Overview
The LA7256 provides the record and playback amplification functions required for high-fidelity audio signal processing in VCR systems. The record system supports S-VHS and over-recording, and also supports the provision of an adjustment-free record current by using a constant-current regulated output scheme incorporating an AGC circuit. The playback system consists of a high-gain preamplifier with a small DC offset, and includes a builtin EP gain increasing function.
   
Features
• Minimal number of required external components
• The playback amplifier output DC offset is small.
• Built-in EP mode gain emphasis
• Record AGC that handles three modes (for an
    adjustment-free record current)
• Built-in buffer amplifier that can be used to construct an
    active filter.
   
Functions
• Preamplifier (two channels)
• RF switching between CH1 and CH2
• Record AGC amplifier (for over-recording and S-VHS)
• Constant-current regulated output record amplifier
• Buffer amplifier that can be used in both record and
    playback