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CA3126E 데이터시트(PDF) 8 Page - Harris Corporation

부품명 CA3126E
상세설명  TV Chroma Processor
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제조업체  HARRIS [Harris Corporation]
홈페이지  http://www.harris.com
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CA3126E 데이터시트(HTML) 8 Page - Harris Corporation

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8-40
curve of the typical static phase error as a function of the free-
running oscillator frequency is shown in Figure 2. It should be
noted that the slope of the curve determines the DC gain of the
phase-locked loop, i.e., 40Hz per degree.
Thermal Considerations
The circuit of the CA3126 is thermally compensated to achieve
the optimal operating characteristics over the normal operating
temperature range of TV receivers. Figures 3 and 4 show the
oscillator and chroma-output amplitudes and phases as a func-
tion of temperature (Terminals 8 and 15), respectively.
Both the oscillator and chroma-output amplitudes and
phases are measured relative to the chroma-input phase.
The performance of the oscillator free-running frequency as
a function of temperature is shown in Figure 5. All the tem-
perature plots are characteristic of the test circuit with the
indicated component types and values given.
OSCILLATOR FREE-RUNNING FREQUENCY
300
-300
-200
-100
0
100
200
TA = 25
oC
6
400
(DEVIATION IN Hz FROM 3.579545MHz)
4
2
0
-2
-4
FIGURE 2. STATIC PHASE ERROR
TEMPERATURE (oC)
PHASE
AMPLITUDE
100
-50
-25
0
25
50
75
60
70
80
90
100
110
CHROMA INPUT = 0.25VP-P, 3.58MHz CW SIGNAL
-10
-5
0
FIGURE 3. AMPLITUDE AND PHASE VARIATIONS OF
OSCILLATOR OUTPUT vs TEMPERATURE
TEMPERATURE (oC)
PHASE
AMPLITUDE
100
-50
-25
0
25
50
75
80
90
100
110
120
130
CHROMA INPUT = 0.25VP-P,
-10
5
10
15
0
-5
-15
140
3.58MHz CW SIGNAL
FIGURE 4. AMPLITUDE AND PHASE VARIATIONS OF
CHROMA OUTPUT vs TEMPERATURE
TEMPERATURE (oC)
125
-50
-25
0
25
50
75
-150
-100
-50
0
50
100
100
CHROMA INPUT = 0VP-P
FIGURE 5. VARIATION OF OSCILLATOR FREE RUNNING
FREQUENCY vs TEMPERATURE
CA3126


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