US 11,870,348 B1
High speed, low quiescent current comparator
Narendra Nath Gaddam, Milpitas, CA (US); and Trey Roessig, Palo Alto, CA (US)
Assigned to Empower Semiconductor, Inc., San Jose, CA (US)
Filed by Empower Semiconductor, Inc., Milpitas, CA (US)
Filed on Aug. 19, 2021, as Appl. No. 17/406,429.
Claims priority of provisional application 63/071,771, filed on Aug. 28, 2020.
Int. Cl. H02M 3/158 (2006.01); G05F 1/62 (2006.01)
CPC H02M 3/1582 (2013.01) [G05F 1/62 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit device, comprising:
an input stage configured to receive a first input signal and a second input signal and generate a first voltage based on the first input signal and generate a second voltage based on the second input signal;
an amplification stage configured to generate a first output current based on the first voltage and generate a second output current based on the second voltage;
a bias stage configured to generate a bias voltage for the amplification stage based on the first voltage and the second voltage;
a load stage configured to output a differential voltage signal based on a comparison of the first output current and the second output current, wherein the differential voltage signal is proportional to a current through a device for which current is sensed; and
an output stage configured to output a signal to control a duty cycle of the device for which current is sensed based on the differential voltage signal generated by the load stage.