= 7.3

<

5

*0.6

0.6

*

5

*0.6

Ω)

0.6

Ω)

Fluorescent tube grid current

802

Audio ICs

BA6800AS

FTiming chart

(when oscillator frequency is 2kHz)

FAttached components (refer to “Circuit operation”)

justment (3k

Ω recommended).

respect to the AC input signal. In the example given, the

attack time is about 4mS and the release time is about

1sec.

the base current is given by the following formula.

grid when the fluorescent tube is not lit.

The application example given is for general cases. Se-

lect the resistors to suit the characteristics of the fluores-

cent tube used.

ture characteristics.

FOperation notes

(1)

to pins 1 and 3) to adjust the 0dB input level and the dis-

persion of ch1 and ch2.

(2)

The temperature characteristic for the lighting limit

for the 16th LED is shown in Fig. 6.

(3)

(pin 30) should be in the range of 20k

Ω and 100kΩ. If it

is outside this range, oscillation may stop due to the influ-

ence of temperature (see Fig. 7).