Switches when turn ON

Voltage level

S1, S4, S5,S8, S9, S12

V1 + V2 + V3

S1,S4, S5, S8, S9, S10

V1 + V2

S2,S4, S5, S8, S9, S10

V2

S1, S4, S7, S8, S9, S10

V1

No switches are ON

0

S2, S3, S7, S8, S9, S10

−V1

S2, S4, S7, S6, S9, S10

−V2

S2, S3, S7, S6, S9, S10

V1 + V2

S2, S3, S7, S6, S11, S10

V1 + V2 + V3