Efficient lookup table modules for user-programmable integrated circuits

US10523208B2 · kind B2 · utility

Assignee

• Microsemi SoC Corp. · US

Inventors

• Volker Hecht · Barsinghausen, DE
• Jonathan W. Greene · Palo Alto, US

Key dates

• Filing date: Oct 31, 2018
• Grant date: Dec 31, 2019
• Expiry date: Oct 31, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/17748
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A 4-input lookup table module including eight first-rank 2-input multiplexers, four second-rank multiplexers, two third-rank multiplexers, and one fourth-rank multiplexer, the first-rank through fourth-rank multiplexers forming a tree structure. A select input of the fourth-rank multiplexer is coupled to a first input node. Select inputs of the third-rank multiplexers are coupled to a second input node. Select inputs of a first and a second adjacent ones of the second rank 2-input multiplexers are electrically isolated from select inputs of a third and a fourth adjacent ones of the second rank 2-input multiplexers. Select inputs of a first through a fourth adjacent ones of the first rank 2-input multiplexers are electrically isolated from select inputs of a fifth through an eighth adjacent ones of the first rank 2-input multiplexers.