US 12,265,409 B1
Radiation tolerant bandgap reference
Shinichi Hisano, Colorado Springs, CO (US)
Assigned to Frontgrade Technologies Inc., Arlington, VA (US)
Filed by Frontgrade Technologies Inc., Arlington, VA (US)
Filed on Dec. 30, 2022, as Appl. No. 18/148,649.
Int. Cl. G05F 1/56 (2006.01); G05F 3/30 (2006.01)
CPC G05F 1/56 (2013.01) 19 Claims
OG exemplary drawing
 
1. A compensation circuit for a bandgap reference circuit, comprising:
a compensation transistor, wherein the compensation transistor has a size and one or more bias conditions that are based at least in part on a respective bipolar transistor of the bandgap reference circuit; and
a compensation operational amplifier configured to:
(i) set a base-collector voltage of the compensation transistor to zero; and
(ii) provide a compensation base current to a base terminal of the compensation transistor that is representative of at least a radiation-induced current for the respective bipolar transistor.