Patent Number: 7,821,324

Title: Reference current generating circuit using on-chip constant resistor

Abstract: Provided is a reference current generating circuit capable of maintaining a constant output level regardless of a temperature variation by the use of a reference resistor having a constant resistance regardless of the temperature variation. The reference current generating circuit includes a reference voltage circuit supplying a reference voltage having a constant level regardless of a temperature variation, and a reference resistor circuit comprising a resistor having a positive temperature coefficient and a resistor having a negative temperature coefficient that are connected in series, the reference resistor circuit having a constant total resistance regardless of the temperature variation. Herein, a reference current having a constant level regardless of the temperature variation is generated by the reference voltage and the resistance of the reference resistor circuit.

Inventors: Han; Dong Ok (Gyunggi-do, KR)

Assignee: Samsung Electro-Mechanics, Co., Ltd

International Classification: G05F 1/10 (20060101)

Expiration Date: 2018-10-26 0:00:00