Apparatuses and methods for rapid heating a load having magnetic material(s). In some embodiments, the apparatus includes a source of radio frequency (RF) signals and a power management assembly that receives the RF signals and that increases or decreases power of the RF signals. The apparatus additionally includes directional coupler(s) that measure power of the RF signals received from the power management assembly and power of the RF signals reflected from the load to the at least one directional coupler. The apparatus further includes a control assembly operable to receive the measured powers, determine a temperature of the load based on the measured powers, and send one or more control signals to the power management assembly instructing the power management assembly to increase or decrease power of the RF signals received from the source of RF signals to maintain the determined temperature of the load at a predetermined temperature.

A power detector circuit that rejects the common mode portion of a differential signal is disclosed. The circuit includes a differential input having first and second input nodes. Differential and common mode circuit paths are coupled to the differential input. The common mode circuit path includes first and second capacitors coupled to respective first terminals of first and second input nodes of the differential input. The second terminal of each of the first and second capacitors is coupled to a gate terminal of a first bias transistor. The common mode circuit path is configured to reject a common mode portion of a differential input signal provided to the differential input such that a differential output signal is indicative of an amount of power of a differential portion of the differential input signal.

A power detector circuit that rejects the common mode portion of a differential signal is disclosed. The circuit includes a differential input having first and second input nodes. Differential and common mode circuit paths are coupled to the differential input. The common mode circuit path includes first and second capacitors coupled to respective first terminals of first and second input nodes of the differential input. The second terminal of each of the first and second capacitors is coupled to a gate terminal of a first bias transistor. The common mode circuit path is configured to reject a common mode portion of a differential input signal provided to the differential input such that a differential output signal is indicative of an amount of power of a differential portion of the differential input signal.

A radio frequency (RF) power detector is disclosed. The RF power detector includes an envelope detector having an RF signal terminal and a current mode terminal, wherein the envelope detector is configured to detect peak voltages of an RF signal at the RF signal terminal. Further included is a detector current mirror having a first mirror branch coupled to the current mode terminal and a second mirror branch configured to create a detector current that is proportional to a branch current through the first mirror branch in response to peak voltages detected by the envelope detector.

A transmission line monitoring system and central processing facility are used to determine the geometry, such as a height, of one or more conductors of a power transmission line and real-time monitoring of other properties of the conductors.

An aspect relates to an apparatus including a radio frequency (RF) signal power detector. The RF signal power detector includes a first current source configured to generate a first current based on a power level of a first RF signal; a transimpedance amplifier (TIA) configured to generate a first voltage based on the first current, wherein the TIA is coupled between a first upper voltage rail and a lower voltage rail; and a second current source configured to generate a second current related to the first current, wherein the first and second current sources are coupled in series between a second upper voltage rail and the lower voltage rail.

Aspects of the disclosure relate to devices, wireless communication apparatuses, methods, and circuitry for a RF power sensor. One aspect is an apparatus including a power sensor transistor configured to receive a radio frequency (RF) input signal and to generate an output indicative of a power of the RF input signal. The apparatus further includes a current source configured to generate a bias current. Also, the apparatus includes a current mirror, which is formed by the power sensor transistor and a second transistor, configured to provide the bias current to the power sensor transistor. The apparatus further includes a feedback circuit, which is coupled to the power sensor transistor and the second transistor, configured to control a drain current of the second transistor with respect to the bias current.

A radio frequency (RF) power detector with a variable threshold for dynamic power detection. The RF power detector includes stacked transistors of an input stage and stacked transistors of an output stage. A DC bias voltage plus an input RF signal are applied to a control electrode on the input stage and the same DC bias voltage plus an additional DC bias voltage are applied to a control electrode on the output stage. Depending on the input power of the RF signal, a Δ current is generated in the output stage, and the output capacitor is either charged or discharged, and the output capacitor voltage is compared to a threshold to generate an output signal. The output signal may be averaged over time by two capacitors, miller capacitor and output capacitor. The output voltage of the RF power detector is an integration over time of the input RF power.

A radio frequency (RF) power detector with a variable threshold for dynamic power detection. The RF power detector includes stacked transistors of an input stage and stacked transistors of an output stage. A DC bias voltage plus an input RF signal are applied to a control electrode on the input stage and the same DC bias voltage plus an additional DC bias voltage are applied to a control electrode on the output stage. Depending on the input power of the RF signal, a Δ current is generated in the output stage, and the output capacitor is either charged or discharged, and the output capacitor voltage is compared to a threshold to generate an output signal. The output signal may be averaged over time by two capacitors, miller capacitor and output capacitor. The output voltage of the RF power detector is an integration over time of the input RF power.

An electronic device and method are provided. The electronic device includes a directional coupler, a sense pair connected to the directional coupler, and an analog-to-digital converter (ADC) connected to the sense pair. The ADC directly digitizes a signal current received from the sense pair.