4.000V 7999 999∨ R1 R2 2k 3k G1 R3 4V 100000k G 0 0.0UAR1 800.0 R2 0.0 2k G1 R3 0.00000001 800.0uA G 0R 2 3k 800.0uA + - G1 G R 3 0.00000001 800.0uA 4V 800.0uA 0 R 1 2k 800.0uA 7.999V 7.999V 0 R 1 2k 4V R 2 3k + - G1 G 0V R 3 100000k 4.000V