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:
Mar. 25, 1986
Filed:
Feb. 08, 1984
Kenji Maio, Tokyo, JP;
Atsushi Moritani, Kokubunji, JP;
Hitachi, Ltd, Tokyo, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
An integral-type small signal input circuit having a Miller integrator is adapted to perform cyclically an integrating operation, a resetting operation and an input offset current compensating operation. An input offset current compensation circuit which forms a feedback circuit of the amplifier in the Miller integrator is arranged to supply a compensation current to the amplifier for canceling the input offset current during the compensating operation and to supply the held compensation current to the amplifier during the integrating operation. During the compensation period, a low-pass filter which blocks sinusoidal noise components in the input signal is connected to the input of the integrator so that the held compensation current is not affected by the noise components.