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参数资料
| 型号： | TDA7284 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2 CHANNEL, AUDIO PREAMPLIFIER, PDIP14 |
| 封装： | DIP-14 |
| 文件页数： | 2/14页 |
| 文件大小： | 3669K |
| 代理商： | TDA7284 |
peak-to-peak detector 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),is inside the broken line 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 control range of 40 dB for the input signal,
Ri must be greather than 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 separate pole for each channel).
Fig. 22 shows the use of the switches to obtain
the mute function.
Figure 20
Figure 21: Application Circuit with DC Switching of Normal/Chrome Tape Equalization
TDA7284
10/14
相关PDF资料 |
PDF描述 |
|---|---|
| TDA7284D | 2 CHANNEL, AUDIO PREAMPLIFIER, PDSO14 |
| TDA7285 | SPECIALTY CONSUMER CIRCUIT, PDIP20 |
| TDA7285D | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| TDA7293V | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7293HS | 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7284D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RECORD/PLAYBACK CIRCUIT WITH ALC |
| TDA7285 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER |
| TDA7285D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:STEREO CASSETTE PLAYER AND MOTOR SPEED CONTROLLER |
| TDA7286 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:SINGLE CHIP PREAMPLIFIER FOR DOUBLE DECK RADIO CASSETTE RECORDER |
| TDA7286D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:SINGLE CHIP PREAMPLIFIER FOR DOUBLE DECK RADIO CASSETTE RECORDER |
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