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參數(shù)資料
| 型號： | LA3246 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 音頻放大器 |
| 英文描述： | Stereo Preamplifier for Compact Double Cassette Playback-only Use |
| 中文描述： | 立體聲放大器的緊湊型雙卡式播放，僅使用 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大小： | 441K |
| 代理商： | LA3246 |
(3) When an electrolytic capacitor is connected to input pins 1, 2 (or 23, 24), make the value of R
IN
1 as equal to that of R
IN
2 as
possible.
The difference in the value between R
IN
1 and R
IN
2 causes the variation in amp output DC voltage at the time of F/R
switching. Therefore, the input DC voltage (voltage across R
IN
) must be made as equal as possible.
(4) The amplifier output characteristics are designed to be the same in the Nor Tape/High Speed (pin 15 GND/pin 6 V
CC
) and
Me Tape/Nor Speed (pin 15 V
CC
/pin 6 GND) modes. (Refer to sample application circuit, external constants.)
(5) When externally turning ON/OFF power supply pin 11 (by bringing pin 11 to +V
CC
/GND level) with a capacitor connected
to pin 13, connect external diode D, as shown below, so that no breakdown (or deterioration) of the IC system is caused by
I
CD
when the switch is turned OFF. When no capacitor is connected to pin 13, diode D is not required.
(6) The output MIX circuit is of the emitter follower configuration as shown below.
The MIX OUT output level V
O
MIX at the time a signal is applied to preamp1 (or preamp2) only is 1/2 as compared with
output levels V
O
1, V
O
2 at the time the same input signal is applied to both channels.
V
O
MIX = 1/2
V
O
1(= 1/2
×
V
O
2)
where V
O
1 = V
O
2
Unit (resistance:
)
LA3246
No.2651-5/13
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