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參數(shù)資料
| 型號： | TEA2028-TEA2029 |
| 廠商： | 意法半導體 |
| 英文描述： | APPLICATION NOTE |
| 中文描述： | 應用筆記 |
| 文件頁數(shù)： | 14/47頁 |
| 文件大小： | 532K |
| 代理商： | TEA2028-TEA2029 |
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0
-200
40
80
120
160
200
20
30
40
Φ
V
OUT
/
V
IN
(Degrees)
-150
-100
-50
0
50
100
V
C
(mV)
A
A
V
IN
V
18
(dB)
20 log
2
Figure24
E - CHARACTERISTICS OF THE NON-LINEAR
AMPLIFIER ”A4” (see Figures25 and 26)
This is a differential amplifier whose equivalent
feed-backresistors ofemittersvary asafunctionof
its input voltage.
The maximum output voltage swing is set by two
”clamp” diodes connectedto ”V
22
” input.
F - VOLTAGE-FREQUENCYTRANSFER
CHARACTERISTICS OF V
CO
(see Figure27)
The transfercharacteristicislinear andcenteredat
5.6V at 500kHz operating frequency.
T
transfer
=
f
five divide-by-twostages : T =22.4
32
= 0.7kHz/V
-150
-100
-50
0
50
100
5
5.5
6
6.5
7
V
(mV)
C
22
V
(V)
A = 25mV/V
A = 50mV/V
A =
300mV/V
2
Figure 25 :
V
C
= F(V
22
)
0.7
0.6
0.5
0.4
5
5.6
6
6.5
I
(
μ
A)
22
V
(V)
22
= 33M
dV
22
di
22
= 500k
dV
22
di
22
= 820k
dV
22
di
22
2
Figure 26 :
I
22
= F(V
22
)
480
500
520
4
5
6
7
P
518kHz
T = 22.4kHz/V
Pin 22 VOLTAGE ” V
22
” (V)
2
Figure 27
V. 3.4. - ”
φ
1” Timeconstant switching
When switching between stations or receiving sig-
nal via a VCR, the loop locking intervalmust be as
short as possibleso as to avoid unwanted visible
effectonthe picture.In fact, sincethe synchroniza-
tion between the VCR motor drive and the play-
back head is rather imperfect, it will produce
frequency and phase fluctuations in the output
composite video signal. Under these conditions,
phaselockingintervalmustbe”short” (VCRMode).
In the case of broadcast transmission, this loop
must also filter all phase variations produced by
noisy sync signal. In this case, its locking time
constantmust be ”long”(normal mode).
In other ”jungle” circuits, thistime constantswitch-
ing is carriedout by capacitor switching within the
filterloop. In our case, this function is achieved by
changingthe currentamplitude of the phasecom-
parator.
TEA2028 - TEA2029APPLICATIONNOTE
14/46
相關PDF資料 |
PDF描述 |
|---|---|
| TEA2028 | APPLICATION NOTE |
| TEA2028B | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2128 | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2164S | SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT |
| TEA2029C | COLOR TV SCANNING AND POWER SUPPLY PROCESSOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TEA2029 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:APPLICATION NOTE |
| TEA2029C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:COLOR TV SCANNING AND POWER SUPPLY PROCESSOR |
| TEA2029CV | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Timing Processor (LINE, FRAME, SMPS) for TV Sets |
| TEA2031A | 功能描述:視頻 IC East/West Correction RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TEA2031A_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:COLOR TV EAST-WEST CORRECTION |
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