Invention Grant
- Patent Title: High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device
- Patent Title (中): 高频放大器电路，半导体器件和磁记录再生装置
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Application No.: US14250118Application Date: 2014-04-10
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Publication No.: US09252716B2Publication Date: 2016-02-02
- Inventor: Sadaharu Yoneda , Atsushi Ajioka , Tomohiko Shibuya , Atsushi Tsumita
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2013-087510 20130418; JP2014-042385 20140305
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03F1/08 ; H03F3/19 ; H03F3/26
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.
Public/Granted literature
- US20140312972A1 HIGH-FREQUENCY AMPLIFIER CIRCUIT, SEMICONDUCTOR DEVICE, AND MAGNETIC RECORDING AND REPRODUCING DEVICE Public/Granted day:2014-10-23
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