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. 11, 1993
Filed:
Apr. 28, 1992
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An offset reducer includes an adder for adding an input signal and an offset cancel signal to reduce an offset component of the input signal. A converter serves to measure a difference between a sum of past periods during which an output signal of the adder was positive and a sum of past periods during which the output signal of the adder was negative. The converter outputs an offset detection signal of a given value which depends on a sign of the measured difference when an absolute value of the measured difference exceeds a given difference. The converter initializes the measured difference to a given initial difference when the offset detection signal is outputted. An integrator serves to accumulate the offset detection signal outputted from the converter. The integrator generates the offset cancel signal in accordance with a result of the accumulating the offset detection signal. The output signal of the adder constitutes an offset-free signal corresponding to the input signal.