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Video ICs

VCR standard audio signal processor

BA7795LS / BA7795FS

The BA7795LS and BA7795FS are standard audio signal processor ICs. They contain a playback preamplifier, line

amplifier, recoeding amplifier, ALC circuit, EQ switch circuit and high-voltage head switch, and provide all of the functions

required for normal-audio signal processing on a single IC with a minimum number of external components required.

Video cassette recorders and tape decks

1) Available in compact SZIP and SSOP-A24-pin pack-

ages.

2) High-with standing-voltage head switch (AC with

3) Simple, three-mode EQ switch built-in (BA7795LS).

4) Built-in LINE / TUNER selector switch.

5) High-performance low-noise playback amplifier.

Input conversion noise figure – 122dBV

(Typ. Rg = 680, DIN AUDIO).

6) ALC level can be varied.

7) ALC loop external mute eliminates audible noise at

power on, and ALC attack noise.

8) Signal processing circuit can be constructed with the

addition of just a few external components.

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PB IN

GND

PB NFB

PB EQ

PB OUT

PB LINE IN

ALC FILTER

LINE IN

TUNER IN

GND

LINE OUT

REC / EE CTRL

HEAD EQ

REC HSW

RIPPLE FILTER

EQ CTRL

PB / TU / EE CTRL

BIAS

MUTE CTRL

REC NFB

ALC LEVEL

REC OUT

REC EQ

ALC

– 20dB

REC

LINE

+ 20dB

BA7795LS

layout to the BA7795LS.