US 11,916,549 B1
Two-stage high speed level shifter
Shiv Harit Mathur, Bangalore (IN); and Sai Ravi Teja Konakalla, Bangalore (IN)
Assigned to SANDISK TECHNOLOGIES LLC, Addison, TX (US)
Filed by SanDisk Technologies LLC, Addison, TX (US)
Filed on Aug. 29, 2022, as Appl. No. 17/898,263.
Int. Cl. H03K 19/0185 (2006.01); H03K 3/037 (2006.01)
CPC H03K 19/018521 (2013.01) [H03K 3/037 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A voltage level shifter, comprising:
a first cross-coupled latch comprising a first latch transistor and a second latch transistor, wherein a drain terminal of the first latch transistor is connected to a gate terminal of the second latch transistor and a drain terminal of the second latch transistor is connected to a gate terminal of the first latch transistor;
a plurality of overdrive control transistors comprising a first subset of transistors having gate terminals connected to a first reference voltage and a second subset of transistors having gate terminals connected to a second reference voltage, wherein source terminals of the second subset of transistors are connected to the first cross-coupled latch; and
a first plurality of pull-down transistors comprising a first pull-down transistor and a second pull-down transistor, wherein a drain terminal of the first pull-down transistor and a drain terminal of the second pull-down transistor are connected to source terminals of the first subset of transistors.