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參數(shù)資料
| 型號(hào)： | LA7289 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | VCR Audio Signal Record and Playback Processor |
| 中文描述： | 錄像機(jī)音頻信號(hào)處理器記錄和回放 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大?。?/td> | 210K |
| 代理商： | LA7289 |
Pin No.
5
Function
Function description
Negative feedback for the EQ amplifier.
Internal circuit
EQ AMP NFB
6
EQ switch 1
Switches the playback EQ amplifier
high-frequency voltage gain.
LP, SP
→
On
EP
→
Off
On resistance
→
20
(typical)
7
EQ amplifier output
Output impedance
→
50
(typical)
8
Line amplifier playback input
Inputs the playback signal from
the EP amplifier. Since pin 8 has
the high input impedance of 120 k
,
a 0.1 μF ceramic capacitor can be used
as the coupling capacitor.
9
ALC FILTER
Detection is performed using the
capacitor connected between this pin
and ground. The attack and recovery times
are determined by the time constant of
the RC circuit connected to this pin.
10
Line amplifier tuner input
Inputs the EE and record signal.
The reference input is set by the resistors
R1 and R2. The amplifier gain is fixed
at 21.0 dB. Since pin 10 has the high input
impedance of 120 k
, a 0.1 μF ceramic
capacitor can be used as the coupling
capacitor.
11
GND
Ground for all the circuit blocks except
the pin 2 head switching circuit and the
EQ amplifier.
No. 5642-8/11
LA7289
Continued from the preceding page.
Continued on the next page.
A06820
A06821
A06822
A06823
A06824
A06825
A06826
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