參數資料
型號: HCT9046
廠商: NXP Semiconductors N.V.
英文描述: PLL with bandgap controlled VCO
中文描述: 鎖相環(huán)控制VCO的帶隙
文件頁數: 24/40頁
文件大?。?/td> 240K
代理商: HCT9046
1999 Jan 11
24
Philips Semiconductors
Product specification
PLL with bandgap controlled VCO
74HCT9046A
Fig.24 Definition of VCO frequency linearity:
V = 0.5 V over the V
CC
range.
MGA937 - 1
f
max
f1
min
1/2VCC
f'c
fc
f2
VVCOIN
V
V
f
c
f
------2
f
2
+
=
linearity
f
------f
f
c
c
100%
×
=
Fig.25 Frequency linearity as a function of R1, C1
and V
CC
.
4
4
0
1
MBD114
10
10
2
10
3
8
fVCO
(%)
R1 (k
)
C1 = 1
μ
F
4.5 V
5.5 V
C1 =
39 pF
4.5 V
5.5 V
R2 =
and
V = 0.5 V.
Fig.26 Power dissipation as a function of
component values.
300
0
100
MBD121
10
1
1
200
10
2
R1 (k
)
4.5 V
C1 = 1
μ
F
5.5 V
C1 = 39 pF
4.5 V
C1 = 39 pF
5.5 V
C1 = 1
μ
F
VCC
PD
(W)
R2 =
.
Fig.27 Power dissipation as a function of
component values.
R1 =
.
300
0
100
MBD110
10
1
1
200
10
2
R2 (k
)
P
(W)
5.5 V
C1 = 39 pF
5.5 V
4.5 V
C1 = 1
μ
F
4.5 V
C1 = 39 pF
VCC
D
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