US 11,719,802 B2
Radar front-end with RF oscillator monitoring
Florian Starzer, Ennsdorf Bei Enns (AT); Helmut Kollmann, Linz (AT); Alexander Melzer, Neutillmitsch (AT); Rainer Stuhlberger, Puchenau (AT); Roland Vuketich, Arbing (AT); and Mathias Zinnoecker, Linz (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Aug. 16, 2021, as Appl. No. 17/403,096.
Application 16/870,227 is a division of application No. 16/105,111, filed on Aug. 20, 2018, granted, now 10,684,363, issued on Jun. 16, 2020.
Application 17/403,096 is a continuation of application No. 16/870,227, filed on May 8, 2020, granted, now 11,137,489.
Claims priority of application No. 102017118987.4 (DE), filed on Aug. 18, 2017; and application No. 102018117688.0 (DE), filed on Jul. 22, 2018.
Prior Publication US 2021/0382159 A1, Dec. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 13/34 (2006.01); G01S 7/35 (2006.01); G01S 13/931 (2020.01); G01S 7/40 (2006.01); G01S 7/03 (2006.01); G01S 13/42 (2006.01); G01S 13/87 (2006.01)
CPC G01S 13/343 (2013.01) [G01S 7/352 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A radar chip, comprising:
a radio frequency (RF) contact;
an RF oscillator integrated in the radar chip;
at least one first demodulator integrated in the radar chip and comprising a first RF input and a first reference input, wherein the first RF input is coupled to the RF contact and the first reference input is coupled to an output of the RF oscillator,
wherein the first RF input of the at least one first demodulator is configured to receive a first RF oscillator signal via the RF contact from an external RF oscillator; and
a controller integrated in the radar chip and configured to determine a first propagation delay of the first RF oscillator signal arriving at the radar chip on a basis of information obtained from the at least one first demodulator.