Yogi K Puri

Title: Yogi K. Puri: Semiconductor Circuit and Testing Innovations

Introduction

Yogi K. Puri is an inventor based in Vienna, Virginia. His work includes innovations in semiconductor circuit design and methods for testing high-performance logic. He is associated with International Business Machines Corporation (IBM) and is credited with 4 patents.

Latest Patents

One of Puri’s patents, “Low Threshold BiCMOS Circuit,” describes a BiCMOS NAND circuit that combines low-threshold n-channel field-effect transistors with standard-threshold n-channel and p-channel transistors. The design aims to maintain circuit performance as devices become smaller and supply voltages decrease, while remaining compatible with standard CMOS circuits.

Another patent, “Testing Method for Assuring AC Performance of High Performance Random Logic,” presents a way to test high-speed random logic using a low-speed tester. The method divides AC testing into phases, first accounting for the timing difference between the product’s required cycle time and the tester’s cycle time. Later phases adjust strobe times at staging latches to compensate for that difference. The approach can be applied to logic circuits with multiple staging latches and combinatorial logic blocks.

Career Highlights

Puri’s patent work addresses two important engineering challenges: preserving performance as semiconductor devices scale down and verifying high-speed logic with more accessible testing equipment. These inventions reflect a focus on practical circuit design and test methods.

Collaborations

Puri’s listed coworkers include Prem Puri and Keith M. Selbo. His association with IBM places his work within a company with a substantial history of semiconductor research and development.

Conclusion

Yogi K. Puri’s patents highlight contributions to scalable BiCMOS circuit design and efficient testing of high-performance logic.