |
參數描述 |
|---|---|
| BH7777AK | 制造商:Panasonic Industrial Company 功能描述:IC |
| BH7778AK | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Processor for VCR |
| BH7779K | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Processor for VCR |
| BH7800K | 制造商:ROHM 制造商全稱:Rohm 功能描述:Single chip Hi-Fi audio signal processor |
| BH7801BK | 制造商:ROHM 制造商全稱:Rohm 功能描述:Single chip Hi-Fi audio signal processor |
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