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參數(shù)資料
| 型號(hào)： | KA22296 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Playback / Record PRE AMP FOR DOUBLE DECK(重放/錄音前置放大器) |
| 中文描述： | 播放/錄音前級(jí)的雙層（重放/錄音前置放大器） |
| 文件頁(yè)數(shù)： | 10/17頁(yè) |
| 文件大?。?/td> | 157K |
| 代理商： | KA22296 |
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KA22296 DOUBLE DECK SYSTEM FOR RADIO CASSETTE
2-2 Pin 16 A/B deck selecting switch control
Pin 16 is not set up interiorily through logic, but depending on the outside voltage input the
changing procedure of voltage range exists as deck A or B. In order to delete the pop - noise
which occurs at the time of A/B changing state, this transmission range is selected under the
consideration of its design.
Even by delaying and reducing or creasing the pin 16
’
s input voltage, the pop noise changes in
sound can not be heard through our naked eye.
Note
2 : double input switch ( Pin16 ) control voltage
The two step switch is Pin 16 which selects the A/B deck.
This control voltage is as Fig 2.6.
1. High mode's voltage is more
than 2V which is more than sufficient. It is nice to have the low mode
in 0.3 voltage or just open it as it is. When it isopened, Pin's voltage
is almost zero and in turn results in low voltage.
2. As seen in the Fig 2.6 graph, if 0 volts is inputted into DC direction
under low condition, special blazing fire could result so it is wise to
switch to low when using at open state or at pull down resistance
state.
Note 3
: Double input switch ( Pin 18, Pin 19 ) controlled voltage
It is constructed into logic formation as different from A/B switch, and
the input condition which applies to binary switch formation seem
rather difficult. About the Low = 0.6 to 0.8 V should be inserted.
This under Pin 6 connects to Pin 18, Pin 19 with resisting value of
15
§ú
. At open state, it becomes 0.7 Volt. High is more than 2 Volt.
Fig 2 - 4
VCC
10K
100uA
16
C1 : 22 ~ 47uF
10§ú
Bias
A - on
B - on
B - off
A - off
Control Voltage
0.9V
1.2V
1.6V
80 mSec
at C1:22uF
Fig 2 - 5
Fig 2 - 6
Bias
Control Voltage
ON
OFF
0.9V
1.6V
About 10mV at floating
* 2
Open
State
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