Description

HA12167FB/HA12169FB is silicon monolithic bipolar IC providing REC volume system, Level meter system and Dolby noise reduction system in one chip.

Features

• Available to create characteristics of REC equalizer by changing external resistor, no coil

• Equalizer volume is available to calibrate recording automatically with micro-controller

• Electronic volume built-in is available to set the level of recording and play back automatically with micro-controller

• 4 types of input (3 out of 4 are by way of electronic volume)

• Input electronic control switching is irrelevant to REC/PB electronic control switching

• Dolby noise reduction system is available with double cassette decks (Unprocessed signal output available from recording out terminals during PB mode)

• Log-compressed level meter output is range from 0 V to 5 V (Usable as music search switchable gain of 0 dB and 20 dB respectively)

• Normal-speed/high-speed, normal/metal/chrome fully electronic control switching built-in

• NR-ON/OFF, Dolby B/C, MPX ON/OFF fully electronic control switching built-in

• Reduction of the number of pins by transfered serial data to electronic volume control switching and another control switching (Controllable from micro-controller directly)

• Small the number of external parts

Functions

• REC equalizer × 2 channel

• Equalizer volume × 2 channel

• Dolby B/C NR × 2 channel

• REC/PB input electronic volume × 2 channel

• Level Meter × 2 channel

• DAC for adjusting bias × 2 channel