參數(shù)資料
型號: LUCW3020CCS-DB
英文描述: GSM Multiband RF Transceiver
中文描述: 手機(jī)多頻段射頻收發(fā)器
文件頁數(shù): 29/44頁
文件大?。?/td> 409K
代理商: LUCW3020CCS-DB
Advance Data Sheet
December 1999
W3020 GSM Multiband RF Transceiver
Lucent Technologies Inc.
29
Programming Information
(continued
)
CONFIG Register
(continued)
Table 38. C3: Receive LO1 Buffer Mode During dc Calibration
C3
Bit 9
0
Function
RX LO1 Buffer Off During dc Offset Calibration
1
RX LO1 Buffer On During dc Offset Calibration
Table 39. C2: LNA Mode During dc Calibration
C2
Bit 8
0
1
Function
LNA Off During dc Offset Calibration*
LNA On During dc Offset Calibration
*Recommended to meet GSM sensitivity requirement.
Table 40. C1: 540 MHz LO2 Phase Detector Polarity
C1
Bit 7
Function
See Figure 10.)
0
1
Negative Charge Pump Polarity (VCO2 Frequency Decrease with CP2 Voltage)
Positive Charge Pump Polarity (VCO2 Frequency Increase with CP2 Voltage)
LOOP FILTER
REFERENCE
W3020
PLL
540 MHz VCO
VCO OUTPUT
FREQUENCY
C1 STATE = 1
C1 STATE = 0
VCO INPUT CONTROL
VOLTAGE
Figure 10. Programming the LO2 Phase Detector Slope
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