Fig. 5. Three types of the heater module. (A) Composition of module 1. Q1 : Heater, F2 : 0Ω, R8 : 0Ω. (B) Composition of module 2. Q1 : Heater, F2 : 40 mA PPTC, R8 : 0Ω. (C) Composition of module 3. Q1 : Heater, F2 : 40 mA PPTC, R8 : 10Ω. PPTC : Polymeric Positive Temperature Coefficient.

Korean J Acupunct 2021;38:282-9 https://doi.org/10.14406/acu.2021.029

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