BA7797F Datasheet | ROHM

Video ICs VCR standard audio signal processor The BA7797F is standard audio signal processor designed for use in VCRs and tape decks. The circuit is prised of a playback preamplifier, a line amplifier, a recording amplifier, an ALC circuit and high-voltage head switch. The IC has a built-in coil equivalent circuit for recording equalization, which eliminates the need for an external ponent. Applications - Video cassette recorders and tape decks Features - 1) Two input switching systems built-in (LINE and TUNER). 2) Built-in coil equivalent circuit for recording equalization. 3) High-performance low-noise playback amplifier. 4) ALC level can be adjusted by connection of an external resistor. 5) patible with single-mode EQ making it ideally suited to widely-used decks. - Block diagram PB IN 1 REC 18 GND REC HEAD SW 17 PB PB NFB REC OUT 3 REC AMP EQ + 28d B LINE PB OUT REC L 0d B PB LINE IN 5 ALC ALC FILTER RIPPLE FILTER - 8d B TUNER IN REC / EE CTRL 7 MUTE PB / TU / LINE CTRL BUFF LINE OUT - 8d B LINE IN ALC LEVEL...