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:
Feb. 26, 2013
Filed:
Mar. 22, 2011
Takayuki Teraguchi, Kanagawa-ken, JP;
Masahiro Hasegawa, Kanagawa-ken, JP;
Noriyoshi Odaki, Kanagawa-ken, JP;
Shigehiro Hosoi, Hyogo-ken, JP;
Takahiro Nakagawa, Kanagawa-ken, JP;
Takayuki Teraguchi, Kanagawa-ken, JP;
Masahiro Hasegawa, Kanagawa-ken, JP;
Noriyoshi Odaki, Kanagawa-ken, JP;
Shigehiro Hosoi, Hyogo-ken, JP;
Takahiro Nakagawa, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a power detector includes a reference voltage generator, a square signal generator, a detection circuit, and an output circuit. The reference voltage generator is configured to receive a bias voltage and generate a reference voltage. The square signal generator is configured to receive a voltage having a high frequency input voltage superimposed on the bias voltage and output a signal including the reference voltage, a voltage of a square of the high frequency input voltage, and a high-frequency signal. The detection circuit has a first lowpass filter, a first operational amplifier configured to amplify error between an output voltage of the first lowpass filter and the reference voltage and output the error as a control voltage, and a feedback transistor configured to feed a feedback current according to the control voltage back to an output terminal of the square signal generator.