The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Oct. 21, 2022
Psemi Corporation, San Diego, CA (US);
Buddhika Abesingha, San Diego, CA (US);
PSEMI CORPORATION, San Diego, CA (US);
Abstract
Methods and devices for a cascode current mirror with low headroom voltage are presented. According to one aspect, a gate voltage to a cascode transistor of an input leg of the current mirror is provided by a feedback block that operates from a mirrored current output by an output leg of the current mirror. The feedback block includes a feedback current mirror that outputs a mirrored current for conduction through a self-biasing diode-connected transistor that generates the gate voltage to the cascode transistor of the input leg. According to yet another aspect, the cascode current mirror includes a start-up circuit coupled between an input to the input leg and a gate of the cascode transistor of the input leg, the start-up circuit generating a start-up voltage during a transition mode of operation of the cascode current mirror. According to one aspect, a transistor is used as the start-up circuit.