Patent ID: 11923845
Assignee: APPLE INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An integrated circuit comprising:
a first functional circuit configured to operate using a first supply voltage;
a second functional circuit configured to operate using a second supply voltage different from the first supply voltage; and
a level shifter circuit coupled to receive, from the first functional circuit, and input signal generated using the first supply voltage, and configured to output, to the second functional circuit, a current output signal generated using the second supply voltage, wherein the level shifter circuit includes:
an input circuit configured to generate, using the first supply voltage and based on the input signal, first and second control signals;
a shifter circuit configured to generate first and second shifted signals using the first and second control signals, respectively, using the second supply voltage; and
a selection circuit configured to generate the current output signal using a value of a previous output signal and one of the first and second shifted signals.