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參數(shù)資料
| 型號： | CXA1202R |
| 廠商： | Sony Corporation |
| 英文描述： | 2.5-V Integrated Reference Circuit 8-SOIC -40 to 85 |
| 中文描述： | 承包/鉛放大器錄像機(jī) |
| 文件頁數(shù)： | 21/26頁 |
| 文件大小： | 427K |
| 代理商： | CXA1202R |
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– 21 –
CXA1202Q-Z/CXA1202R
Precautions
1. Do not connect parasite capacitance to REC AMP dumping.
Time constant: t = C
×
(R1//R2)
C: over 150pF
R1, R2: 5
×
= 1.2 to 2.0V
Oscillations may occur unless this condition is satisfied.
R2
R1 + R2
15
C
R2
R1
V
CC
DOC TC
Frequency
Effect of C
1
Effect of C
2
R
C
1
C
1
C
2
25
28
REC AMP
2. Do not bring Head AMP input near PB output.
Normally, there is a gain of 67dB between Head Amp input (Pins 29, 30) and RFOUT (Pin 16). During no
signal, the gain is 74dB (as AGC reaches maximum gain). Bringing those closer on the pattern may cause
oscillations in the vicinity of 6 to 7MHz.
3. Use 150k
for RF AGC time constant, Resistance
Because a change in this R causes a change in the AGC output level, change the time constant using the
value of capacitance.
4. Watch the time constant of dropout detection.
5. Take AFM PB output from V RF OUT (Pin 20)
Passing AFM signal through RF AGC causes AGC to reach maximum gain when playing back a virgin tape.
As a result MUTE may not apply to AFM IC (CX20137, CX20037).
6. Adjust tape path by mixing V RE OUT signal and PCM RF OUT signal. In the absence of a signal before
switching, observe the envelope comprising the combination of the VIDEO area and the PCM area by
mixing outputs from V RF OUT (Pin 20) and PCM RF OUT (Pin 8).
RF SWP
V RF OUT
PCM RF OUT
After mixing
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| CXA1204Q | 2.5-V Integrated Reference Circuit 3-TO-92 -40 to 85 |
| CXA1207 | 8 mm VCR LUMINANCE SIGNAL PROCESSING |
| CXA1207AQ | 2.5-V Integrated Reference Circuit 3-TO-92 -40 to 85 |
| CXA1207AR | 2.5-V Integrated Reference Circuit 8-TSSOP -40 to 85 |
| CXA1208Q | 2.5-V Integrated Reference Circuit 8-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| CXA1203 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:8 mm VCR PAL JOG |
| CXA1203M | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:8 mm VCR PAL JOG |
| CXA1203M/N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8mm VCR PAL JOG |
| CXA1203N | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:8 mm VCR PAL JOG |
| CXA1204Q | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:ATF FOR 8mm VTR |
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