Patent · US Active

Power gated lookup table circuitry

US10686446B2 · kind B2 · utility

0Cited by

8References

20Claims

0Family size

Assignee

Altera Corporation · US

Inventors

Bee Yee Ng · Bandar Jengka, MY
Hee Kong Phoon · Bagan Serai, MY
Teik Hong Ooi · Bagan Serai, MY
Guan Hoe Oh · Alor Setar, MY

Key dates

Filing date	Jun 26, 2017
Grant date	Jun 16, 2020
Priority date	—
Expiry date	Jun 26, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03K19/1776
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A programmable integrated circuit with lookup table circuitry is provided. The lookup table (LUT) circuitry may be formed using multiplexers. A multiplexer in the lookup table circuitry may be implemented using only tristate inverting circuits. Each tristate inverting circuit may include a first set of n-channel and p-channel transistors that receive a static control bit from a memory element and a second set of n-channel and p-channel transistors that receive true and complementary versions of a user signal. The first and second sets of transistors may be coupled in series between a positive power supply terminal and a ground power supply terminal. A LUT multiplexer implemented in this way need not include separate transmission gates at the output of each tristate inverting circuit and may exhibit minimal subthreshold leakage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.