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參數(shù)資料
| 型號： | TLC32046M |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Wide-Band Analog Interface Circuit |
| 中文描述： | 寬帶模擬接口電路 |
| 文件頁數(shù)： | 29/57頁 |
| 文件大?。?/td> | 297K |
| 代理商： | TLC32046M |
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Error = 20 log
f = 3000 Hz
sin
π
f/fs
π
f/fs
2–15
Table 2–5. (sin x)/x Roll-Off Error
fs (Hz)
(dB)
–2.64
7200
8000
–2.11
9600
–1.44
14400
–0.63
16000
–0.50
19200
–0.35
25000
–0.21
The actual AIC (sin x)/x roll-off is slightly less than the figures in Table 2–5 because the AIC has less than
100% duty cycle hold interval.
2.27 Correction Filter
To externally compensate for the (sin x)/x roll-off of the AIC, a first-order correction filter can be implemented
as shown in Figure 2–8.
+
u (i + 1)
X
y(i + 1)
p1
+
(1 – p1) p2
Z – 1
X
Σ
Figure 2–8. First-Order Correction Filter
The difference equation for this correction filter is:
(4)
y
(i + 1)
= p2
(1 – p1)
u
(i + 1)
+ p1
y
(i)
where the constant p1 determines the pole locations.
The resulting squared magnitude transfer function is:
|
H (f)
|
2
=
(p2)
2
V
(1–p1)
2
1–2
V
p1
V
cos (2
p
f/f
s
) + (p1)
2
(5)
2.28 Correction Results
Table 2-6 shows the optimum p values and the corresponding correction results for 8000-Hz and 9600-Hz
sampling rates (see Figures 5–8, 5–9, and 5–10).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLC32047 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit |
| TLC32047C | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit |
| TLC32047CFN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit |
| TLC32047CN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit |
| TLC32047I | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide-Band Analog Interface Circuit |
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