+2.70 V+2.70 \mathrm{~V}+2.70 V
−2.70 V-2.70 \mathrm{~V}−2.70 V
+2.02 V+2.02 \mathrm{~V}+2.02 V
−2.02 V-2.02 \mathrm{~V}−2.02 V