SIGNAL TRANSMISSION CIRCUIT DEVICE, SEMICONDUCTOR DEVICE AND INSPECTION METHOD AND DEVICE FOR THE SEMICONDUCTOR DEVICE, SIGNAL TRANSMISSION DEVICE, AND MOTOR DRIVING DEVICE INCLUDING THE SIGNAL TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a signal transmission device which is less influenced by noise.SOLUTION: A signal transmission device includes: a transformer driving signal generator 15 that generates (N+a) pulses (N≥2, a≥0) in transformer driving signals S1a and S2a in accordance with the pulse edge of an input signal IN; transformers 31 and 32 that generate induction signals S1b and S2b in a secondary-side coil in accordance with the transformer driving signals S1a and S2a input to a primary side coil; comparators 21-1 and 22-1 that generate comparison signals S1c and S2c by comparing the induction signals S1b and S2b with predetermined threshold voltage; and pulse detectors 21-2 and 22-2 that generate the pulses in detection signals S1d and S2d by detecting the N pulses in the comparison signals S1c and S2c.SELECTED DRAWING: Figure 35