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參數(shù)資料
| 型號(hào)： | TDA7284 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Record/PLAYBACK CIRCUIT WITH ALC(帶ALC的錄音/回放電路) |
| 中文描述： | 記錄/回放電路（帶ALC的的錄音/回放電路下，ALC） |
| 文件頁(yè)數(shù)： | 10/14頁(yè) |
| 文件大?。?/td> | 152K |
| 代理商： | TDA7284 |
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peak-to-peakdetector of fig. 16 is now inside the
broken line 1 while the system which allows a di-
namic resistance varying with the DC voltage
level (i.e. inversely proportional to the op-amp
output signal),isinside the brokenline 2.
It should be noted that the generator resistance
Ri
has no influence on the controlled voltage
value Vc, although its value should be between 1
and 47 Kohm.
The lower limit is determined by the minimum dy-
namic resistance
of 10 ohm and therefore to
have a controlrange of 40 dB for the input signal,
Ri mustbe greatherthan 1.5 Kohm.
The upper limit results from the necessity to limit
the attenuation of the signal by the input imped-
ance of the op-amp.
Switches
Two DC-controlled switches are also included in
the chip (fig. 20 )
Fig. 19 shows the typical application circuit of the
TDA7284 utilizing the equalization switch for nor-
mal or chrome tape playback equalization.The
advantage is the components can be placed near
to the IC, while the tape selector switch can be at
a remote location, hence reduce the chances of
noise and oscillation due to components layout.
Another advantage is that only one pole is
needed for the tape selector switch as compared
to the two poles needed by conventional circuits
(one separatepole for each channel).
Fig. 22 shows the use of the switches to obtain
the mute function.
Figure20
Figure 21:
ApplicationCircuitwith DC Switchingof Normal/Chrome TapeEqualization
TDA7284
10/14
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| TDA7285D | STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER |
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| TDA7286D | SINGLE CHIP PREAMPLIFIER FOR DOUBLE DECK RADIO CASSETTE RECORDER |
| TDA7286 | Single Chip Preamplifier For Double Deck Radio Cassette Recorder(應(yīng)用于雙面磁盤錄音機(jī)的單芯片前置放大器) |
| TDA7293HS | 120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7284D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:RECORD/PLAYBACK CIRCUIT WITH ALC |
| TDA7285 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER |
| TDA7285D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER |
| TDA7286 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SINGLE CHIP PREAMPLIFIER FOR DOUBLE DECK RADIO CASSETTE RECORDER |
| TDA7286D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SINGLE CHIP PREAMPLIFIER FOR DOUBLE DECK RADIO CASSETTE RECORDER |
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