US 11,863,066 B2
Positive and negative charge pump control
Vikas Rana, Noida (IN); Marco Pasotti, Travaco'Siccomario (IT); and Fabio De Santis, Milan (IT)
Assigned to STMicroelectronics International N.V., Geneva (CH); and STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics International N.V., Geneva (CH); and STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Feb. 14, 2023, as Appl. No. 18/168,936.
Application 18/168,936 is a division of application No. 17/866,372, filed on Jul. 15, 2022, granted, now 11,611,275.
Application 17/866,372 is a division of application No. 17/145,107, filed on Jan. 8, 2021, granted, now 11,424,676, issued on Aug. 23, 2022.
Claims priority of provisional application 62/965,617, filed on Jan. 24, 2020.
Prior Publication US 2023/0198386 A1, Jun. 22, 2023
Int. Cl. H02M 3/07 (2006.01); G11C 5/14 (2006.01)
CPC H02M 3/07 (2013.01) [G11C 5/145 (2013.01); H02M 3/071 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A voltage supply circuit, comprising:
a first charge pump stage configured to generate a first voltage having a first polarity;
a second charge pump stage configured to generate a second voltage having a second polarity that is different from the first polarity;
an oscillator configured to output a clock signal to the first charge pump stage;
a regulator configured to supply the oscillator with a regulated voltage; and
a control stage configured to:
receive a voltage representative of a magnitude of the second voltage;
compare the voltage representative of the magnitude of the second voltage with a first reference voltage; and
in response to determining that the magnitude of the second voltage exceeds the first reference voltage, cause the regulator to decrease the regulated voltage.