Patents by Inventor David D. Wentzloff
David D. Wentzloff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11859764Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: GrantFiled: December 10, 2021Date of Patent: January 2, 2024Assignee: Everactive, Inc.Inventors: Jim Boley, Kyle Craig, Shadi Hawawini, Nathan E. Roberts, David D. Wentzloff, Benton H. Calhoun
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Publication number: 20230354196Abstract: A wake-up radio system in a wireless sensor network, the wake-up radio comprising: an analog front end configured to communicate with matching network; an analog to digital converter coupled to the analog front end; and a digital baseband coupled to the analog to digital converter, wherein the digital baseband outputs a fast wake-up signal and a secure wake-up signal, and wherein the wake-up radio listens to all channels simultaneously.Type: ApplicationFiled: July 7, 2023Publication date: November 2, 2023Applicant: Everactive, Inc.Inventors: David D. Wentzloff, Kuo-Ken Huang, Farah Bassam Yahya, Jonathan Kirk Brown, Richard Kevin Sawyer, JR., Nicholas Andrew Clark Collins, David Sharif Abdallah, Christopher Shaw
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Patent number: 11758480Abstract: A wake-up radio system in a wireless sensor network, the wake-up radio comprising: an analog front end configured to communicate with matching network; an analog to digital converter coupled to the analog front end; and a digital baseband coupled to the analog to digital converter, wherein the digital baseband outputs a fast wake-up signal and a secure wake-up signal, and wherein the wake-up radio listens to all channels simultaneously.Type: GrantFiled: February 15, 2021Date of Patent: September 12, 2023Assignee: EVERACTIVE INC.Inventors: David D. Wentzloff, Kuo-Ken Huang, Farah Bassam Yahya, Christopher John Lukas, Jonathan Kirk Brown, Richard Kevin Sawyer, Jr., Nicholas Andrew Clark Collins, David Sharif Abdallah, Christopher Shaw
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Patent number: 11709144Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: GrantFiled: December 10, 2021Date of Patent: July 25, 2023Assignee: Everactive, Inc.Inventors: Jim Boley, Kyle Craig, Shadi Hawawini, Nathan E. Roberts, David D. Wentzloff, Benton H. Calhoun
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Publication number: 20220099608Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: ApplicationFiled: December 10, 2021Publication date: March 31, 2022Inventors: Jim Boley, Kyle Craig, Shadi Hawawini, Nathan E. Roberts, David D. Wentzloff, Benton H. Calhoun
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Publication number: 20220099609Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: ApplicationFiled: December 10, 2021Publication date: March 31, 2022Inventors: Jim Boley, Kyle Craig, Shadi Hawawini, Nathan E. Roberts, David D. Wentzloff, Benton H. Calhoun
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Patent number: 11226302Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: GrantFiled: August 7, 2019Date of Patent: January 18, 2022Assignee: Everactive, Inc.Inventors: David D. Wentzloff, Benton H. Calhoun, Nathan E. Roberts, Tom O'Brien, Sean P. Mahnken
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Publication number: 20210258878Abstract: A wake-up radio system in a wireless sensor network, the wake-up radio comprising: an analog front end configured to communicate with matching network; an analog to digital converter coupled to the analog front end; and a digital baseband coupled to the analog to digital converter, wherein the digital baseband outputs a fast wake-up signal and a secure wake-up signal, and wherein the wake-up radio listens to all channels simultaneously.Type: ApplicationFiled: February 15, 2021Publication date: August 19, 2021Applicant: EVERACTIVE INC.Inventors: David D. Wentzloff, Kuo-Ken Huang, Farah Bassam Yahya, Christopher John Lukas, Jonathan Kirk Brown, Richard Kevin Sawyer, JR., Nicholas Andrew Clark Collins, David Sharif Abdallah, Christopher Shaw
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Patent number: 11044009Abstract: Embodiments include methods and apparatus for wireless network communication between a device that operates a radio in compliance with a wireless communication standard and another device that may not be capable of complying with the wireless communication standard. In an embodiment a sender of a wireless standard compliant message modulates backchannel data on a wireless standard compliant message. The wireless standard compliant message may be addressed to an IP address of a compliant device. However the compliant message may have no meaning for the addressee. A noncompliant device within wireless range of the compliant message receives the message and demodulates the backchannel information. The noncompliant device this does not require a wireless standard radio to be on in order to receive messages and can operate at very low power.Type: GrantFiled: April 13, 2016Date of Patent: June 22, 2021Assignee: EVERACTIVE, INC.Inventors: David D. Wentzloff, Benton H. Calhoun, Nathan E. Roberts, Nirmalendu Patra
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Patent number: 10992503Abstract: A transceiver includes a receive circuit configured to receive an incoming signal and recover a reference signal at a reference frequency from the incoming signal. The incoming signal is a wireless packet. A first oscillator generates a signal at a set of predetermined frequencies. A first phase lock loop (PLL) interfaced with the first oscillator. The first PLL is configured to adjust a first oscillator frequency of the first oscillator based on an incoming frequency of the incoming signal using the reference frequency. A transmit circuit includes a second oscillator configured to generate a carrier signal at a predetermined frequency and a modulator configured to modulate data over the carrier signal at the predetermined frequency. The transmit circuit includes a second PLL interfaced with the second oscillator that sets the second oscillator to generate the carrier signal at the predetermined frequency using the reference signal. The transmit circuit transmits the modulated carrier signal.Type: GrantFiled: February 14, 2020Date of Patent: April 27, 2021Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David D. Wentzloff, Abdullah Mohammed G Alghaihab, Xing Chen, Yao Shi
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Publication number: 20210116322Abstract: Methods and apparatus are described that relate to the monitoring of various types of components in pressurized systems. These may include batteryless monitors that run on power harvested from their environments, systems for acquiring monitor data for the components of a pressurized system, and/or techniques for processing monitor data to determine the status of the components and/or the system.Type: ApplicationFiled: October 16, 2019Publication date: April 22, 2021Inventors: Todd Klanderud, Shadi Hawawini, David D. Wentzloff
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Publication number: 20210041383Abstract: Devices, systems, and techniques relating to steam trap monitoring are described. These include battery-less steam trap monitors that run on power harvested from their environments, systems for acquiring steam trap monitor data for the traps in a facility or across multiple facilities, and techniques for processing steam trap monitor data to reliably determine the status of individual steam traps and potentially other system parameters.Type: ApplicationFiled: August 7, 2019Publication date: February 11, 2021Inventors: David D. Wentzloff, Benton H. Calhoun, Nathan E. Roberts, Tom O'Brien, Sean P. Mahnken
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Patent number: 10911078Abstract: A millimeter-scale Bluetooth low energy wireless transmitter is presented with a dual purpose loop antenna. The oscillator employs a high quality factor resonator formed by a printed 3.5×3.5 mm2 inductive loop antenna (simulated Q˜110) and an on-chip digitally-switched capacitor array (simulated Q˜283). The oscillator replaces the traditional voltage controlled oscillator plus power amplifier, achieving lower power consumption while maintaining phase noise of ?118.5 dBc/Hz at 1 MHz offset that results in low FSK modulation error (2.1%) and low frequency drift during BLE packet transmission.Type: GrantFiled: February 14, 2020Date of Patent: February 2, 2021Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David D. Wentzloff, Yao Shi, David T. Blaauw
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Patent number: 10732293Abstract: A quadrature fully integrated tri-band GPS receiver implemented in 65 nm CMOS. The analog front-end (AFE) is specifically designed for a miniaturized low-power GPS logger that leverages heavy duty-cycling. The main contribution of the RF front-end is comprised of two main signal paths which support the single-band only mode and the tri-band mode (L1, L2, L5). In the tri-band mode, the AFE is able to fold three GPS signals into a single low intermediate frequency channel in part due to the orthogonality of the pseudo-ransom codes. In active mode, the radio draws 12.1 mW in the single-band (L1) mode with a LNA and an active mixer, and 8.2 mW in the tri-band mode with a passive front-end, from a 1.2 V supply, and with a startup time of 20 us.Type: GrantFiled: December 13, 2017Date of Patent: August 4, 2020Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David D. Wentzloff, Hyeongseok Kim
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Patent number: 10667214Abstract: In some embodiments, an apparatus includes a wireless receiver circuit that can receive a wireless signal from a wireless communication device that is (1) separate from the wireless receiver circuit and (2) can encode a first information according to a protocol. The wireless receiver circuit can detect a predefined sequence of changes of a characteristic within the wireless signal to decode, from the wireless signal, a second information mutually exclusive from the first information without decoding the first information. In such embodiments, the wireless receiver circuit can send the second information.Type: GrantFiled: March 14, 2014Date of Patent: May 26, 2020Assignee: EVERACTIVE INC.Inventors: David D. Wentzloff, Benton H. Calhoun
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Patent number: 10572266Abstract: In some embodiments, an apparatus includes an integrated circuit such as a system on chip that operates in part from harvested power and that uses information about power harvesting conditions to alter a power-on sequence or boot sequence based on that information. In some embodiments, a method uses information about power harvesting and energy harvesting conditions to alter a power-on sequence or boot sequence.Type: GrantFiled: April 16, 2018Date of Patent: February 25, 2020Assignee: Everactive, Inc.Inventors: Benton H. Calhoun, David D. Wentzloff
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Patent number: 10567154Abstract: A Bluetooth Low-Energy (BLE) transmitter is presented for used in ultra-low-power radios in short range IoT applications. The power consumption of state-of-the-art BLE transmitter has been limited by the relatively power-hungry local oscillator due to the use of LC oscillators for superior phase noise performance. This disclosure addresses this issue by analyzing the phase noise limit of a BLE TX and proposes a ring oscillator-based solution for power and cost savings. The proposed transmitter features: 1) a wideband all-digital phase locked loop (ADPLL) featuring an fRF/4 RO, with an embedded 5-bit TDC; 2) a 4× frequency edge combiner to generate the 2.4 GHz signal; and 3) a switch-capacitor digital PA optimized for high efficiency at low transmit power levels. These not only help reduce the power consumption and improve phase noise performance, but also enhance the transmitter efficiency for short range applications.Type: GrantFiled: November 21, 2018Date of Patent: February 18, 2020Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David D. Wentzloff, Xing Chen
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Patent number: 10541843Abstract: An ultra-low power back-channel receiver is presented that demodulates binary a FSK back-channel signal embedded in 5.8 GHz IEEE 802.11a Wi-Fi OFDM packets. The architecture of the back-channel receiver employs a two-step down-conversion where the first mixing stage downconverts using the third harmonic of the local oscillator for power efficiency. The LP-65 nm CMOS receiver consumes 335 ?W with a sensitivity of ?72 dBm at a BER of 10?3 and data-rate of 31.25 kb/s. The radio uses a balun and a 250 kHz reference crystal as external components. The receiver uses a 1V supply voltage for analog blocks, and 0.85V for digital blocks including the local oscillator and the frequency-locked loop circuits.Type: GrantFiled: March 13, 2018Date of Patent: January 21, 2020Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David D. Wentzloff, Hun-Seok Kim, Jaeho Im
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Patent number: 10447318Abstract: A wireless communication device is presented for use with a sensor. The wireless communication device includes: an antenna, a driver circuit and a bias circuit. The driver circuit is electrically coupled to the antenna and includes at least one pair of cross-coupled transistors. The bias circuit is electrically coupled to the driver circuit. In a transmit mode, the bias circuit biases the driver circuit with a first bias current. In response to the first bias current, the driver circuit oscillates the antenna. In a receive mode, the bias circuit biases the driver circuit with a second bias current, such that the first bias current differs from the second bias current. In response to the second bias current, the bias circuit amplifies a signal received by the antenna.Type: GrantFiled: February 2, 2018Date of Patent: October 15, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGANInventors: David T. Blaauw, David D. Wentzloff, Li-Xuan Chuo, Hun-Seok Kim
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Publication number: 20190288887Abstract: An ultra-low power back-channel receiver is presented that demodulates binary a FSK back-channel signal embedded in 5.8 GHz IEEE 802.11a Wi-Fi OFDM packets. The architecture of the back-channel receiver employs a two-step down-conversion where the first mixing stage downconverts using the third harmonic of the local oscillator for power efficiency. The LP-65 nm CMOS receiver consumes 335 ?W with a sensitivity of ?72 dBm at a BER of 10?3 and data-rate of 31.25 kb/s. The radio uses a balun and a 250 kHz reference crystal as external components. The receiver uses a 1V supply voltage for analog blocks, and 0.85V for digital blocks including the local oscillator and the frequency-locked loop circuits.Type: ApplicationFiled: March 13, 2018Publication date: September 19, 2019Inventors: David D. WENTZLOFF, Hun-Seok KIM, Jaeho IM