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:
Oct. 09, 2012
Filed:
Sep. 13, 2010
Hiroki Sakurai, Fuchu, JP;
Hiroki Sakurai, Fuchu, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, an FMCW signal generation circuit includes a voltage-controlled oscillator, a digital phase detector, a differentiator, a comparator, a low-pass filter, an amplifier, a D/A converter, and an integrator. The voltage-controlled oscillator generates an FMCW signal including an oscillation frequency corresponding to a control signal. The digital phase detector detects phase information of the FMCW signal to generate a detection signal. The differentiator differentiates the detection signal once to generate a differential signal. The comparator compares the differential signal with a target frequency to generate an error signal. The low-pass filter suppresses a high-frequency component of the error signal to generate a filtered signal. The amplifier amplifies the filtered signal to generate an amplified signal. The D/A converter converts the amplified signal to analog to generate an analog signal. The integrator integrates the analog signal to generate the control signal.