參數(shù)資料
型號: TDA5251F1
廠商: INFINEON TECHNOLOGIES AG
英文描述: ASK/FSK 315MHz Wireless Transceiver
中文描述: 詢價/ FSK信號315MHz的無線收發(fā)器
文件頁數(shù): 59/88頁
文件大?。?/td> 2086K
代理商: TDA5251F1
TDA5251 F1
Version 1.0
Application
Preliminary Specification
59
2003-02-18
Confidential
3.5
Limiter and RSSI
The I/Q Limiters are DC coupled multistage amplifiers with offset-compensating feedback circuit
and an overall gain of approximately 80dB each in the frequency range of 100Hz up to 350kHz.
Receive Signal Strength Indicator (RSSI) generators are included in both limiters which produce DC
voltages that are directly proportional to the input signal level in the respective channels. The
resulting I- and Q-channel RSSI-signals are summed to the nominal RSSI signal.
limiter input.wmf
Figure 3-20
Limiter and Pinning
Table 3-10
D7
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
3dB cutoff frequencies Data Filter
D6
D5
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
D4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
nominal f
-3dB
in kHz
5
7 (default)
9
11
14
18
23
28
32
39
49
55
64
73
86
102
38
C
37
36
35
34
33
32
31
C
C
C
C
C
C
C
I- Filter
fg
Q- Filter
fg
C
c
C
c
C
c
C
c
Q
Limiter
Limiter
I
SUM
RSSI
29
C
RSSI
Quadr.
Corr.
Quadr.
Corr.
37k
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