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參數(shù)資料
| 型號(hào)： | U2893B |
| 英文描述： | Modulation PLL for GSM, DCS and PCS Systems |
| 中文描述： | 調(diào)制鎖相環(huán)用于GSM，DCS和PCS系統(tǒng) |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 294K |
| 代理商： | U2893B |
U2893B
TELEFUNKEN Semiconductors
Rev. A1, 29-Jan-76
Preliminary Information
10 (14)
Test Circuit
50
50
R1
R2
R3
VS
VSP
VDO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
21
20
22
23
24
15
16
17
18
19
25
26
27
28
50
50
VS2
VS
50
VS
50
VS
<450 mV
50
PFD
Pulse output
1 n
Baseband inputs
Modulator
LO input
Mixer
LO input
Modulator
outputs
Mode control
Power-up
0.5 V < VDO < VSP – 0.5 V
Bias voltage for
charge pump output:
PU
VAC
VDC
1.35 V –
VS1/2 + 0.1 V
ì
ì
NI
MDLO
I
GNDP
CPC
VSP
CPO
VS1
NMDO
MDO
GND
NRD
PUMIX
RD
Q
NQ
VS3
VS2
RF
MIXO
GND
NRF
MIXLO
NND
ND
MC
GND
PFD input
<450 mV
VAC
VDC
1.35 V –
VS1/2 + 0.1 V
PFD input
Mixer
input
Mixer
output
13315
pp
pp
Figure 15. Test circuit
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