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BH7775K Datasheet

  • BH7775K

  • VCR audio signal processing system

  • 17頁(yè)

  • ROHM

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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).
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Applications recorders
VHS Video cassette
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Features off dual 鹵 power supply which allows a
1) Operates
2)
3)
large reduction in the number of coupling capacitors
required. A built-in regulator makes it easy to con-
struct a power supply system.
A built-in 2-wire serial control decoder circuit allows
serial control of the internal mode settings.
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-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.
The PNR processor and FM modulation / demodula-
tion circuit provide reverse characteristics at record-
6)
ing and playback. Also, carrier frequency adjustment
and FM de-emphasis / playback level adjustment
have been combined.
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.
Switching noise is reduced by a slope-control type
differential compensation circuit.
Built-in envelope detector circuit and noise-detecting
automatic FM detector circuit.
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.
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BH7775K相關(guān)型號(hào)PDF文件下載

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  • 英文版
    VCR audio signal processing system
    ROHM
  • 英文版
    VCR audio signal processing system
    ROHM [Rohm...
  • 英文版
    Audio Processor for VCR
    ETC
  • 英文版
    VCR audio signal processing system
    ROHM
  • 英文版
    Analog signal I / O interface for portable audio application...
    ROHM
  • 英文版
    Analog signal I / O interface for portable audio application...
    ROHM [Rohm...
  • 英文版
    Audio Processor for VCR
    ETC
  • 英文版
    Audio Processor for VCR
    ETC

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