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:
Dec. 22, 2009
Filed:
Jan. 14, 2008
Byeong Hak JO, Gyunggi-do, KR;
Yoo Sam NA, Seoul, KR;
Kyoung Seok Park, Gyunggi-do, KR;
Hyeon Seok Hwang, Seoul, KR;
Seung Min OH, Gyunggi-do, KR;
Byeong Hak Jo, Gyunggi-do, KR;
Yoo Sam Na, Seoul, KR;
Kyoung Seok Park, Gyunggi-do, KR;
Hyeon Seok Hwang, Seoul, KR;
Seung Min Oh, Gyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Gyunggi-Do, KR;
Abstract
There is provided a bias current generating apparatus capable of providing a bias current where a characteristic change is compensated, to one of an analog circuit and RF circuit where various characteristic changes occur according to a temperature, by generating bias currents having a plurality of temperature coefficients. The apparatus includes: a positive temperature coefficient current generator generating a positive temperature coefficient current in direct proportion to an absolute temperature; a zero temperature coefficient current generator generating a zero temperature coefficient current constant regardless of the absolute temperature; and an adjustable temperature coefficient current generator generating and outputting an adjustable temperature coefficient current by amplifying the positive temperature coefficient current by A times, amplifying the zero temperature coefficient current by B times, adding the two amplified temperature coefficient currents, wherein a temperature coefficient of the adjustable temperature coefficient current is varied by adjusting sizes of the A and B.