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UA8229-J15-A-T датащи(PDF) 7 Page - Unisonic Technologies

номер детали UA8229-J15-A-T
подробное описание детали  LOW FREQUENCY POWER AMPLIFIER
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производитель  UTC [Unisonic Technologies]
домашняя страница  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UA8229-J15-A-T датащи(HTML) 7 Page - Unisonic Technologies

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UA8229
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
7 of 9
www.unisonic.com.tw
QW-R107-033.C
APPLICATION INFORMATION
1. Adjustment of voltage gain
The voltage gain GV is obtained by R1, R2 and RF as below. By increasing RF, reduction of GV is possible. 40dB or
over in use is recommended.
RF + R1 + R2
GV = 20 log
RF+ R1
Sine oscillation is probable as a result of feedback in crease.
2. Input stage
The input circuit of this IC is as shown as below.
PNP TR: TR1 is provided in the input circuit so as to make its usage possible without the input coupling capacitor.
However, at Pin 10 and Pin 11 max 60 mV offset voltage is produced.
Fig.2 illustrate the input circuit of UTC UA8229. A offset voltage of 60mV max is possible. TR1 is featured to eliminate
the usage of coupling capacitor.
2/4
INPUT
30kΩ
30kΩ
OUTPUT
To DRIVER
45Ω
To BIAS
NF
Rf
+
47μF
TR3
TR2
TR1
GND
CIN
10/11
13/14
9/12
2/4
INPUT
30kΩ
30kΩ
OUTPUT
To DRIVER
45Ω
To BIAS
NF
Rf
Fig. 2
+
47μF
TR3
TR2
TR1
GND
CIN
10/11
13/14
9/12
FOR HSIP-14B PACKAGE
FOR HSIP-15A PACKAGE


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