US 12,405,352 B2
Signal generation circuit, radar apparatus, and signal control method
Chiang-Hua Yeh, Taipei (TW)
Assigned to RichWave Technology Corp., Taipei (TW)
Filed by RichWave Technology Corp., Taipei (TW)
Filed on Dec. 27, 2022, as Appl. No. 18/088,780.
Claims priority of application No. 111146073 (TW), filed on Dec. 1, 2022.
Prior Publication US 2024/0183938 A1, Jun. 6, 2024
Int. Cl. G01S 7/282 (2006.01); H03D 7/14 (2006.01)
CPC G01S 7/282 (2013.01) [H03D 7/1458 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A signal generation circuit, comprising:
a digital-to-analog converter (DAC) configured to convert an input digital signal into a first signal and a second signal in a first mode, wherein a coding content of the input digital signal comprises a plurality of bits;
a mixer coupled to the digital-to-analog converter and configured to respectively input the first signal and the second signal to two input ports of the mixer in the first mode so as to generate an output signal, wherein the output signal has a first output power corresponding to the input digital signal having a first coding content, the output signal has a second output power corresponding to the input digital signal having a second coding content, the second output power is different from the first output power, and an intensity of the output signal is related to a voltage difference between the first signal and the second signal,
a waveform of a carrier signal comprises a first segment and a second segment in a time domain,
the frequency in the first segment increases with time, and the frequency in the second segment decreases with time,
a turning segment is formed between the first segment and the second segment,
the first signal, the second signal, and the carrier signal are input to the mixer, and
an amplitude of the output signal corresponding to the turning segment is different from amplitudes of the output signal corresponding to the first segment and the second segment.