Patent ID: 9444463
Filing Date: 2016-09-13
CPC Classification: H03K

Claim Text:
1. A voltage level shifter, comprising: a main level shifting core, wherein the main level shifting core shifts a data signal from a first voltage domain to a second voltage domain; and a configuration block, wherein the configuration block configures the main level shifting core as a function of the shifted data signal, wherein the data signal is a differential signal having an unbiased data signal and a biased data signal, wherein the main level shifting core comprises two branches connected in parallel across a predefined voltage and ground, wherein the first branch comprises a first P-type metal-oxide-semiconductor (“PMOS”) transistor, a second PMOS transistor, a first N-type metal-oxide-semiconductor (“NMOS”) transistor, and a second NMOS transistor, wherein the first and second NMOS transistors are connected in parallel, wherein the first PMOS transistor and the second PMOS transistor are connected in series to the first and second NMOS transistors at a first connection, wherein the second branch comprises a third PMOS transistor, a fourth PMOS transistor, a third NMOS transistor, and a fourth NMOS transistor, wherein the third and fourth NMOS transistors are connected in parallel, wherein the third PMOS transistor and the fourth PMOS transistor are connected in series to the third and fourth NMOS transistors at a second connection, wherein the unbiased data signal is applied to the gates of the first PMOS transistor and the first NMOS transistor, wherein the biased data signal is applied to the gates of the third PMOS transistor and the third NMOS transistor, wherein the gates of the second PMOS transistor and the second NMOS transistor are connected to the second connection, wherein a shifted unbiased data signal is generated at the second connection, wherein the gates of the fourth PMOS transistor and the fourth NMOS transistor are connected to the first connection, and wherein a shifted biased data signal is generated at the first connection.