参数资料
型号: B900J24PXX12I
元件分类: 数字信号处理
英文描述: 0-BIT, 80 MHz, OTHER DSP, PQFP44
文件页数: 93/100页
文件大小: 1547K
代理商: B900J24PXX12I
B900
Advance Data Sheet
Baseband Signal Processor
July 1999
92
Lucent Technologies Inc.
9 Crystal Oscillator Electrical Requirements and Characteristics (continued)
9.1
Crystal Oscillator (continued)
9.1.3 Crystal Oscillator Negative Resistance Curves
Figure 25 shows worst-case negative resistance curves for a high-frequency crystal oscillator operating with a
5 V power supply (VDD = 4.5 V to 5.5 V). These worst-case conditions are as follows:
s
Maximum temperature = 120
°C
s
Minimum VDD = 4.5 V
s
Maximum CO = 7 pF
Note: VDD = 5 V.
5-6154 (F)
Figure 25. 5 V Crystal Oscillator Negative Resistance Curves
0
C1 = C2 = 2 pF
C1 = C2 = 4 pF
C1 = C2 = 6 pF
C1 = C2 = 8 pF
C1 = C2 = 10 pF
C1 = C2 = 12 pF
C1 = C2 = 14 pF
24
68
10
–240
–220
–200
–180
–160
–140
–120
–100
–80
–60
–40
FREQUENCY (MHz)
C1 = C2 = 16 pF
C1 = C2 = 20 pF
C1 = C2 = 18 pF
NEG
A
TI
VE
RE
SI
ST
AN
CE
(
)
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