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:
Sep. 29, 2015
Filed:
Dec. 15, 2010
Hiroshi Kodama, Tokyo, JP;
Masaki Kitsunezuka, Tokyo, JP;
Hiroshi Kodama, Tokyo, JP;
Masaki Kitsunezuka, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A power detection circuit according to the present invention includes a variable frequency oscillatorfor oscillating a local oscillator frequency, a mixerfor receiving the local oscillator frequency and a detection signal and converting a frequency of the detection signal using the local oscillator frequency, a complex bandpass filterfor limiting a bandwidth of the detection signal whose frequency is converted to a predetermined bandwidth, and an energy detection circuitfor detecting power of the predetermined bandwidth based on an output from the complex bandpass filter. The local oscillator frequency is set so that the predetermined bandwidth of the detection signal whose frequency is converted is in a frequency range having low 1/f noise. According to the present invention, it is possible to provide a power detection circuit with high speed and high sensitivity.