METHOD FOR SORTING OUT OF POTENTIALLY UNRELIABLE TRANSISTORS Russian patent published in 2013 - IPC G01R31/26 

FIELD: electricity.

SUBSTANCE: coefficient of resistors amplification is measured in a common-emitter circuit at normal and high temperature. Absolute difference value Δ=h_21e100°C-h_21e20°C and values of relative change in amplification coefficient K= h_21e100°C/h_21e20°C are calculated for each transistor; h_21e100°C, h_21e20°C are values of amplification coefficient at high and normal temperature respectively. Transistors are sorted out when they meat two criteria simultaneously: Δ≥Δ_av; K≥K_av, where Δ_av and K_av are average values of absolute difference and relative change in retrieval for this type of transistors.

EFFECT: simplifying and enlarging functional capabilities.

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