US 12,292,752 B2
Electronic systems for integrated circuits and voltage regulators
Aurelien Mozipo, Portland, OR (US); Archanna Srinivasan, San Jose, CA (US); Guang Chen, Fremont, CA (US); and Janani Chandrasekhar, San Jose, CA (US)
Assigned to Altera Corporation, San Jose, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Sep. 24, 2020, as Appl. No. 17/031,446.
Prior Publication US 2021/0004032 A1, Jan. 7, 2021
Int. Cl. G05F 1/56 (2006.01); H03K 17/22 (2006.01); H03K 19/17736 (2020.01)
CPC G05F 1/56 (2013.01) [H03K 17/22 (2013.01); H03K 19/17736 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic system comprising:
first and second integrated circuit dies;
a third integrated circuit die comprising a first voltage regulator circuit, wherein a first supply voltage output of the first voltage regulator circuit is coupled to provide a first supply voltage to a first supply voltage input of the first integrated circuit die, and wherein the first voltage regulator circuit generates a first power ready signal that indicates when the first supply voltage has reached a first threshold voltage;
a fourth integrated circuit die comprising a second voltage regulator circuit that generates a second supply voltage, wherein a second supply voltage output of the second voltage regulator circuit is coupled to provide the second supply voltage to a second supply voltage input of the second integrated circuit die, wherein the second voltage regulator circuit generates a second power ready signal that indicates when the second supply voltage has reached a second threshold voltage; and
a logic gate circuit comprising a first input coupled to receive the first power ready signal, a second input coupled to receive the second power ready signal, and an output that generates a third power ready signal based on the first and the second power ready signals; and
a fifth integrated circuit die comprising a power-on reset monitoring circuit, wherein the power-on reset monitoring circuit generates a power-on reset signal for the fifth integrated circuit die in response to a third supply voltage generated by a third voltage regulator circuit.