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參數資料
| 型號： | U4055B |
| 英文描述： | Low-Voltage Electronic Speech Circuit with Dialer Interface |
| 中文描述： | 低壓電路的電子語音撥號接口 |
| 文件頁數： | 2/10頁 |
| 文件大小： | 150K |
| 代理商： | U4055B |
U4055B/U4055B1
TELEFUNKEN Semiconductors
Rev. A1, 06-May-96
Preliminary Information
2 (10)
Pin Description
Pin
1, 2
Symbol
H
1
and H
2
The push-pull complementary
outputs of the receive amplifier.
Dynamic transducers with a
minimum impedance of 100
can be directly driven by these
outputs.
GND
Ground.
ST
The output of the sidetone
cancellation signal, which
requires a balanced impedance
of 8–10 times the subscribers
line impedance to be connected
to Pin 13.
CK2
Input to the line output driver
amplifier. Transmit a.g.c. applied
to this stage.
CK1
The transmit pre-amp output
respective of the DTMF output
which is normally capacitively
coupled to Pin 5.
MIC 1,
MIC 2
microphone amplifier with high
common mode rejection ratio.
DTMF IN The DTMF input has an internal
resistor connected to ground. It
provides the load resistor for the
emitter of a CMOS DTMF
generator. This input is only
active when MUTE (Pin 10) is
pulled high or MUTE is pulled
low.
MUTE or
MUTE
at least at 1.5 V (MUTE) or at
less than 0.5 V (MUTE) to mute
the MIC Amp. and Audio Amp.
and enable DTMF IN.
Function
3
4
5
6
7, 8
Inputs of symmetrical
9
10
The MUTE input must be pulled
Pin
11
Symbol
V+
Function
Regulated output voltage of
2.7 V for biasing a DTMF
generator activated by MUTE.
The receive amplifier input. The
receiving amplification is
regulated of an a.g.c.
Positive supply voltage input to
the device. This input should be
connected to the positive output
of the polarity guard. The current
through this pin is modulated by
the transmit signal.
An external resistor (2 W) is
required from this pin to GND to
control the dc input impedance
of the circuit. It has a nominal
value of 56 for low voltage
operation. Values up to 100
may be used to increase the
available transmit output voltage
swing at the expense of low-
voltage operation.
This internal voltage bias line
must be connected to V
L
via an
external resistor, R
B
, which
dominates the ac input imped-
ance of the circuit and should be
620
for an 600 input
impedance or 910
for a 900
input impedance.
The range of transmit and
receive gain variations between
short and long loops may be
adjusted by connecting a resistor
R
EX1
from this pin to Pin 3
(GND). This pin can be left open
to set a.g.c. out of action.
12
REC IN
13
V
L
14
R
DC
15
V
I
16
R
AGC
相關PDF資料 |
PDF描述 |
|---|---|
| U4055B1 | Low-Voltage Electronic Speech Circuit with Dialer Interface |
| U4070B-FP | Tone Ringer Interface |
| U4074B | Tone Ringer Interface |
| U4076B | Three-Tone Ringer for Telephone Sets |
| U4076B-FL | Three-Tone Ringer for Telephone Sets |
相關代理商/技術參數 |
參數描述 |
|---|---|
| U4055B1 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Low-Voltage Electronic Speech Circuit with Dialer Interface |
| U4056B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TELEFUNK ELECTRONIC CREATIVE TECHNOLOGIEN U2200B-FP |
| U4058B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TELEFUNK ELECTRONIC CREATIVE TECHNOLOGIEN U2200B-FP |
| U406 | 功能描述:JFET Dual Matched RoHS:否 制造商:ON Semiconductor 晶體管極性:N-Channel 漏極電流（Vgs=0 時的 Idss）:50 mA 漏源電壓 VDS:15 V 閘/源擊穿電壓: 漏極連續電流:50 mA 配置: 安裝風格: 封裝 / 箱體:SC-59 封裝:Reel |
| U406_TO-71 | 制造商:MICROSS 制造商全稱:MICROSS 功能描述:Low Noise, Low Drift, Monolithic Dual N-Channel JFET |
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