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參數(shù)資料
| 型號： | LA4167M |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO30 |
| 封裝： | 0.375 INCH, MFP-30 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 372K |
| 代理商： | LA4167M |
LA4167M
No.4036-13/21
(2) Mike amp, REC amp, and power amp voltage gain distribution during recording
Be aware that during recording, the power amp is not BTL, and there is single operation for only power amp 2.
(3) VOX circuit (VOX equivalent circuit)
VOX on time can be adjusted by varying C8 at pin 6. Increasing the capacitance delays attack time, and reducing
capacitances hastens it (VOX on
= Approx. 40ms when C8 = 4.7μF and C9 = 22μF).
VOX off time can be adjusted by varying C9 at pin 7 (VOX off = Approx. 4s when C8 = 4.7μF and C9 = 22μF).
To continue VOX circuit operation when MIC input is below the specified level, increase the capacitance of the
capacitor between pin 7 and VCC.
To keep the governor circuit on after the VOX circuit is switched off, turn on the switch and ground pin 7 in the
equivalent circuit shown above.
Only a capacitor is mounted between pin 6 and ground. A resistor is not mounted because when the VOX circuit is
turned on, a minute charging current is present at pin 6, and the resistance would bypass this minute current,
causing a delay in operation and, in the worst case, failure of the VOX circuit to operate.
+
R
4.7
μF
6
A resistor must not be installed.
The VOX circuit has a hysteresis width of approximately 6dB. But as shown in the figure above, the VOX circuit is
switched on when the voltage at pin 6 is over approximately 1.3V, and is switched off when voltage is below
approximately 0.7V. The bias to keep the VOX circuit on at this time must be an average or smooth voltage over
approximately 0.75V.
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| LA4168 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Record/Playback System for Microcassette and Compact Cassette Recorders(148.50 k) |
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| LA4175 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:SINGLE-CHIP AF AMPLIFIER |
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