最新免费av在线观看,亚洲综合一区成人在线,中文字幕精品无码一区二区三区,中文人妻av高清一区二区,中文字幕乱偷无码av先锋

G1428F31U Datasheet

  • G1428F31U

  • 2W Stereo Audio Amplifier

  • 339.02KB

  • 16頁

  • GMT

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

Global Mixed-mode Technology Inc.
Where 170k惟 is the output impedance of the
mid-rail generator, C
B
is the mid-rail bypass ca-
pacitor, C
I
is the input coupling capacitor, R
I
is the
input impedance, R
F
is the gain setting impedance
which is on the feedback path. C
B
is the most im-
portant capacitor. Besides it is used to reduce the
popping, C
B
can also determine the rate at which
the amplifier starts up during startup or recovery
from shutdown mode.
De-popping circuitry of G1428 is shown as below
Figure 2. The PNP transistor limits the voltage drop
across the 120k惟 by slewing the internal node
slowly when power is applied. At start-up, the volt-
age at BYPASS capacitor is 0. The PNP is ON to
pull the mid-point of the bias circuit down. So the
capacitor sees a lower effective voltage, and thus
the charging is slower. This appears as a linear
ramp (while the PNP transistor is conducting), fol-
lowed by the expected exponential ramp of an R-C
circuit.
For better performance, C
B
is recommended to be
at least 1.5 times of input coupling capacitor C
I
. For
example, if using 1uF input coupling capacitor,
2.2
碌
F ceramic or tantalum low-ESR capacitors are
recommended to achieve the better THD perform-
ance.
VDD
100 k惟
120 k惟
Bypass
100 k惟
-3 dB
G1428
Output coupling capacitor
G1428 can drive clean, low distortion SE output power
with gain 鈥?V/V into headphone loads (generally 16惟
or 32惟) as in Figure 3. Please refer to
Electrical
Characteristics
to see the performances. A coupling
capacitor is needed to block the dc-offset voltage, al-
lowing pure ac signals into headphone loads. Choos-
ing the coupling capacitor will also determine the -3dB
point of the high-pass filter network, as Figure 4.
f
C
=1/(2蟺R
L
C
C
)
For example, a 220碌F capacitor with 32惟 headphone
load would attenuate low frequency performance be-
low 22.6Hz. So the coupling capacitor should be well
chosen to achieve the excellent bass performance
when in SE mode operation.
VDD
Vo(PP)
C
C
R
L
Vo(PP)
Figure 3
f
c
Figure 2
Figure 4
Ver: 1.2
Mar 31, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
14

G1428F31U相關(guān)型號(hào)PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號(hào)推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！