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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


Method and 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... 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. The n-channel circuit includes a second... 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. The diode circuit passes a current when a received RF signal has a first polarity and to substantially blocks the current when the received RF signal has... Rfmicron Inc

Method and 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. The method continues by a first RF sensor tag... Rfmicron Inc

Method and 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... Rfmicron Inc

Method and 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... 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. In one other embodiment, two 3-diode charge pumps are coupled in back-to-back configuration,... Rfmicron Inc

Method and 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... 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... 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... Rfmicron Inc

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. The reference circuit... Rfmicron Inc

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. The sensing IC includes a power supply, a first power supply connection, and... Rfmicron Inc

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. The sensing IC is coupled to the... Rfmicron Inc

Method and 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. The inductive loop has an inductive loop impedance that may vary with an environment in which the inductive loop is placed. The processing module couples... Rfmicron Inc

Method and 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. In... 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, a first diode voltage reduction circuit coupled to reduce a diode voltage of the first diode element, and a first start-up current circuit... Rfmicron Inc

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... Rfmicron Inc

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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