US 12,155,393 B2
Reference oscillator arrangement, radar system and synchronization method
Timo Jaeschke, Hattingen (DE); and Simon Kueppers, Bochum (DE)
Assigned to 2pi-Labs GmbH, Bochum (DE)
Appl. No. 17/310,230
Filed by 2pi-Labs GmbH, Bochum (DE)
PCT Filed Feb. 19, 2021, PCT No. PCT/EP2021/054132
§ 371(c)(1), (2) Date Jul. 27, 2021,
PCT Pub. No. WO2021/165459, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 20158599 (EP), filed on Feb. 20, 2020; and application No. 20192395 (EP), filed on Aug. 24, 2020.
Prior Publication US 2022/0278688 A1, Sep. 1, 2022
Int. Cl. H03L 7/099 (2006.01); G01S 7/35 (2006.01); G01S 7/40 (2006.01); G01S 13/34 (2006.01); H03B 5/32 (2006.01)
CPC H03L 7/099 (2013.01) [G01S 7/352 (2013.01); G01S 7/4021 (2013.01); G01S 13/34 (2013.01); H03B 5/32 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A reference oscillator arrangement, comprising:
a first reference oscillator configured to generate a first output signal,
a second reference oscillator configured to generate a second output signal,
a phase-locked loop configured to control the frequency of the second reference oscillator to the frequency of the first reference oscillator and/or configured to control the phase of the second reference oscillator to the phase of the first reference oscillator,
a control input for an external calibration signal,
the reference oscillator arrangement configured to match the frequency and/or phase of the first reference oscillator to the external calibration signal, and
a control unit configured to couple the calibration signal to the phase locked loop so that the phase locked loop synchronizes the second reference oscillator with the calibration signal.