Abstract: A semiconductor integrated circuit device may include a pad, a first voltage protection circuit and a second voltage protection circuit. The first voltage protection circuit may be connected with the pad. The second voltage protecting circuit may be connected between the first voltage protection circuit and a ground terminal. The first voltage protection circuit may include a gate positive p-channel metal oxide semiconductor (GPPMOS) transistor. The second voltage protection circuit may include serially connected GPPMOS transistors.

Abstract: A semiconductor integrated circuit device may include a pad, a first voltage protection circuit and a second voltage protection circuit. The first voltage protection circuit may be connected with the pad. The second voltage protecting circuit may be connected between the first voltage protection circuit and a ground terminal. The first voltage protection circuit may include a gate positive p-channel metal oxide semiconductor (GPPMOS) transistor. The second voltage protection circuit may include serially connected GPPMOS transistors.

Abstract: An electro-static discharge (ESD) protection device includes a first PN diode, a second PN diode and a silicon controlled rectifier (SCR). The first PN diode and the second PN diode are coupled in series between a pad and a ground voltage to provide a first discharge current path. The SCR is coupled between the pad and the ground voltage to provide a second discharge current path. The SCR has a PNPN structure.

Abstract: An electro-static discharge (ESD) protection device includes a first PN diode, a second PN diode and a silicon controlled rectifier (SCR). The first PN diode and the second PN diode are coupled in series between a pad and a ground voltage to provide a first discharge current path. The SCR is coupled between the pad and the ground voltage to provide a second discharge current path. The SCR has a PNPN structure.

Abstract: An electro-static discharge (ESD) protection device includes a first PN diode, a second PN diode and a silicon controlled rectifier (SCR). The first PN diode and the second PN diode are coupled in series between a pad and a ground voltage to provide a first discharge current path. The SCR is coupled between the pad and the ground voltage to provide a second discharge current path. The SCR has a PNPN structure.

Abstract: An electro-static discharge (ESD) protection device includes a first PN diode, a second PN diode and a silicon controlled rectifier (SCR). The first PN diode and the second PN diode are coupled in series between a pad and a ground voltage to provide a first discharge current path. The SCR is coupled between the pad and the ground voltage to provide a second discharge current path. The SCR has a PNPN structure.

Abstract: Disclosed is a musical accessory, equipped with a tuner for stringed instruments and/or a metronome, capable of generating power by itself, which is convenient to use. In an aspect, the musical accessory comprises a casing housing a sensor, an amplifier, an A/D converter, an indication unit, a microprocessor, and a power supply unit, wherein the power supply unit includes a driver pivotably installed on one side of the casing, a power generation module for generating electromotive force by receiving rotary power from the driver, and a charger connected to the power generation module and storing some amount of the electromotive force, wherein the musical accessory is operated by receiving power from the charger.

Abstract: Disclosed is a musical accessory, equipped with a tuner for stringed instruments and/or a metronome, capable of generating power by itself, which is convenient to use. In an aspect, the musical accessory comprises a casing housing a sensor, an amplifier, an A/D converter, an indication unit, a microprocessor, and a power supply unit, wherein the power supply unit includes a driver pivotably installed on one side of the casing, a power generation module for generating electromotive force by receiving rotary power from the driver, and a charger connected to the power generation module and storing some amount of the electromotive force, wherein the musical accessory is operated by receiving power from the charger.