Qualcomm Incorporated

Vmware, Inc.

University of Washington

Ali Najafi

Andreas Georg Nowatzyk

Joshua R Smith

Michael Wei

Shervin Moloudi

Shyamnath Gollakota

Soheil Golara

Vamsi Talla

Amy Tai

Bryce Kellogg

Rabih Makarem

Mehrdad Hessar

Described herein are systems, methods, and software to manage time calibration associated with an oscillator of a computing system. In one example, a computing system monitors clock cycles for an oscillator on the computing system, receives timing messages from a server, and calculates the frequency of the oscillator at intervals based on the monitored clock cycles and timing messages. The computing system further identifies a temperature from a temperature sensor at each of the intervals and generates a function to demonstrate frequency of the oscillator versus temperatures from the temperature sensor based on the identified temperatures and frequencies at the intervals.

Clock calibration in a computing system using temperature sensors

Examples of backscatter systems, device, and techniques are described herein. Example backscatter devices may utilize CSS modulation to provide backscatter signals including CSS signals (e.g., LoRa packets). Utilizing CSS modulation may advantageously allow for backscatter communication over wide areas. Examples of backscatter devices described herein may toggle the impedance of the backscatter device between multiple (e.g., eight) impedances to reduce and/or eliminate higher order harmonic components in the backscatter signal (e.g., third and fifth harmonic components).

Backscatter systems, devices, and techniques utilizing CSS modulation and/or higher order harmonic cancellation

A Pierce oscillator is provided with a transconductance amplifier transistor having a DC drain voltage that is regulated to equal a reference voltage independently from a DC gate voltage for the transconductance amplifier transistor.

Low power crystal oscillator

Growing community of inventors

Seattle, WA, United States of America

Ali Najafi