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BH3540AFS-E2ROHS
Optical disc ICs Headphone amplifier with internal LPF and EVR for CD-ROM BH3540AFS The BH3540AFS is an H / P amplifier with internal secondary LPF and EVR circuits. When multibit output from a D / A converter is input, the secondary LPF outputs an audio signal. Output level for headphones can be changed with the EVR circuit. This IC also has independent internal mute circuits for the left and right channels. FApplications CD-ROM drives and other products (with line and headphone output pins) that process digital audio signals FFeatures 1) Internal LPF, line amplifier and EVR. 2) Internal mute function. 3) Internal thermal shutdown circuit. FBlock diagram 146 4) No attached oscillation prevention components are needed, even at a load of 8Ω. 5) Mute function reduces the popping noises that can occur when the power is turned on and off. Optical disc ICs FMeasurment circuit 148 BH3540AFS
ROHM
ローム株式会社
日本
炭素皮膜抵抗の特許を元に創業した。社名のROHM（R:抵抗 Ohm:抵抗を示す単位）はそこに由来する。その後、大規模集積回路の製造を手がけ始め、現在は様々な機能を顧客の要望に応じてLSI上に集積するカスタムLSIが主力となっている。
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