datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

CX-2520SB View Datasheet(PDF) - Kyocera Kinseki Corpotation

Part Name
Description
View to exact match
CX-2520SB
KSS
Kyocera Kinseki Corpotation KSS
CX-2520SB Datasheet PDF : 27 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
Handling Notes
(4) Items calculated by equivalent constants and load capacitance
fs: Series resonance frequency
fp: Parallel resonance frequency
: Capacitance ratio
fL : Load resonance frequency
RL : Load resistance
CL : Load capacitance
Q : Quality factor
fs 2
1
L1
C1
fp
2
1
L1
C
C
0
0
C1
C1
C0
C1
fL fs
2
C1
(C0CL)
1
RL R1
1
C0
CL
2
CL
C1
2
1
(f L/f s)1
C0
Q 2fs L1
1
R1
2fs C1 R1
The equation fL shows that fL varies as load capacitance CL connected to the crystal unit changes and that fL becomes larger
as CL becomes smaller.
The equation RL shows the change in impedance with a load capacitance connected. The impedance of crystal unit becomes
larger as CL becomes smaller.
2. Oscillation circuit and crystal unit
(1) Equivalent circuit of oscillation circuit and oscillation conditions
A simplified equivalent circuit is shown below.
Crystal unit
Oscillation circuit
Crystal unit
CL
XL
R
RL
Oscillation circuit
C L = –X C
R
C L : Load capacitance
R : Negative resistance
X L : Reactance of crystal unit
X C : Reactance of oscillation circuit
R L : Load resonance resistance
- 53 -
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]