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1. (WO2018123199) FREQUENCY SWEEP OSCILLATION CIRCUIT 


IPC:  H03L 7/12 G01S 7/28 H03L 7/197 

Applicants:  SOCIONEXT INC. 株式会社ソシオネクスト 

Inventors:  IRIE Masatake 入江 正丈 
Title:  FREQUENCY SWEEP OSCILLATION CIRCUIT 
Abstract: 
A frequency divider control circuit (15) outputs, to a frequency divider (14), a frequency divider control signal for increasing a frequency division ratio N from a first frequency division ratio to a second frequency division ratio larger than the first frequency division ratio during an upchirp period, reducing the frequency division ratio N from the second frequency division ratio to a third frequency division ratio larger than the first frequency division ratio but smaller than the second frequency division ratio during a blank period, and returning the frequency division ratio N to a first frequency division ratio. Control is executed so as to set the absolute value of the time change rate of the frequency division ratio N in the reduction from the third frequency division ratio to the first frequency division ratio during the blank period to be lower than that of the time change rate of the frequency division ratio N in the reduction from the second frequency division ratio to the third frequency division ratio during the blank period.
