The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2007
Filed:
May. 06, 2005
Hack-soo OH, Chungcheongbuk-do, KR;
Hack-Soo Oh, Chungcheongbuk-do, KR;
Abstract
A reference voltage and reference current generator supplies a reference voltage and a reference current, both having stable levels regardless of temperature variation. The reference voltage and reference current generator includes a reference voltage generating unit, a first current mirror, a temperature compensation MOS transistor and a second current mirror. The reference voltage generating unit outputs a reference voltage having a stable level regardless of temperature variation and process variation by using junction voltage characteristic and thermal voltage characteristic of a bipolar transistor, and supplies an inner current corresponding to the thermal voltage characteristic. The first current mirror supplies a first current by mirroring the inner current. The temperature compensation MOS transistor supplies a second current corresponding to the reference voltage through the source-drain stage. The second current mirror supplies a reference current corresponding to the sum of the first current and the second current.