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:
Oct. 03, 2000
Filed:
Sep. 10, 1998
Dong-Young Chang, Seoul, KR;
Jae-Yup Lee, Seoul, KR;
Seung-Hoon Lee, Seoul, KR;
Yong-In Park, Seoul, KR;
Seung Woo Park, Cheongju, KR;
Hyundai Electronics Industries Co., Ltd., Ichon, KR;
Abstract
An analog/digital (A/D) converting circuit is provided that stabilizes system operation, reduces power consumption in an analog circuit region and uses a selected metal-to-metal capacitor, which has a small parasitic capacitance value. The A/D converting circuit includes a first sample/hold amplifier for sampling/holding an analog input signal, a switch for selecting one of a signal outputted from the first sample/hold amplifier and a feedback signal and an A/D sub-converter for converting an analog signal outputted from the switch to a digital signal. A multiplying D/A converting block converts an output signal from the A/D sub-converter to an analog signal and amplifies a difference value obtained between the analog signal and the analog signal outputted from the switch. A second sample/hold amplifier samples/holds a signal outputted from the multiplying D/A converting block and outputs the feedback signal to the switch. A digital correcting unit outputs an N bit digital signal by superimposing output signals from the A/D sub-converter by 1 bit and a timing controller generates a control signal and a timing clock signal for the operation of each unit.