l6726-s18-t Unisonic Technologies, l6726-s18-t Datasheet - Page 11

• Manufacturer Part Number: l6726-s18-t
• Description: Universal Speech Circuit
• Manufacturer: Unisonic Technologies

L6726
DESIGN PROCEDURE:
Others:
Cut off the transmitter can be done at F1 without interference of other functions of the circuit.
When using the extended low current and low voltage range (5mA, 2V), two resistors have to be connected from the
microphone inputs to ground as shown in figure 13.
1. Circuit impedance to the line.
2. DC-characteristic
5. Receiver gain and frequency response.
7. Components to suppress radio interference, specially the wires up to the handset.
3. Gain regulation.
4. Transmitter gain and frequency response.
6. Side-tone.
The circuit can be placed either in the telephone or in the handset.
APPLICATION INFORMATION(Cont.)
R
R
R
R
R
R
Figure 7. Examples of network "2"
A
A
A
B
A
B
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11
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UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
C
C
C
A
A
A
3
3
3
3
C
C
C
B
A
B
C
C
R
R
R
R
R
R
R
R
B
A
A
A
B
A
B
A
B
B
11
11
11
11
C
C
C
A
A
A
3
3
3
3
R
C
C
C
B
B
A
B
Figure 8. Examples of network "4"
LINEAR INTEGRATED CIRCUIT
R
R
R
6
6
6
2
2
2
R
R
R
R
R
R
R
A
A
A
C
B
C
B
R
C
R11
R
B
R
B
11
11
15
15
15
C
C
R10
R10
R10 +Line
A
A
+Line
+Line
QW-R108-015,B
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