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:
May. 19, 2009
Filed:
Oct. 16, 2007
Seung-hyun Lim, Jeonju-si, KR;
Jeong-hwan Lee, Dobong-gu, KR;
Gun-hee Han, Goyang-si, KR;
Seog-hoon Ham, Suwon-si, KR;
Seung-Hyun Lim, Jeonju-si, KR;
Jeong-Hwan Lee, Dobong-gu, KR;
Gun-Hee Han, Goyang-si, KR;
Seog-Hoon Ham, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
An analog-to-digital converter (ADC) includes first and second circuits, a differential amplifier, a comparator and a digital-to-analog converter (DAC). The first circuit samples a reset voltage, amplifies the sampled reset voltage, and subtracts a first reference voltage from the amplified reset voltage to produce a first difference. The second circuit samples a signal voltage, amplifies the sampled signal voltage, and subtracts a second reference voltage from the amplified signal voltage to produce a second difference. The differential amplifier produces a third difference based a comparison of the first and second differences from the first and second circuits. The comparator compares an output of the differential amplifier with at least one predetermined comparison voltage and outputs a comparison result as a digital value. The DAC is connected to the first and second circuits and the comparator, and controls the first and second reference voltages in response to the digital value.