- 您现在的位置：买卖IC网 > PDF目录10990 > LT1684IN#PBF (Linear Technology)IC RING TONE GENERATOR 14-DIP PDF资料下载
参数资料
| 型号： | LT1684IN#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | IC RING TONE GENERATOR 14-DIP |
| 标准包装： | 25 |
| 功能： | 音频发生器 |
| 电路数： | 1 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 14-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 14-PDIP |
| 包装： | 管件 |
9
LT1684
For applications that are extremely output ripple sensitive,
additional carrier rejection can be accomplished by modi-
fying the output filter/amplifier characteristics such as
implementing elliptical filter characteristics with a lower
cutoff frequency or implementation of additional poles.
Filter Design and Component Selection
The ring tone information represented in the low fre-
quency component of the input PWM signal is retrieved
using an active filter. This filter also generates the appro-
priate low frequency gain required to produce the high
voltage output signal and references the output to ground
(or other system reference). The frequency and gain
characteristics of this circuit element are both configurable
by the appropriate choice of external passive filter ele-
ments. Because of the active tracking supply mode of
operation, conventional active filter topologies cannot be
used. Most amplifier/filter topologies can, however, be
“transformed” into active tracking supply topologies.
A conventional amplifier circuit topology can be “trans-
formed” into an active tracking supply amplifier circuit by:
a) Inverting the amplifier signal polarity (swap amplifier +
and – connections) and input source polarity.
b) Referencing all signals to the output except the feed-
back elements, which are referenced to ground (swap
output and ground).
A variety of amplifier/filter configurations can be realized
using the transformation technique. A 2-pole filter is
generally adequate for most ringer applications. Due to the
relative simplicity of infinite-gain Multiple Feedback (MFB)
configurations, these filters are good candidates for ringer
applications. Component selection and active tracking
supply transformation will be described for the following
2-pole MFB infinite-gain lowpass filter.
–
+
VIN
–
R1
R2
LOAD
–
+
VIN
–
R1
TRANSFORMATION
Conventional Amplifier Configuration
Active Tracking Supply Amplifier
Lowpass Mulitple Feedback Active Filter
Active Tracking Supply Lowpass
Multiple Feedback Filter
R2
LOAD
TRANSFORMATION
–
+
VIN
–
R1
R3
C1
LOAD
C2
R2
–
+
R3
R1
1684 F01
LOAD
C2
C1
R2
+
VIN
–
APPLICATIO S I FOR ATIO
WU
UU
相关PDF资料 |
PDF描述 |
|---|---|
| MC908QB4MDWE | IC MCU 8BIT 4K FLASH 16-SOIC |
| MC9S08AW48CFUER | IC MCU 48K FLASH 64-QFP |
| MC9S08JE128VLK | IC MCU 8BIT 128K FLASH 80LQFP |
| MCF51QE96CLK | IC MCU 32BIT 96K FLASH 80-LQFP |
| VI-B4H-IY-F3 | CONVERTER MOD DC/DC 52V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1684IS | 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684IS#PBF | 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684IS#TR | 功能描述:IC GENERATOR RING TONE 14SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684IS#TRPBF | 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT-16C | 制造商:Thomas & Betts 功能描述: |
发布紧急采购，3分钟左右您将得到回复。