US 12,306,656 B2
Bandgap reference generation for multiple power supply domains
Bang Li Liang, Ottawa (CA); and Gregory Edward Babcock, Ottawa (CA)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jun. 9, 2023, as Appl. No. 18/332,208.
Claims priority of provisional application 63/366,706, filed on Jun. 21, 2022.
Prior Publication US 2023/0409068 A1, Dec. 21, 2023
Int. Cl. G05F 3/30 (2006.01)
CPC G05F 3/30 (2013.01) 20 Claims
OG exemplary drawing
 
1. A bandgap reference generator comprising:
a low voltage bandgap reference circuit configured to generate a first bandgap reference voltage over a first range of a power supply voltage;
a high voltage bandgap reference circuit configured to generate a second bandgap reference voltage over a second range of the power supply voltage that is greater than the first range;
a bandgap selector circuit configured to output a selected bandgap reference voltage by selecting the first bandgap reference voltage or the second bandgap reference voltage based on a voltage level of the power supply voltage;
a bandgap translator circuit configured to generate a buffered bandgap reference voltage based on the selected bandgap reference voltage; and
a coarse bandgap reference circuit configured to generate a third bandgap reference voltage, the bandgap selector circuit further configured to compare the voltage level of the power supply voltage to the third bandgap reference voltage.