Patent ID: 8284099
Filing Date: 2012-10-09
Classification: G01S

Abstract:
1. An FMCW signal generation circuit comprising: a voltage-controlled oscillator unit configured to generate an FMCW signal including an oscillation frequency corresponding to a control signal; a digital phase detector unit configured to detect phase information of the FMCW signal to generate a detection signal; a differentiator unit configured to differentiate the detection signal once to generate a differential signal including information of the oscillation frequency; a comparator unit configured to compare the differential signal with a target frequency to generate an error signal; a low-pass filter unit configured to suppress a high-frequency component of the error signal to generate a filtered signal; an amplifier unit configured to amplify the filtered signal to generate an amplified signal; a D/A converter unit configured to convert the amplified signal to analog to generate an analog signal; and an integrator unit configured to integrate the analog signal to generate the control signal.