參數(shù)資料
型號: 73M1822-KEYCHN
廠商: Maxim Integrated Products
文件頁數(shù): 48/82頁
文件大?。?/td> 0K
描述: BOARD KEYCHAIN 73M1822 42-QFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 1
主要目的: *
嵌入式: *
已用 IC / 零件: *
主要屬性: *
次要屬性: *
已供物品: 板,CD
73M1822/73M1922 Data Sheet
DS_1x22_017
52
Rev. 1.6
9
Signal Processing
9.1
Transmit Path Signal Processing
9.1.1
General Description
In the transmit path, data is first sent by the host DSP through a serial interface to the 73M1822 / 73M1922
then interpolated by a transmit interpolation filter, serialized and transmitted across to the Line-Side Device,
which is floating relative to the Host-Side Device earth ground. The data received on the Line-Side Device
is then de-serialized and digitally sigma-delta modulated to a one-bit data stream of 1.536 Mbps (for a
sample frequency of 8 kHz). The signal is further filtered first by a switched capacitor filter and then a
continuous anti-aliasing circuit.
The frequency response and bandwidth of the transmit path is dependent on the sampling frequency (Fs).
Figure 22 and Figure 23 show the normalized frequency response of the transmit path. For Fs = 8 kHz, the
0.2 dB pass-band ripple frequency is from DC to 3.422 kHz. The 3 dB bandwidth is 3.65 kHz.
9.1.2
Total Transmit Path Response
0
1
2
3
4
5
6
7
8
100
90
80
70
60
50
40
30
20
10
0
10
Trans mit Path Overall Frequency Res pons e
Freq(kHz)
G
ai
n(dB)
10
100
comp osite x
( )
8
0
x 16
com
iplo
xou
Figure 25: Transmit Path Overall Frequency Response to Fs (8 kHz)
0
0.5
1
1.5
2
2.5
3
3.5
4
1
0.8
0.6
0.4
0.2
0
0.2
0.4
0.6
0.8
1
Trans mit Pas s band Res pons e
Freq(kHz)
G
ai
n(dB)
1.
1.0
comp osite x
( )
4
0
x 16
Figure 26: Pass-Band Response of the Transmit Path
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