- 您现在的位置：买卖IC网 > PDF目录67595 > G1432 (Global Mixed-mode Technology Inc.) 2W Stereo Audio Amplifier PDF资料下载
参数资料
| 型号： | G1432 |
| 厂商： | Global Mixed-mode Technology Inc. |
| 元件分类： | 音频放大器 |
| 英文描述： | 2W Stereo Audio Amplifier |
| 中文描述： | 2W立体声音频放大器 |
| 文件页数： | 5/15页 |
| 文件大小： | 340K |
| 代理商： | G1432 |
Ver: 1.1
Jun 21, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
13
G1432
Global Mixed-mode Technology Inc.
Optimizing DEPOP Operation
Circuitry has been implemented in the G1432 to
minimize the amount of popping heard at power-up
and when coming out of shutdown mode. Popping
occurs whenever a voltage step is applied to the
speaker and making the differential voltage gener-
ated at the two ends of the speaker. To avoid the
popping heard, the bypass capacitor should be
chosen promptly, 1/(CBx100kΩ) ≦ 1/(CI*(RI+RF)).
Where 100k
Ω is the output impedance of the
mid-rail generator, CB is the mid-rail bypass ca-
pacitor, CI is the input coupling capacitor, RI is the
input impedance, RF is the gain setting impedance
which is on the feedback path. CB is the most im-
portant capacitor. Besides it is used to reduce the
popping, CB can also determine the rate at which
the amplifier starts up during startup or recovery
from shutdown mode.
De-popping circuitry of the G1432 is shown on Fig-
ure B. The PNP transistor limits the voltage drop
across the 50k
Ω by slewing the internal node slowly
when power is applied. At start-up, the voltage 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 charg-
ing is slower. This appears as a linear ramp (while
the PNP transistor is conducting), followed by the
expected exponential ramp of an R-C circuit.
Bypass
VDD
100 k
Ω
100 k
Ω
50 k
Ω
Figure B
Bypass
VDD
100 k
Ω
100 k
Ω
50 k
Ω
Figure B
相关PDF资料 |
PDF描述 |
|---|---|
| G218BR-D3F | Ultra160 Multi-mode LVD/SE SCSI Terminator |
| G218BR-D3 | Ultra160 Multi-mode LVD/SE SCSI Terminator |
| G218BR-S4F | Ultra160 Multi-mode LVD/SE SCSI Terminator |
| G218BR-S4 | Ultra160 Multi-mode LVD/SE SCSI Terminator |
| G218BR-S5F | Ultra160 Multi-mode LVD/SE SCSI Terminator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| G1432F3U | 制造商:GMT 制造商全称:Global Mixed-mode Technology Inc 功能描述:2W Stereo Audio Amplifier |
| G1432Q5U | 制造商:GMT 制造商全称:Global Mixed-mode Technology Inc 功能描述:2W Stereo Audio Amplifier |
| G143A1 | 制造商:Glenair Inc 功能描述:ADAPTER MICRO-D - Bulk |
| G143B1 | 制造商:Glenair Inc 功能描述:ADAPTER MICRO-D - Bulk |
| G143B3C | 制造商:Glenair Inc 功能描述:ADAPTER MICRO-D - Bulk |
发布紧急采购，3分钟左右您将得到回复。