參數(shù)資料
型號(hào)： TLC32044MFK
廠商： Texas Instruments, Inc.
英文描述： VOICE-BAND ANALOG INTERFACE CIRCUITS
中文描述： 語音頻帶模擬接口電路
文件頁數(shù)： 29/39頁
文件大?。?/td> 535K
代理商： TLC32044MFK
sin
π
/fs
π
/fs
3000 H )
(f = 3000 Hz)
(dB)
TLC32044C, TLC32044E, TLC32044I, TLC32044M TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
29
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
(sin x)/x roll-off for a zero-order hold function
The (sin x)/x roll-off for the AIC DAC zero-order hold function at a band-edge frequency of 3000 Hz for the
various sampling rates is shown in the table below.
Table 4.
(sin x)/x Roll-Off
20 log
f (Hz)
fs (Hz)
7200
–2.64
8000
–2.11
9600
–1.44
14400
–0.63
19200
–0.35
The actual AIC (sin x)/x roll-off will be slightly less than the above figures because the AIC has less than a 100%
duty cycle hold interval.
correction filter
To compensate for the (sin x)/x roll-off of the AIC, a first-order correction filter (shown below) is recommended.
u(i + 1)
(1 – p1)P2
+
+
z – 1
y(i + 1)
p1
The difference equation for this correction filter is:
yi + 1 = p2(1 –p1) (u
i
+ 1
) + p1 yi
where the constant p1 determines the pole locations.
The resulting squared magnitude transfer function is:
p22(1–p1)2
1 – 2p1 cos(2
f fs)
p12
|H(f)|2
相關(guān)PDF資料
PDF描述
TLC32045C VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32045I VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32046C Wide-Band Analog Interface Circuit
TLC32046I Wide-Band Analog Interface Circuit
TLC32046M Wide-Band Analog Interface Circuit
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLC32044MFK/B 制造商:Rochester Electronics LLC 功能描述:
TLC32044MFKB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Linear CODEC
TLC32044MJ 制造商:TI 制造商全稱:Texas Instruments 功能描述:VOICE-BAND ANALOG INTERFACE CIRCUITS
TLC32044MJB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Linear CODEC
TLC32045C 制造商:TI 制造商全稱:Texas Instruments 功能描述:VOICE-BAND ANALOG INTERFACE CIRCUITS
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