参数资料
型号: 74HC7046APW
厂商: NXP SEMICONDUCTORS
元件分类: PLL合成/DDS/VCOs
英文描述: PHASE LOCKED LOOP, PDSO16
封装: PLASTIC, TSSOP
文件页数: 31/38页
文件大小: 468K
代理商: 74HC7046APW
December 1990
37
Philips Semiconductors
Product specication
Phase-locked-loop with lock detector
74HC/HCT7046A
Note
For an extensive description and application example please refer to application note ordering number
9398 649 90011.
Also available a computer design program for PLL’s ordering number 9398 961 10061.
Since the output frequency is proportional to the VCO control voltage, the PLL frequency response can be observed with
an oscilloscope by monitoring pin 9 of the VCO. The average frequency response, as calculated by the Laplace method,
is found experimentally by smoothing this voltage at pin 9 with a simple RC filter, whose time constant is long compared
to the phase detector sampling rate but short compared to the PLL response time.
Fig.34 Frequency synthesizer.
Fig.35 Type 1, second order frequency step response.
01
2
4
1.6
1.0
0.6
0
0.8
MGA959
3
1.4
1.2
0.4
0.2
56
7
8
ω nt
ω (t)
e
ωe n
Φ (t)
e
Φe n
0.6
0
0.4
1.0
0.2
0.4
0.2
0.6
0.8
= 5.0
ζ
0.5
0.707
1.0
= 0.3
ζ
= 2.0
ζ
相关PDF资料
PDF描述
74HCT7046ADB-T PHASE LOCKED LOOP, PDSO16
74HC7046APW-T PHASE LOCKED LOOP, PDSO16
74HCT7046ADB PHASE LOCKED LOOP, PDSO16
74HCT7046APW-T PHASE LOCKED LOOP, PDSO16
74HCT9046AP PHASE LOCKED LOOP, PDIP16
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