US 12,283,952 B2
Voltage level shifter with multi-step programmable high supply voltage and high supply voltage-dependent variable low supply and gate bias voltages
Siva Kumar Chinthu, Bangalore (IN); Venkatesh Periyapatna Gopinath, Fremont, CA (US); Suresh Pasupula, Bangalore (IN); and Devesh Dwivedi, Bengaluru (IN)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Jul. 11, 2023, as Appl. No. 18/350,327.
Prior Publication US 2025/0023566 A1, Jan. 16, 2025
Int. Cl. H03K 19/00 (2006.01); H03K 19/0185 (2006.01); H03K 19/20 (2006.01)
CPC H03K 19/018521 (2013.01) [H03K 19/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a voltage level shifter having a low supply voltage node, a high supply voltage node, and multiple transistors;
a programmable voltage generator outputting a high supply voltage to the high supply voltage node;
a first variable voltage generator outputting a low supply voltage to the low supply voltage node, wherein the low supply voltage is dependent on and less than the high supply voltage; and
a second variable voltage generator outputting a gate bias voltage to gates of at least some of the multiple transistors, wherein the gate bias voltage is dependent on and less than the high supply voltage.