US 11,694,756 B2
Power circuit, electronic fuse circuit, and method for providing power to electronic fuse circuit
Chia Wei Ho, Nantou County (TW); Min Chia Wang, New Taipei (TW); Chung Ming Lin, Hsinchu (TW); and Jin Pang Chi, Taipei (TW)
Assigned to UNITED MICROELECTRONICS CORP., Hsinchu (TW)
Filed by United Microelectronics Corp., Hsinchu (TW)
Filed on Apr. 7, 2021, as Appl. No. 17/224,692.
Claims priority of application No. 110103818 (TW), filed on Feb. 2, 2021.
Prior Publication US 2022/0246226 A1, Aug. 4, 2022
Int. Cl. G11C 17/18 (2006.01); G11C 17/16 (2006.01); H03K 17/687 (2006.01)
CPC G11C 17/18 (2013.01) [G11C 17/16 (2013.01); H03K 17/6871 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power circuit, adapted for providing a programming voltage to an electronic fuse circuit, the power circuit comprising:
a pass transistor of a P-type metal-oxide-semiconductor comprising a bulk electrode, a gate electrode, a source electrode receiving a system high voltage, and a drain electrode connected to a bit line;
a bulk voltage control circuit independently providing a bulk voltage to the bulk electrode; and
a buffer circuit connected to the gate electrode of the pass transistor,
wherein a last-stage buffer of the buffer circuit is activated by the bulk voltage to control the pass transistor, wherein the bulk voltage control circuit comprises:
a first P-type metal-oxide-semiconductor transistor comprising a first source electrode connected to an operation voltage, a first drain electrode connected to an output node, and a first gate electrode; and
a second P-type metal-oxide-semiconductor transistor comprising a second source electrode connected to the system high voltage, a second drain electrode connected to the output node for providing the bulk voltage, and a second gate electrode.