Basic exercise of Electronic Technology (2.9) Analysis

As shown in the circuit, diodes D1 and D2 are ideal components of the same model. The resistance R is 4 kb, the point UA is 1 V, and the point UB is 3 V. Then the point uo is equal?

Analysis, because the two diodes are ideal components, so the internal resistance is 0, so the conduction pressure drop is 0, assuming UB conduction, The uo potential is 3 V, then UA is also turned on. At this time, the potential of UO will be clamped at 1 V, so that because the potential of UB is 3 V, D2 will be in the reverse cutoff state. Therefore, the UA may only be turned on in this circuit. The uo potential is 1 v.