参数资料
型号: CRYSTAL
英文描述: Crystal Oscillators (73k)
中文描述: 晶体振荡器(73K号)
文件页数: 1/4页
文件大小: 73K
代理商: CRYSTAL
1
www.semtech.com
HIGH-PERFORMANCE PRODUCTS
Revision 1/ November 27, 2001
AN1007
Crystal Oscillators
Figure 1: Overtone Crystal Oscillator
VCC
VEE
Y1
C2
L1
C1
20pF
R1
510
R4
50
C3
0.001
μ
F
1
2
4
5
6
7
8
Qm
VCC
D
D*
VBB
Q
Q*
VEE
SK10/100EL16B
R2
510
R3
510
L2
0.1
μ
F
C5
22
μ
F
+
J1
J2
C4
3
Voltage Controlled and Overtone Crystal Oscillators
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1
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Table 1
Crystal oscillators are used to provide reference fre-
quency clocks for applications such as SONET, Gi-
gabit Ethernet, or fiber channel. Crystal oscillator
manufacturers can design oscillators with accurate
signal waveforms of ±10 ppm or better of the refer-
ence frequency. In this application note only ex-
amples of overtone and voltage controlled crystal
oscillators are provided in figures 1, 2, 3, and 4,
respectively.
These reference clocks can also be obtained with
a PLL based IC devices. Some of the most popular
reference frequencies are 155.52 MHz (OC-3) and
622.08 MHz (OC-12) which can be obtained using
Semtech’s PLL based devices mentioned in Table
1.
相关PDF资料
PDF描述
CS-1009XD8 Voltage Reference
CS-1009XZ Voltage Reference
CS-101A
CS-102
CS-102-1
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