參數(shù)資料
型號: MT88E46
廠商: Zarlink Semiconductor Inc.
英文描述: Bellcore Compliant Calling Number Identification Circuit
中文描述: 貝爾通訊兼容主叫號碼識別電路
文件頁數(shù): 13/23頁
文件大?。?/td> 522K
代理商: MT88E46
Advance Information
MT88E46
13
Figure 9 - GS1 and GS2 Gain Ratios as a Function of Nominal Vdd
Gain Setting Resistor Calculation for Nominal Vdd between 3 and 5V
For the desired nominal Vdd, use Figure 9 to calculate approximate Av.
For the GS1 op-amp, start with the 0dB gain setting resistor values of R5
0dB
, R6
0dB
and R7
0dB
. In
Figure 8 they are 53K6, 60K4 and 464K respectively. Keep R1, R2, R3, R4, C1, C2 as in Figure 8 to
keep the input highpass filter corner frequency constant for all gain settings.
For the desired Av:
R7
Av
= R7
0dB
x Av
Scaled for desired gain. Choose the closest standard 1%
resistor value as R7
Av
. Calculate Av_actual as R7
Av
/R7
0dB
.
R5
Av
= R5
0dB
x Av_actual
Scaled for good common mode range. Choose the closest
standard 1% resistor as R5
Av
.
1/R6
Av
= 1/R5
Av
-1/R7
Av
Calculate R6
Av
so that R5
Av
= R6
Av
|| R7
Av
. Choose the
closest standard 1% resistor as R6
Av
.
Repeat for R10, R11 and R12 for the GS2 op-amp.
Example:
For the 3V gain of -4.0dB, Av = 0.63095.
R7
-4dB
= 0.63095 x 464K = 292.76K. The closest standard 1% resistor is 294K.
Av_actual is 294K/464K = 0.63362 or -3.96dB.
R5
-4dB
= 0.63362 x 53K6 = 33.96K. The closest standard 1% resistor is 34K0.
1/R6
-4dB
= 1/34.0K - 1/294K = 1/38.45K. The closest standard 1% resistor is 38K3.
3.0
3.5
4.0
4.5
5.0
Nominal Vdd (Volts)
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
G
0.63095
1.000
PRELIMINARY
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT88E46_06 制造商:TI 制造商全稱:Texas Instruments 功能描述:Bellcore Compliant Calling Number Identification Circuit
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MT88E46ASR 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel
MT88E46ASR1 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel