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參數(shù)資料
| 型號： | CXA1597P |
| 廠商： | Sony Corporation |
| 英文描述： | Recording Equalizer Amplifier for Stereo Cassette Decks(立體聲盒式錄音機錄音均衡器) |
| 中文描述： | 錄制立體聲放大器均衡盒式橋面（立體聲盒式錄音機錄音均衡器） |
| 文件頁數(shù)： | 16/22頁 |
| 文件大?。?/td> | 296K |
| 代理商： | CXA1597P |
– 16 –
CXA1597M/P
3. Recording mute function (soft mute, fade in/out)
As described in Description of Operation, the CXA1597 recording mute function is implemented by using a
built-in recording mute circuit which varies the recording equalizer amplifier gain according to the magnitude
of the DC voltage applied to the REC MUTE pin (Pin 15) just like an electronic volume control. Consequently,
the muting time can be varied according to momentary changes of the DC voltage applied to the REC MUTE
pin (Pin 15) and, furthermore, the recording signal can be gradually attenuated without causing distortion.
The table below shows the relationship between the DC voltage applied to the REC MUTE pin (Pin 15) and
the attenuation.
Control voltage
Recording mute ON
Attenuation –6.6dB
Recording mute OFF
Positive/negative dual power supplies
Single power supply
Referenced to the DGND pin (Pin 3).
DGND to 0.5V
DGND to 0.5V
2.5V
2.5V
4.0V to V
CC
4.0V to V
CC
4. Low frequency boost (low frequency compensation)
The CXA1597 low frequency boost function can be implemented simply by connecting a capacitor to the
BOOST pins (Pins 6 and 11) as described in Description of Operation. Although the boost is fixed to 6dB, the
time constant which determines the cut-off frequency can be set to any desired value depending on the
capacitance of the external capacitor. The pole (f1) and zero (f2) shown in Fig. 3. Low frequency boost
frequency response can be expressed, with the external capacitor assumed to be CB, as follows:
f
1
= 1
2
= 1
2
π
C
B
(9.53k
)
Based on the above equation, determine the best low frequency response.
However, the resistance which determines the time constant along with the external capacitor is the internal
resistance, so that the cut-off frequency tends to fluctuate depending on the unevenness and temperature
characteristics inherent in the IC. Note that the unevenness and the temperature characteristics of the
internal resistance that determines the low frequency boost frequency response are approximately ±20% and
+2500 ppm/°C, respectively.
When not using low frequency boost, follow the procedure described below.
a) For positive/negative dual power supplies
Connect the BOOST pins (Pins 6 and 11) to GND.
b) For single power supply
Connect a fairly large capacitor (3.3μF or more) to the BOOST pins (Pins 6 and 11) or simply leave the
BOOST pins open. If the BOOST pins are left open, note that the output level increases by 6dB, so the
input reference should be set 6dB down. The CXA1597 is basically designed for positive/negative dual
power supplies and the BOOST pins cannot be easily connected to GND as in the case of
positive/negative dual power supplies.
2
π
C
B
(4.8k
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CXA1598M | Recording Equalizer Amplifier for Stereo Cassette Decks(立體聲盒式錄音機錄音均衡放大器) |
| CXA1598S | Recording Equalizer Amplifier for Stereo Cassette Decks(立體聲盒式錄音機錄音均衡放大器) |
| CXA1598 | Recording Equalizer Amplifier for Stereo Cassette Decks |
| CXA1599Q | 1-Chip Cassette Deck IC(單片盒式錄音機芯片) |
| CXA1635 | STEREO PRE-AMPLIFIER/POWER-AMPLIGIER WITH 3V GOVERNOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CXA1598 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Recording Equalizer Amplifier for Stereo Cassette Decks |
| CXA1598M | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Recording Equalizer Amplifier for Stereo Cassette Decks |
| CXA1598M/S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Recording Equalizer Amplifier for Stereo CassetteDecks |
| CXA1598S | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:Recording Equalizer Amplifier for Stereo Cassette Decks |
| CXA1599Q | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:1-chip Cassette Deck |
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