BA7746S

Video ICs VCR Hi-Fi audio signal REC / PB amplifier BA7746S / BA7746FS The BA7746S and BA7746FS contains the recording and playback amplifiers required for Hi-Fi VCR signal processing. The recording system uses a constant-current amplifier with AGC to eliminate the need to adjust the recording current, and ensure stable operation as the head wears. The IC also features REC MUTE and OVER REC functions. The playback system has a high-gain preamplifier, a low- offset head switch, VCA, and an EP-gain amplifier. In addition, all functions operate off a single 5V supply, and a H / L control system eliminates the need for special power supplies for the recording and playback systems. The IC has low power consumpution, and comes in a compact 32-pin SSOP-A package that requires little area on the PCB. It will improve the reliability and performance of your designs while reducing external component requirements. Applications VCRs Features 1) The low-noise playback amplifier has a total gain of 79dB (Typ.). Designed for VHS-band operation with low external parts count. It has two built-in circuits for Hi-Fi VCR operation. The circuit has been designed to suppress headswitching noise. Built-in EP / SP gain switching function that boosts the playback gain by 5dB. Built-in VCA for easy playback output adjustment. High-output recording amplifier for audio FM recording. Constant-current drive povides stable recording characteristics when the load (head impedance) is fluctuating. 2) 3)...