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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.:

US 9252716 B1

PDFFull Text
Expired
Date of Patent:
Feb. 02, 2016

Filed:

Apr. 10, 2014

High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device

Applicant:

Tdk Corporation, Tokyo, JP;

Inventors:

Sadaharu Yoneda, Tokyo, JP;

Atsushi Ajioka, Tokyo, JP;

Tomohiko Shibuya, Tokyo, JP;

Atsushi Tsumita, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Steven J Mottola

Assistant Examiner:

Hafizur Rahman

Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/08 (2006.01); H03F 3/19 (2006.01); H03F 3/26 (2006.01);
U.S. Cl.
CPC ...
H03F 1/083 (2013.01); H03F 3/19 (2013.01); H03F 3/26 (2013.01); H03F 3/45475 (2013.01); H03F 3/45928 (2013.01); H03F 2200/06 (2013.01); H03F 2200/405 (2013.01); H03F 2200/451 (2013.01); H03F 2200/537 (2013.01);
Abstract

A high-frequency amplifier circuit includes a balanced-unbalanced converter converting a single-ended signal into differential signals. The output of a first amplifier amplifying the single-ended signal is connected to the signal terminal on the unbalanced side of the balanced-unbalanced converter. The input of a second amplifier amplifying one of the differential signals is connected to one signal terminal on the balanced side of the balanced-unbalanced converter. The input of a third amplifier amplifying another of the differential signals is connected to another signal terminal on the balanced side of the balanced-unbalanced converter. An impedance element is inserted between an element on the balanced side of the balanced-unbalanced converter and a ground.

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Yoneda, Sadaharu. (2016). High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device (U.S. Patent No. 9252716). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9252716

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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