TEA1118 Philips Semiconductors, TEA1118 Datasheet - Page 8

• Manufacturer Part Number: TEA1118
• Description: Versatile cordless transmisssion circuit
• Manufacturer: Philips Semiconductors

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Philips Semiconductors
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
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
adjustment range is 12 dB. Two external capacitors C
(connected between GAR and QR) and C
between GAR and V
1997 Jul 14
Versatile cordless transmisssion circuit
GAR
R exch
EE
R line
V exch
I line
between pins GAR and QR; the
) ensure stability.
TEA1118A
TEA1118
I SLPE
I sh
GARS
SLPE
LN
R SLPE
20
Fig.7 Supply configuration.
(connected
EE
GAR
is
8
The cut-off frequency corresponds to the time constant
C
which sets the gain with a typical value of 100 k . The
condition C
stability.
Automatic gain control is provided on this amplifier for line
loss compensation.
The C
GAR
from preamp
619
R CC
4.7 F
GAR
REG
C REG
(R
I
GARint
*
capacitor provides a first-order low-pass filter.
GARS
I CC
// R
= 10
V CC
V EE
GAR
). R
TEA1118; TEA1118A
C
GAR
GARint
must be fulfilled to ensure
C VCC
100 F
is the internal resistor
MBH274
peripheral
Product specification
circuits
I p