參數(shù)資料
型號(hào): 73M1903C-IM
廠商: TERIDIAN SEMICONDUCTOR CORP
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, QCC32
封裝: LEAD FREE, QFN-32
文件頁(yè)數(shù): 14/45頁(yè)
文件大?。?/td> 459K
代理商: 73M1903C-IM
73M1903C
Modem Analog Front End
DATA SHEET
Page: 21 of 45
2005 TERIDIAN Semiconductor Corporation
Rev 3.4
Figure 9: Rx Path Passband Response
It is important to keep in mind that the receive signal should not exceed 1.16Vpk-diff for proper
performance for Rxg=11 (0dB). In particular, if the input level exceeds a value such that one’s density of
RBS exceeds 99.5%, sinc
3 filter output will exceed the maximum input range of the decimation filter and
consequently the data will be corrupted. Also for stability reasons, the receive signal should not exceed
1.16Vpk differentially. This value is set at around 65% of the full receive signal of 1.791Vpkdiff at
RXAP/RXAN pins that “would” corresponds to ASDM putting out all ones.
Figure 10 and Figure 11 show the spectrum of 1kHz tone received at RXAP/RXAN of 1.16Vpk-diff and
0.5kHz and 1.0kHz tones of 0.6Vpk-diff each, respectively for Fs=8kHz.
Note the effect of FIR
suppressing the noise above 4kHz but at the same time enhancing (in order to compensate for the
passband droop of sinc
3 filter) it near the passband edge of 4kHz.
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73M1903C-IM SPECIALTY CONSUMER CIRCUIT, QCC32
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