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参数资料
| 型号： | W91030BSG |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 无绳电话/电话 |
| 英文描述： | TELEPHONE CALLING NO IDENT CKT, PDSO24 |
| 封装： | 300MIL, ROHS COMPLIANT, PLASTIC, SOP-24 |
| 文件页数： | 30/32页 |
| 文件大小： | 245K |
| 代理商： | W91030BSG |
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W91030B
Publication Release Date: Sep. 27, 2005
- 7 -
Revision A2
7.2
Input Pre-processor
The input signal is processed by an Input Pre-
Processor, which is added to the offset voltage to
adjust the input amplitude and to filter out
unwanted frequencies. The gain control op-amp is
used to bias the input voltage with the VREF
signal voltage. The voltage of VREF pin is VDD/2
typically, this pin had better connected a 0.1uF
capacitor to VSS. It is also used to select the input
gain by connecting a feedback resistor between
this pin and the INN pin. Figure 7-2 shows the
necessary connections with the tip/ring line
inputs. In a single-ended configuration, the gain
control op-amp is connected as shown in Figure
7-3.
Figure 7-2 Differential Input Gain Control Circuit
Figure 7-3 Single-ended Input Gain Control Circuit
INP
INN
+
-
GCFB
R1
C1
C2
R2
R4
R3
R5
VREF
Tip
Ring
111
Differential Input Amplifier
C1 = C2
R1 = R2
R3 = (R4 R5) / (R4 +R5)
Voltage Gain
Av = R5 / R1
Input Impedance
Zin = 2
R1
2 + (1 / wC)2
0.1 uF
C
R1
R2
Input
+
-
INP
INN
GCFB
VREF
Voltage Gain
V
A
= R2 / R1
111
0.1 uF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W91031 | 制造商:WINBOND 制造商全称:Winbond 功能描述:LOW POWER CMOS INTERGRATED CIRCUIT |
| W91031S | 制造商:WINBOND 制造商全称:Winbond 功能描述:Calling Line Identifier |
| W91031SG | 功能描述:IC CALL LINE IDENT 24-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:* |
| W91031SG (SA5825) TR | 制造商:Nuvoton Technology Corp 功能描述:FSK DECORDER WITH CALL ON WAIT |
| W91031SG T&R | 制造商:Nuvoton Technology Corp 功能描述:IC CALL LINE IDENT 24-SOIC |
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