US 12,431,878 B2
Low-swing Schmitt triggers
Santosh Mahadeo Narawade, Bangalore (IN); Jithin K, Bangalore (IN); and Mohit Gupta, San Jose, CA (US)
Assigned to Alphawave Semi, Inc., Milpitas, CA (US)
Filed by Alphawave Semi, Inc., Milpitas, CA (US)
Filed on Mar. 9, 2022, as Appl. No. 17/690,583.
Application 17/690,583 is a division of application No. 16/827,989, filed on Mar. 24, 2020, granted, now 11,296,683.
Prior Publication US 2022/0200586 A1, Jun. 23, 2022
Int. Cl. H03K 3/3565 (2006.01); H03K 3/356 (2006.01)
CPC H03K 3/3565 (2013.01) [H03K 3/356104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a Schmitt trigger including an input node, an output node, and a feedback node that is configured to bear a feedback voltage level that is a sum of an input voltage level at the input node and an attenuated voltage level of the output node;
a current source directly connected to the output node; and
a voltage sensor directly connected to the feedback node and configured to cause the current source to pull up an output voltage level at the output node responsive to the feedback voltage level crossing a threshold.