US 12,111,676 B2
Bandgap circuit with low power consumption
Giulio Maria Iadicicco, Munich (DE); and Angelo Bassi, Munich (DE)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 19, 2022, as Appl. No. 17/947,465.
Prior Publication US 2024/0103557 A1, Mar. 28, 2024
Int. Cl. G05F 3/26 (2006.01)
CPC G05F 3/265 (2013.01) 20 Claims
OG exemplary drawing
 
1. A bandgap circuit comprising:
a voltage generator circuit including a pair of transistors each connected in a diode configuration and biased with a respective current source of a plurality of current sources of the voltage generator circuit; and
a sample and hold circuit coupled to the voltage generator circuit, the sample and hold circuit configured to:
sample, during a sample phase, a first voltage between a first base and a first emitter of a first transistor of the pair of transistors and a second voltage between a second base and a second emitter of a second transistor of the pair of transistors, and
generate, during a hold phase subsequent to the sample phase, an output voltage as a combination of the sampled first and second voltages.