SEMICONDUCTOR INTEGRATED CIRCUIT AND CONSTANT CURRENT DRIVING SYSTEM

SEMICONDUCTOR INTEGRATED CIRCUIT AND CONSTANT CURRENT DRIVING SYSTEM

A semiconductor integrated circuit (16) includes a constant-voltage circuit (30) that outputs a constant voltage and a constant-current circuit (32). The constant-current circuit (32) includes a first transistor (36). A voltage input as an input voltage to a first gate electrode of the first transis...

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Hauptverfasser: URUNO, Satoki, AOKI, Daisuke, MATSUBARA, Junichi, SHIMA, Kengo
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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creator URUNO, Satoki
AOKI, Daisuke
MATSUBARA, Junichi
SHIMA, Kengo
description A semiconductor integrated circuit (16) includes a constant-voltage circuit (30) that outputs a constant voltage and a constant-current circuit (32). The constant-current circuit (32) includes a first transistor (36). A voltage input as an input voltage to a first gate electrode of the first transistor (36) is equal to the node voltage at an intermediate node (38) in a connection path between the output of the constant-voltage circuit (30) and an external resistor (18). A source region of the first transistor (36) is connected to a fixed power supply (22), and a drain region of the first transistor (36) is connected to the external power supply (12) via a load (14). In the first transistor (36), a constant current can be made to flow between the source region and the drain region based on the input voltage. A constant-current drive system (10) in which the semiconductor integrated circuit (16) and the external resistor (18) have been mounted on a circuit board (20) is also constructed.
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subjects CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
title SEMICONDUCTOR INTEGRATED CIRCUIT AND CONSTANT CURRENT DRIVING SYSTEM
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