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參數(shù)資料
| 型號： | TEA1118T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Versatile cordless transmisssion circuit |
| 中文描述： | TELECOM, CORDLESS, BASEBAND CIRCUIT, PDSO14 |
| 封裝： | SO-14 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大小： | 188K |
| 代理商： | TEA1118T |
1997 Jul 14
8
Philips Semiconductors
Product specification
Versatile cordless transmisssion circuit
TEA1118; TEA1118A
Receive amplifier (pins IR, GAR and QR)
The receive amplifier has one input (IR) and one output
(QR). The input impedance between pins IR and V
EE
is
20 k
. The voltage gain from pin IR to pin QR is set at
31 dB. The gain can be decreased by connecting an
external resistor R
GAR
between pins GAR and QR; the
adjustment range is 12 dB. Two external capacitors C
GAR
(connected between GAR and QR) and C
GARS
(connected
between GAR and V
EE
) ensure stability.
The C
GAR
capacitor provides a first-order low-pass filter.
The cut-off frequency corresponds to the time constant
C
GAR
×
(R
GARint
// R
GAR
). R
GARint
is the internal resistor
which sets the gain with a typical value of 100 k
. The
condition C
GARS
= 10
×
C
GAR
must be fulfilled to ensure
stability.
Automatic gain control is provided on this amplifier for line
loss compensation.
Fig.7 Supply configuration.
handbook, full pagewidth
Ish
ISLPE
REG
LN
SLPE
VEE
VCC
RCC
CVCC
100
μ
F
ICC
CREG
4.7
μ
F
RSLPE
20
Vexch
Rexch
Iline
Rline
TEA1118
TEA1118A
I
*
Ip
peripheral
circuits
619
MBH274
from preamp
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