374

Audio ICs

BA5204F

FInternal circuit configuration

FCircuit description (refer to the Internal Circuit diagram)

(1)

Preamplifier Stage

The preamplifier is comprised of the level-shift transistor

does not require a coupling capacitor.

(2)

Pre-drive stage

load.

(3)

Power stage

(4)

Idling current setting circuit

The idling current is controlled so that the difference be-

(5)

Negative-feedback circuit

The closed-circuit gain with negative feedback is deter-

nected to the NFB pin. Part of the gain setting resistance

nents.

(6)

“Pop” noise elimination circuit

The IC has an internal timing circuit (with switch for op-

eration) to reduce the “pop” noise that occurs when pow-

er is applied.