L64704 LSI Logic Corporation, L64704 Datasheet - Page 215

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

C.5
Low Frequency
Oscillation
(kHz Range)
Figure C.4
A Low Frequency
Range (kHz)
Oscillator Circuit
Table C.3
Component Values
for the Circuit
Shown in
Figure C.4
C
A circuit that can be used to reliably obtain a lower frequency oscillation
is shown in
range of frequencies.
1. R
For the capacitors:
where C
tion capacitance (typically 3 pF).
The basis for the values in
where f
itself).
Frequency
20 kHz
50 kHz
75 kHz
100 kHz
Low Frequency Oscillation (kHz Range)
f
F
1
R
1 to 5 Meg ohms.
C
DC
=
DC
1
1
Crystal
C
= the DC resistance of the crystal. R
F
2
L
2 R
OSCIK
is the desired frequency of oscillation (shown on the crystal
=
= Crystal Parameter (typically 32 pF) and C
Figure
2 C
2
C
61
61
61
61
2
C
(pF)
L
2
C.4. This circuit should be used for the 0 to 100 kHz
R
C
–
2
2
C
B
R
100
40
25
15
2
(k )
Table C.3
DC
comes from the relationship:
should be in the range from
B
= board connec-
C-5