| 摘要 |
A semiconductor laser driving circuit comprises a driving IC (4) and a substrate on which the IC (4) is mounted. The IC (4) incorporates: a switching element for generating a driving signal; a high-potential power terminal (42) and a low-potential power terminal (43) for feeding supply voltage to the switching element; and a driving signal output terminal (44) for outputting the driving signal generated at the switching element to an external device. The terminals (42 - 44) are disposed side by side at one of sides of a main body (4a) of the IC 4. The substrate incorporates conductors (45 - 47) to be connected to the terminals (42 - 44). Chip capacitors (51, 52) are disposed beside the one of the sides of the IC (4) at which the terminals (42 - 44) are disposed. An end of each of the capacitors (51, 52) is connected to the high-potential power terminal (42) while the other end is connected to the low-potential power terminal (43). <IMAGE> |
