US 12,015,243 B2
Apparatus for compensating parasitic impedance for integrated circuits
Denise Tingxi Lee, Cambridgeshire (GB); Neale Dutton, Edinburgh (GB); Nicolas Moeneclaey, Vourey (FR); and Jerome Andriot-Ballet, St Nizier du Moucherotte (FR)
Assigned to STMICROELECTRONICS (RESEARCH & DEVELOPMENT ) LIMITED, Marlow (GB); and STMICROELECTRONICS (GRENOBLE 2) SAS, Grenoble (FR)
Filed by STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, Marlow (GB); and STMICROELECTRONICS (GRENOBLE 2) SAS, Grenoble (FR)
Filed on Apr. 13, 2022, as Appl. No. 17/720,139.
Application 17/720,139 is a continuation of application No. 16/743,856, filed on Jan. 15, 2020, granted, now 11,336,076.
Claims priority of application No. 19305053 (EP), filed on Jan. 16, 2019.
Prior Publication US 2022/0239059 A1, Jul. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01S 5/026 (2006.01); H01S 5/042 (2006.01); H01S 5/183 (2006.01)
CPC H01S 5/0261 (2013.01) [H01S 5/042 (2013.01); H01S 5/183 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A laser diode driver circuit comprising:
a plurality of connection paths including:
a first pair of connection paths each coupled to an anode of a laser diode, the first pair of connection paths including a first connection path and a second connection path, a first inductance of the first connection path being substantially equal to a second inductance of the second connection path; and
a second pair of connection paths each coupled to a cathode of the laser diode, the second pair of connection paths including a third connection path and a fourth connection path, a third inductance of the third connection path being substantially equal to a fourth inductance of the fourth connection path; and
current driving circuitry, configured to drive one or more current passing through one or more connection paths of the plurality of connection paths, the current driving circuitry including:
a first switch configured to selectively couple the first connection path to a high potential supply node;
a first diode having a cathode coupled to the high potential supply node and an anode:
a first current source configured to provide a first current and
a second switch configured to selectively couple the second connection path to the anode of the first diode or to a low potential supply node via the first current source.