Patent ID: 6970487
Filing Date: 2005-11-29
Classification: G11B,H01S

Abstract:
1. A semiconductor laser driving circuit comprising: an integrated circuit for driving a semiconductor laser that emits light used for optical recording; and a substrate on which the integrated circuit is mounted, wherein: the integrated circuit incorporates: a switching element generating a driving signal for driving the semiconductor laser; a high-potential power terminal and a low-potential power terminal for feeding supply voltage to the switching element; and a driving signal output terminal for outputting the driving signal generated at the switching element to an external device; the high-potential power terminal, the low-potential power terminal and the driving signal output terminal are disposed side by side at one of sides of the integrated circuit; the substrate incorporates: a high-potential conductor that is connected to the high-potential power terminal and applies a high potential to the high-potential power terminal; a low-potential conductor that is connected to the low-potential power terminal and applies a low potential to the low-potential power terminal; and a driving signal transmitting conductor that connects the driving signal output terminal to the semiconductor laser and transmits the driving signal to the semiconductor laser; and the semiconductor laser driving circuit further comprises a capacitor that is disposed beside the one of the sides of the integrated circuit, one of ends of the capacitor being connected to the high-potential power terminal and the other end being connected to the low-potential power terminal.