ba3304f ROHM Co. Ltd., ba3304f Datasheet - Page 2

• Manufacturer Part Number: ba3304f
• Description: Dual Preamplifier
• Manufacturer: ROHM Co. Ltd.

FAbsolute maximum ratings (Ta = 25_C)
FInternal circuit configuration
FElectrical characteristics (unless otherwise noted, Ta = 25_C, V
Audio ICs
FDescription of circuit (see Fig. 1)
As shown in the equivalent circuit for the BA3304 in Fig.
1, the first stage is a differential amplifier. This gives good
stability with respect to temperature and supply voltage
variation, and improves resistance to earth and power
supply noise.
The second stage uses Darlington pairs to increase the
input impedance and the gain of the first stage. The out-
put is an emitter follower which suppresses deterioration
of the linearity due to the influence of the equalizer termi-
nal, and prevents drop in maximum output.
CC
= 3V, f= 1kHz and R
L
= 10 )
BA3304F
179