參數(shù)資料
型號: U2894B-AFSG3
英文描述: Modulation PLL for GSM, DCS and PCS Systems
中文描述: 調制鎖相環(huán)用于GSM,DCS和PCS系統(tǒng)
文件頁數(shù): 16/16頁
文件大?。?/td> 802K
代理商: U2894B-AFSG3
U2894B
Rev. A4, 30-Sep-98
9 (16)
Test Circuit
28
1
2
3
4
5
6
7
27
26
25
24
23
22
21
20
19
18
8
9
10
11
12
13
14
17
16
15
50
1 nF
50
50
50
50
50
VAC
VDC
1.35 V –VS1/2 +0.1 V
Mixer
output
V
S
Mixer
input
V
S
Mixer
LO input
PFD input
R
1
R
2
R
3
Mode control
VS2
Power–up
Bias voltage for
charge pump output:
0.5 V < VDO < VSP – 0.5 V
V
S
Modulator
LO input
Modulator
outputs
V
S
VSP
VDO
PFD
Pulse output
PFD
input
13315
Baseband input
<450 mV
pp
VAC
VDC
<450 mV
pp
Baseband input
1.35 V –VS1/2 +0.1 V
Figure 12. Test circuit
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