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VT3 R10 R11 4 ­ VT4 , ­ VT3. , VT3 , VT4 VT5, 5 R15. ­, VT6,

U6 = Un-UC6, (11)

U5 5; Ua ­ .

, 6 ­ VT9 VT7,

U6 = U6 + U6

+ U8 + UVD2 U9, (12)

U6, U8 U9

VT6, VT8, VT9; UVD2 VD2.

, U. (12) (11)

U = U-U5

+ 2U. (13)

U = U6-U10-U11, (14)

U10

U11 - VT10 VT11.

, , U = U =(, ­ (14)

U = V-Vc5. (15)

6 ­ VT3, , 2 VT2, ­ 6 ­ . . 22 , ­ VT3, . . I =IC3. 6 R19, . , U U5+2U, (. 22), ­ ( VT3), . , ­ .