參數(shù)資料
型號: KESRX05QP1T
廠商: Zarlink Semiconductor Inc.
英文描述: 260 to 470MHz ASK Receiver with Power Down
中文描述: 260至470MHz ASK接收機的斷電
文件頁數(shù): 17/28頁
文件大?。?/td> 466K
代理商: KESRX05QP1T
16
KESRX05
PEAK
DATAOP
DSN
DF2
20
DF1
21
DF0
22
R10
R11
C5
C6
C10
ANTI-JAM
CIRCUIT
AMP
A
SALLEN-KEY
DATA FILTER
SLICER
13
14
15
AMP
B
AMP
C
100k
100k
INTERNAL
REFERENCE
VOLTAGE
REF
DETB
26
RSSI
27
KESRX05
C2
RSSI
O/P
C7
L5
IFLT1
IFLT2
IFIN
3
1
28
Figure 10 Anti-jam circuit and data filter. Component idents refer to Figure 25, Figure 26 and Table 5.
Sallen and Key Filter Components
Cut-off frequency =
f
C
, therefore
v
C
= 2
p
f
C
Y
C5 =2
Q
R
v
C
C6 =
1
2
QR
v
C
where, for a Bessel response,
Q
= 0·557 and
Y
= 1·732
and, for a Butterworth response,
Q
= 0·71 and
Y
= 1·0.
Example
To implement a filter response with a 10kHz 3dB cut-
off frequency and with R10 = R11 = 100k
,
Bessel filter:
C5 = 106pF, C6 = 80pF
Butterworth filter:
C5 = 150pF, C6 = 150pF
PEAK
DATAOP
DSN
DF2
20
DF1
21
DF0
R10
R11
C5
C6
C10
ANTI-JAM
CIRCUIT
AMP
A
SALLEN-KEY
DATA FILTER
22
SLICER
13
14
15
AMP
B
AMP
C
100k
100k
INTERNAL
REFERENCE
VOLTAGE
REF
DETB
26
RSSI
27
KESRX05
C6
R6
RSSI
O/P
C7
L5
IFLT1
IFLT2
IFIN
3
1
28
Figure 11 Bypassing the anti-jam circuit (use component revisions recommended in Table 3)
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