Patent · US Active

Compressed scan chains with three input mask gates and registers

US10591540B2 · kind B2 · utility

7Cited by

16References

8Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Prakash Narayanan · Bengaluru, IN
Rubin Ajit Parekhji · Bengaluru, IN
Arvind Jain · Sunnyvale, US
Sundarrajan Subramanian · Savanuru, IN

Key dates

Filing date	Mar 19, 2018
Grant date	Mar 17, 2020
Priority date	—
Expiry date	Jun 8, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/318547
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.

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