International Business Machines Corporation

One Million Metrics Corp.

Aditya Bansal

Jae-Joon Kim

Rahul M Rao

Amith Singhee

Haytham Elhawary

Sufi Zafar

Emrah Acar

Phillip John Restle

Alan J Drake

Ching-Te Kent Chuang

Thomas J Bucelot

Shih-Hsien Lo

Mrigank Sharad

David W Shan

Jeff Doong

Evan Roche

Mijael Damian

Derek Squires

Firdaus Janoos

Matthew Glazer

Marina Teper

Selim Youssry

Dureseti Chidambarrao

Keith Aelwyn Jenkins

Barry P Linder

Rama Nand Singh

Manjul Bhushan

Liang-Teck Pang

Kai Zhao

Ashish V Jagtiani

Pamela Castalino

Dallas M Lea

Enrique Ruiz De Villa

Methods and systems for monitoring workplace safety and evaluating risks is provided, the method comprising receiving signals from at least one wearable device, identifying portions of the signals corresponding to physical activities, excerpting the portions of the signals corresponding to the physical activities, and calculating risk metrics based on measurements extracted from the excerpted portions of the signals, the risk metric indicative of high risk lifting activities.

System and method for monitoring safety and productivity of physical tasks

A glucose sensor comprises a conducting back electrode. The glucose sensor also comprises a silicon substrate in electrical contact with the conducting back electrode. The glucose sensor also comprises a dielectric layer disposed on the silicon substrate. The glucose sensor also comprises a pH sensing layer disposed on the dielectric layer. The glucose sensor also comprises a chemical layer disposed on the pH sensing layer, wherein the chemical layer is in contact with an aqueous solution. The glucose sensor also comprises a conductive electrode disposed on the dielectric layer, where in the conductive electrode is in contact with the aqueous solution.

Metal-oxide-semiconductor capacitor based sensor

A method for monitoring workplace safety and evaluating risks during lifting activities is provided, the method comprising receiving signals from wearable first and second devices, identifying portions of the signals corresponding to lifting activities, excerpting the portions of the signals corresponding to lifting activities, and calculating risk metrics based on measurements extracted from the excerpted portions of the signals, the risk metric indicative of high risk lifting activities.

A clock driver is provided. The clock driver includes a multi-stage delay cell having an input, a positive pulse driving branch, a negative pulse driving branch, and an output. The input is for receiving an original version of a reference clock signal input to the clock driver and used to generate a global clock signal. The output is connected to the positive pulse driving branch and the negative pulse driving branch. The clock driver further includes a pulse generator having positive and negative pulse generator portions respectively connected to outputs of the positive and negative pulse driving branches. The pulse generator generates, at any given time, one of a positive pulse and a negative pulse responsive to a positive pulse enable signal and a negative pulse enable signal, respectively, and the original version of the reference clock signal input to the clock driver without modification.

Clock buffers with pulse drive capability for power efficiency

A clock driver and corresponding method are provided. The clock driver includes a multi-stage delay cell having logic circuitry and a plurality of serially connected delay elements. An input of the delay elements receives an original version of a reference clock signal input to the clock driver and used to generate a global clock signal. An output of the delay elements connects to positive and negative pulse driving branches formed from the logic circuitry. The clock driver further includes a pulse generator forming positive and negative pulse generator portions respectively connected to outputs of the positive and negative pulse driving branches. The pulse generator generates, at any given time, one of a positive pulse and a negative pulse responsive to a positive pulse enable signal and a negative pulse enable signal, respectively, and the original version of the reference clock signal input to the clock driver without modification.

A system has at least a first circuit portion and a second circuit portion. The first circuit portion is operated at normal AC frequency. The second circuit portion is operated in a back-up mode at low AC frequency, such that the second circuit portion can rapidly come-online but has limited temperature bias instability degradation. The second circuit portion can then be brought on-line and operated at the normal AC frequency. A system including first and second circuit portions and a control unit, as well as a computer program product, are also provided.

Reducing performance degradation in backup semiconductor chips

A logic circuit is operated in a normal mode, with a supply voltage coupled to a supply rail of the logic circuit, and with a ground rail of the logic circuit grounded; It is determined that at least a portion of the logic circuit has experienced degradation due to bias temperature instability. Responsive to the determining, the logic circuit is operated in a power napping mode, with the supply voltage coupled to the ground rail of the circuit, with the supply rail of the circuit grounded, and with primary inputs of the circuit toggled between logical zero and logical one at low frequency. A logic circuit and corresponding design structures are also provided.

Power napping technique for accelerated negative bias temperature instability (NBTI) and/or positive bias temperature instability (PBTI) recovery

Methods and systems for computing threshold voltage degradation of transistors in an array of memory cells are disclosed. In accordance with one method, a process that models an expected usage of the array is selected. In addition, a hardware processor can run the process to populate the array with data over time to simulate the expected usage of the array. The method further includes compiling data that detail different durations at which each of the memory cells in the array stores 1 or at which each of the memory cells in the array stores 0. For each separate grouping of memory cells that share a common duration of the different compiled durations, a threshold voltage degradation is determined for each transistor in the corresponding grouping of cells based on at least one biased temperature instability model.

Usage-based temporal degradation estimation for memory elements

A physical test integrated circuit has a plurality of repeating circuit portions corresponding to an integrated circuit design. A first of the portions is fabricated with a nominal block mask location, and additional ones of the portions are deliberately fabricated with predetermined progressive increased offset of the block mask location from the nominal block mask location. For each of the portions, the difference in threshold voltage between a first field effect transistor and a second field effect transistor is determined. The predetermined progressive increased offset of the block mask location is in a direction from the first field effect transistor to the second field effect transistor. The block mask overlay tolerance is determined at a value of the progressive increased offset corresponding to an inflection of the difference in threshold voltage from a zero difference. A method for on-chip monitoring, and corresponding circuits, are also disclosed.

Circuit technique to electrically characterize block mask shifts

A method for estimating delay deterioration in an integrated circuit comprising estimating degradation in at least one characteristic of each device defined within the integrated circuit using voltages and logic values monitored during a simulation of the digital circuit. Generating an end-of-life netlist in which the at least one device characteristic of each device has been modified to reflect the estimated degradation or estimating a change in timing delay of each device directly from the estimated degradation of the at least one characteristic of each device. A timing analysis is performed using the estimated change in timing delay of each device to determine circuit path delays. The timing analysis is static or statistical.

Estimating delay deterioration due to device degradation in integrated circuits

A method is disclosed for evaluating a model, characterized as being a computer executable device and circuit simulator. The method includes accepting measured parameters of devices, which devices are essentially identical with, or are actually from, a simulated circuit instance. The model is executed with adjusted input parameters to generate simulated values for properties of the circuit instance. These simulated values are compared with measured values of the same properties. The goodness of the model is determined based on the degree of direct, or statistical, agreement between the simulated and measured values.

Circuit-level validation of computer executable device/circuit simulators

A memory circuit includes a plurality of bit line structures (each including a true and a complementary bit line), a plurality of word line structures intersecting the plurality of bit line structures to form a plurality of cell locations; and a plurality of cells located at the plurality of cell locations. Each of the cells includes a logical storage element, a first access transistor selectively coupling a given one of the true bit lines to the logical storage element, and a second access transistor selectively coupling a corresponding given one of the complementary bit lines to the logical storage element. One or both of the first and second access transistors are configured with asymmetric current characteristics to enable independent enhancement of READ and WRITE margins. Also included within the 6-T scope are one or more design structures embodied in a machine readable medium, comprising circuits as set forth herein.

Growing community of inventors

White Plains, NY, United States of America

Aditya Bansal