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:
Jan. 05, 2010
Filed:
Feb. 22, 2008
Suguru Tachibana, Kawasaki, JP;
Ikuo Hiraishi, Kawasaki, JP;
Azusa Saito, Kawasaki, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
A successive approximation type AD converter circuit for comparing an analog input signal with an output analog signal of a DA converter with a comparator to input a digital signal output in accordance with a comparison result to the DA converter to determine a digital signal obtained if the output analog signal of the DA converter is equal to the analog input signal, as an AD-converted output signal, includes: an AD converter for AD-converting the analog input circuit in accordance with a sampling period for sampling the analog input signal and a comparison period for comparing the sampled analog input signal with the output analog signal of the DA converter with the comparator; and setting means for independently setting a cycle time of a first clock signal for determining the sampling period and a cycle time of a second clock signal for determining the comparison period.