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. 29, 2002
Filed:
Apr. 09, 2001
Applicant:
Inventors:
Hiroya Ueno, Osaka, JP;
Junji Nakatsuka, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 3/00 ;
U.S. Cl.
CPC ...
H03M 3/00 ;
Abstract
For the realization of a unipolar analog input range, in addition to the provision of an analog input sampling circuit having an input capacitor, a charge transfer circuit, an integrator having an integrating capacitor, a comparator, and a D-type flip-flop, there is further provided a reference voltage sampling circuit for selectively adding either of a subtraction and addition voltages which are different from each other to a sampled analog input voltage in response to a delayed comparator output. The reference voltage sampling circuit has a subtraction and addition capacitors differing in capacitance value from each other.