US 11,879,963 B2
Oscillator circuit, corresponding radar sensor, vehicle and method of operation
Alessandro Parisi, Mascalucia (IT); Andrea Cavarra, Catania (IT); Alessandro Finocchiaro, Catania (IT); Giuseppe Papotto, Biancavilla (IT); and Giuseppe Palmisano, s. Giovanni la Punta (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Feb. 13, 2023, as Appl. No. 18/108,993.
Application 18/108,993 is a continuation of application No. 17/395,016, filed on Aug. 5, 2021, granted, now 11,604,267.
Claims priority of application No. 102020000019786 (IT), filed on Aug. 7, 2020.
Prior Publication US 2023/0194694 A1, Jun. 22, 2023
Int. Cl. G01S 13/58 (2006.01); G01S 13/931 (2020.01); H03B 5/12 (2006.01); H03L 7/193 (2006.01); H03L 7/10 (2006.01); G01S 7/40 (2006.01); H03L 7/099 (2006.01)
CPC G01S 13/584 (2013.01) [G01S 7/4056 (2013.01); G01S 13/931 (2013.01); H03B 5/1212 (2013.01); H03B 5/1228 (2013.01); H03B 5/1243 (2013.01); H03B 5/1265 (2013.01); H03B 5/1293 (2013.01); H03L 7/099 (2013.01); H03L 7/101 (2013.01); H03L 7/103 (2013.01); H03L 7/193 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A circuit, comprising:
a tunable resonance circuit comprising:
an inductance directly electrically connected between first and second nodes;
a variable capacitance directly electrically connected between the first and second nodes; and
a set of switched capacitances coupled between the first and second nodes, the set of switched capacitances including a plurality of capacitance units, each capacitance unit comprising a first capacitance for that capacitance unit directly electrically connected between the first node and a switch and a second capacitance for that capacitance unit directly electrically connected between the switch and the second node;
control circuitry configured to receive an input control signal and connected to control the switches of the set of switched capacitances; and
a biasing circuit directly electrically connected to the tunable resonance circuit at the first and second nodes;
wherein the inductance comprises first and second inductors directly electrically connected in series between the first and second nodes, with a tap between the first and second inductors coupled to receive the input control signal.