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

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.