ba3430f ROHM Co. Ltd., ba3430f Datasheet - Page 6

• Manufacturer Part Number: ba3430f
• Description: Stereo Pre-amplifiers With Mute Detection Circuits For Car Stereos
• Manufacturer: ROHM Co. Ltd.

(2)
The signal input from the magnetic head will be amplified
based on the NAB characteristics for normal tape or met-
al tape. The equalizer characteristics are switched be-
tween normal and metal according to the logic of the met-
al switch pin. A 22k or less resistor must be connected
Equivalent circuit schematic
(3)
This circuit mutes the output of the equalizer amplifier. A
22k or less resistor must be connected to the input pin
to limit the input current. The electrolytic capacitor be-
tween the input pin and ground is for preventing switch
noise. It can be omitted without causing incorrect song
detection, however, it is best to use it to ensure proper op-
eration of the mute circuit.
Input switch truth table
274
Audio ICs
Equalizer amplifier and metal switch circuits
Mute circuit
to the input pin to limit the input current. The capacitor be-
tween the input pin and ground is for preventing switch
noise. It can be omitted without causing incorrect song
detection.
Input switch truth table
Equivalent circuit schematic
BA3430S / BA3430F / BA3430FS