Wide voltage range level shifter with reduced duty cycle distortion across operating conditions

US11228312B1 · kind B1 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Narender Ponna · Bengaluru, IN
• Sharad Gupta · New Delhi, IN
• Akhtar ALAM · Bengaluru, IN

Key dates

• Filing date: Jul 15, 2020
• Grant date: Jan 18, 2022
• Expiry date: Jul 15, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/018528
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

According to certain aspects, a level shifter includes a first branch including a first pull-up transistor configured to pull up a first node, and a first pull-down transistor configured to pull down the first node. The level shifter also includes a second branch including a second pull-up transistor configured to pull up a second node, and a second pull-down transistor configured to pull down the second node. The level shifter further includes a third branch including a third pull-up transistor configured to pull up a third node, and a third pull-down transistor configured to pull down the third node. The first branch is cross coupled with the third branch, the second branch is cross coupled with the third branch, the first pull-down transistor has a first channel width, the second pull-down transistor has a second channel width, and the first channel width is greater than the second channel width.