Patent ID: 11961835
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 7:
8. An electronic circuit comprising:
an active field effect transistor (FET) that includes an active source, an active drain, and a common gate;
a reference FET, formed in a same semiconductor structure as the active FET, that includes a reference source, a reference drain, and the common gate, wherein the active FET and the reference FET both are pFET, and are stacked on each other at the common gate;
a differential current sense circuit (DCSC); and
a plurality of switches that selectively electrically connect the reference source of the reference FET to the differential current sense circuit or to ground voltage, and selectively electrically connect the active source of the active FET to the differential current sense circuit or to logic voltage;
wherein the DCSC is configured to measure and compare currents through each of the active and reference FETs when a threshold voltage is applied to the common gate and the active and reference sources are connected to the DCSC.