SL1062A
Voltage gain is defined as GV = 20 log
VO
VI
For measuring gain from MIC+ and MIC- the MUTE input should be HIGH.
For measuring the DTMF input, the MUTE input should be LOW or open-circuit.
Inputs not being tested should be open-circuit.
Figure 3. Test circuit for defining SL1062A voltage gain of MIC+, MIC- and DTMF inputs.
Figure 4. Equivalent circuit of SL1062A anti-sidetone bridge
SLS
System Logic
Semiconductor