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. 04, 1993
Filed:
Dec. 20, 1991
Duck-young Jung, Namdong-ku, KR;
Seung-yup Koo, Seoul, KR;
Samsung Electronics Co., Ltd., Kyunggi-do, KR;
Abstract
In a noise reduction circuit with a main signal path and an auxiliary signal path having a high-pass filter characteristic, the noise reduction circuit comprises: a voltage-to-current converting circuit having a differential input and output and connecting the auxiliary signal path to the main signal path, PN junction transistors connected to the differential output of the voltage-to-current converting circuit, a paired common-emitter transistor arrangement having one base electrode connected to the PN junction transistors, a capacitance connected to a first differential input of the voltage-to-current converting circuit, a feedback resistor connecting a collector of a first common-emitter transistor pair of the paired common-emitter transistor arrangement to the first differential input of the voltage-to-current converting circuit, a voltage buffer having the collector of the first common-emitter transistor pair of the paired common-emitter transistor arrangement and a voltage dividing resistance connected to a first differential input terminal, and an operational circuit for summing the auxiliary signal and main signal outputs. Accordingly, the circuit can minimize the layout area of an integrated circuit.