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參數(shù)資料
| 型號(hào)： | KA8601C |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | SPEAKER PHONE WITH SPEECH NETWORK |
| 中文描述： | 免提電話與語(yǔ)音網(wǎng)絡(luò) |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大小： | 280K |
| 代理商： | KA8601C |
KA8601C SPEAKER PHONE WITH SPEECH NETWORK
2. VOLUME CONTROL
The volume control can only be applied in the receive mode. If the voltage of the V
C
mode is the same as the V
B
, the
receive attenuator gain is maximized and the transmit gain is minimized. At the same time, if the V
C
mode voltage is
less than the V
B
, the receive attenuator gain is reduced.
Fig. 5
3. VOICE DETECTION FUNCTION
The voice detection function compares the microphone amplifier output level with the outside audio amplifier level
and the transmit attenuator output level with the receive attenuator input level, after which they are inputted into the
control box. The block diagram of the voice detection function is as follows:
Fig. 6
It is useful to use a background noise monitor when high background noise occurs. When the input signals to the
background noise monitor are increased, voltage for the PD
RX
(PD
TX
) mode is stably increased. The increase time
is determined by 100K
and 47
μ
F.
4. ATTENUATOR CONTROL BOX
In figure 6, each signal coming into the log amplifier is amplified and then inputted into the comparator (C1, C2). The
comparator compares the amplified signal levels, after which they are inputted into the attenuator control box. The
attenuator control box processes these signals (CO1, CO2, CO3, CO4) as logic signals, and which are put into one
of the following modes:
KA8601C
V
B
V
C
VOLUME
DETI
RX
1
DETI
TX
1
Log Amp
Log Amp
DETO
RX
1
DETO
TX
1
Comparator
PD
RX
Background
Noise Monitor
CO1
CO2
Attenuator Control Box
DETI
TX
1
DETI
RX
1
Log Amp
Log Amp
DETO
TX
1
DETO
TX
1
Comparator
PD
TX
CO4
CO3
A1
A2
C1
C2
A4
A3
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| KA8602 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LOW VOLTAGE AUDIO POWER AMPLIFIER |
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| KA8602BD | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:LOW VOLTAGE AUDIO AMPLIFIER |
| KA8602D | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:LOW VOLTAGE AUDIO AMPLIFIER |
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