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Rfmicron Inc patents


Recent patent applications related to Rfmicron Inc. Rfmicron Inc is listed as an Agent/Assignee. Note: Rfmicron Inc may have other listings under different names/spellings. We're not affiliated with Rfmicron Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "R" | Rfmicron Inc-related inventors


 new patent  Sensor with tail or transmission line for vehicle leak testing

A method begins by detecting a variance of one or more rf characteristics of a wireless sensor from a desired value of the one or more rf characteristics, due to exposure to an environmental condition. The tuning circuit is operably coupled to an antenna that includes a tail section that is located in a radio frequency (rf) limited area, and a head section that is located in a non-rf limited area. ... Rfmicron Inc

Method and apparatus for detecting rf field strength

A power detector for use in an rf receiver. The detector includes a power reference generator and a power quantizer. ... Rfmicron Inc

Radio frequency identification (rfid) tag(s) and sensor(s)

A method begins by a first radio frequency identification (rfid) sensor, that is associated with a first object element, receiving a first data request signal from an rfid reader and sending a first radio frequency (rf) signal that includes first data to the rfid reader in response to the first data request signal. The method continues with a second rfid sensor receiving a second data request signal from, and sending second data to, the rfid reader. ... Rfmicron Inc

Pressure based wireless sensor and applications thereof

A pressure sensing circuit for use with a wireless sensor that includes an antenna and a pressure sensing element. The antenna includes a first pole and a second pole and is operable to transceive radio frequency signals between the wireless sensor and a wireless data collecting device. ... Rfmicron Inc

Power harvesting circuit and applications thereof

A power harvesting circuit, a rectifier circuit and a capacitor. The rectifier circuit includes a diode circuit and a diode voltage reduction circuit. ... Rfmicron Inc

Power harvesting circuit and applications thereof

A power harvesting circuit a p-channel circuit, an n-channel circuit, an ac capacitance circuit, and an output capacitance circuit. The p-channel circuit includes a first diode element and a first start-up current circuit operably coupled to increase start-up current of the first diode element. ... Rfmicron Inc

Method and apparatus for sensing environment using a wireless passive sensor

A method for execution by a rfid tag includes receiving, from an rfid reader, an rf signal, where the rf signal has a carrier frequency of a plurality of carrier frequencies that span a broad frequency band. The method further includes adjusting input impedance of the rfid tag over a range of input impedances, where the input impedance of the rfid tag is based on one or more of impedance of the rfid tag's antenna and tank circuit. ... Rfmicron Inc

Method and apparatus for sensing an environmental condition during frequency hopping

A method includes receiving a series of radio frequency (rf) signals, where, from rf signal to rf signal of the series of rf signals, a carrier frequency is changed in accordance with a frequency hopping pattern. The method further includes, while receiving the series of rf signals, sensing an environmental condition by, for a frequency hop of at least some frequency hops of the frequency hopping pattern, adjusting a characteristic of a wireless sensor to maintain proximal alignment of a resonant frequency of the wireless sensor with the carrier frequency corresponding to a present frequency of the at least some frequency hops and generating a value to represent the adjustment of the characteristic, where a set of values is generated for the at least some frequency hops and where the set of values is used to determine a sensed value of the environmental condition.. ... Rfmicron Inc

Method and apparatus for sensing environmental conditions

A wireless sensor includes a radio frequency (rf) receiving circuit including a plurality of components, where impedances of the plurality of components establish a resonant frequency of the rf receiving circuit. The wireless sensor further includes a sensing element that when exposed to an environmental condition, affects the resonant frequency of the rf receiving circuit. ... Rfmicron Inc

Method and apparatus for sensing environment using a wireless passive sensor

A method begins with a first reader sending a first radio frequency (rf) signal prior to exposing a vehicle to moisture testing. The method continues with a second reader send a second rf signal after exposing the vehicle to moisture testing. ... Rfmicron Inc

Ac-to-dc charge pump having a charge pump and complimentary charge pump

An improved ac-to-dc charge pump for use, for example, in voltage generation circuits. In one embodiment, two 2-diode charge pumps are coupled in back-to-back configuration, and adapted to develop a substantially stable voltage on a mid-level rail. ... Rfmicron Inc

Received power level for tag processing prioritization

A method includes transmitting, by a radio frequency identification (rfid) reader, a series of rf signals to rfid tags in a time sequence. A first rf signal includes a first message for responding when received signal strength corresponds to a first power level and a second rf signal includes a second message for responding when the received signal strength of the rf signal corresponds to a second power level. ... Rfmicron Inc

Method and apparatus for detecting rf field strength

A radio frequency (rf) circuit comprises an antenna operably coupled to receive an rf signal, a power harvesting circuit operable to generate a first power source from the rf signal, a tank circuit coupled to the antenna and a tuning circuit. The tank circuit includes a selectively variable impedance and the tuning circuit is adapted to dynamically vary the selectively variable impedance of the tank circuit based on resonance of the rf circuit and frequency of the rf signal to substantially align the resonance of the rf circuit with the frequency of the rf signal. ... Rfmicron Inc

Radio frequency identification (rfid) moisture tag(s) and sensors with extended sensing via capillaries

A wireless sensor includes environment sensing structure, a radio frequency (rf) front-end, and a processing module. When the wireless sensor is positioned proximal to an object, a portion of the environment sensing structure senses an environmental condition in a remote area of the object that effects a characteristic of the rf front-end. ... Rfmicron Inc

07/13/17 / #20170201004

Radio frequency identification (rfid) tag(s) and sensor(s)

A wireless sensor includes an antenna, a sensing element, a tuning circuit, a processing module, a reference circuit block, and a transmitter. The tuning circuit adjusts the rf front-end to compensation for a change in a characteristic of the rf front end caused by the sensing element. ... Rfmicron Inc

06/08/17 / #20170162931

Wireless sensor with oppositely positioned antenna and sensing circuitry

A wireless sensor includes a substrate, an antenna, a sensing element, a transmission line, and a sensing integrated circuit (ic). The sensing element is positioned on one end of the substrate and the antenna is positioned on an opposite end of the substrate. ... Rfmicron Inc

06/08/17 / #20170160220

Wireless sensor with multiple sensing options

A wireless sensor includes an antenna, a sensing integrated circuit (ic), and a power supply impedance altering element. The antenna is operable to receive an inbound radio frequency (rf) signal and to transmit an outbound rf signal. ... Rfmicron Inc

04/20/17 / #20170110796

Method and apparatus for sensing environmental parameters using wireless sensor(s)

A passive radio frequency identification (rfid) sensor is provided. This passive rfid sensor includes an inductive loop, a processing module, and a wireless communication module. ... Rfmicron Inc

03/23/17 / #20170083805

Method and apparatus for detecting rf field strength

A method and apparatus for detecting rf field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received rf signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. ... Rfmicron Inc

03/16/17 / #20170077761

Power harvesting circuit and applications thereof

A power harvesting circuit a p-channel circuit, an n-channel circuit, an ac capacitance circuit, and an output capacitance circuit. The p-channel circuit includes a first diode element, a first diode voltage reduction circuit coupled to reduce a diode voltage of the first diode element, and a first start-up current circuit operably coupled to increase start-up current of the first diode element. ... Rfmicron Inc

03/02/17 / #20170057305

Pressure based wireless sensor and applications thereof

A wireless sensor includes an antenna, a tuning circuit, a pressure sensing circuit, a processing module, and a transmitter. Collectively, the pressure sensing circuit, the antenna, and the tuning circuit have one or more radio frequency (rf) characteristics and the pressure sensing circuit causes the rf characteristic(s) to vary with varying sensed pressures. ... Rfmicron Inc

01/12/17 / #20170013483

Wireless sensor including an rf signal circuit

A wireless sensor includes an antenna structure, an rf signal circuit, a sensing element, memory and a processing module. In a calibration mode, the sensing element is exposed to a known condition and causes a first change of an operating characteristic of the antenna structure while receiving the rf signal. ... Rfmicron Inc








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