A low-temperature radio-frequency tuning circuit has a capacitor and an inductor. The capacitor has a capacitance between two electrodes associated with a dielectric medium, and the capacitance is tunable. The medium is a quantum paraelectric material. The capacitance is tunable by application of a voltage to apply an electric field to the medium. The capacitance is tunable at a temperature of less than 4 K by use of the quantum paraelectric material as the dielectric medium.

An oscillator is provided. The oscillator includes two reverse amplification elements, and each of the reverse amplification elements forms a self-feedback structure by using an inductor. Output ends of the two reverse amplification elements are coupled to each other by using one or more inductors, and input ends of the two reverse amplification elements are coupled to each other by using a capacitor. A capacitance value of the capacitor may be adjusted, to change an oscillation frequency of a differential output oscillation signal output by the oscillator.

A voltage-controlled oscillator may include an inductor. The inductor may include a first coil coupled to an electronic component. The inductor may include a first coil coupled to the first circuit component, a second coil coupled to the first circuit component via a junction and being in parallel with the first coil, and a shared circuit path coupled to the second circuit component, the first coil, and the second coil, the shared circuit path overlapping the junction. The inductor may be configured to reduce phase noise generated by the electronic component.

Voltage-controlled oscillation circuitry includes multiple cores and multiple mode or gain boosters coupled between the multiple cores. To prevent an undesired operating mode of the voltage-controlled oscillation circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), the mode boosters may increase a desired gain of the desired operating mode and decrease an undesired gain of the undesired operating modes. In particular, mode boosters coupled to terminals of the cores that are associated with the desired operating mode may be enabled, while mode boosters coupled to terminals of the cores that are associated with the undesired operating mode may be disabled.

Voltage-controlled oscillation circuitry includes multiple cores and multiple mode or gain boosters coupled between the multiple cores. To prevent an undesired operating mode of the voltage-controlled oscillation circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), the mode boosters may increase a desired gain of the desired operating mode and decrease an undesired gain of the undesired operating modes. In particular, mode boosters coupled to terminals of the cores that are associated with the desired operating mode may be enabled, while mode boosters coupled to terminals of the cores that are associated with the undesired operating mode may be disabled.

To prevent an undesired operating mode of voltage-controlled oscillation (VCO) circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), a supply reset and ramp pulse may be provided to the VCO circuitry when switching to a new mode, such that supply voltage to the VCO circuitry is reset (e.g., set to 0 V or another reference voltage), and gradually increased or ramped up back to a steady-state voltage (e.g., used to maintain a mode) within a time duration. Additionally or alternatively, a switch control bootstrap pulse may be provided to the VCO circuitry that is bootstrapped to (e.g., applied instantaneously or concurrently with) switching the VCO circuitry to the new mode. After a time duration, the VCO circuitry may switch back to a steady-state voltage (e.g., used to maintain the new mode).

To prevent an undesired operating mode of voltage-controlled oscillation (VCO) circuitry from dominating a desired operating mode (e.g., an in-phase operating mode or an out-of-phase operating mode), a supply reset and ramp pulse may be provided to the VCO circuitry when switching to a new mode, such that supply voltage to the VCO circuitry is reset (e.g., set to 0 V or another reference voltage), and gradually increased or ramped up back to a steady-state voltage (e.g., used to maintain a mode) within a time duration. Additionally or alternatively, a switch control bootstrap pulse may be provided to the VCO circuitry that is bootstrapped to (e.g., applied instantaneously or concurrently with) switching the VCO circuitry to the new mode. After a time duration, the VCO circuitry may switch back to a steady-state voltage (e.g., used to maintain the new mode).

A DC-DC converter includes: an transformer having a primary winding and a secondary winding magnetically coupled to the primary winding; a power oscillator applying an oscillating signal to the primary to transmit a power signal to the secondary winding; a rectifier connected to the secondary winding of the transformer to obtain an output DC voltage by rectification of the power signal; comparison circuitry to generate an error signal representing a difference between the output DC voltage and a reference voltage; a transmitter connected to the secondary winding of the transformer to apply an amplitude modulation to the power signal at the secondary winding of the transformer in response to the error signal to thereby produce an amplitude modulated signal at the primary winding; and a receiver and control circuit connected to the primary winding to control an amplitude of the oscillating signal as a function of the amplitude modulated signal.

An LC oscillator is provided. The LC oscillator includes a single layer inductor disposed within a single layer inlay, wherein the single layer inductor is configured in a spiral pattern within the layer of the inlay, wherein an integrated circuit is mounted on the single layer inlay; and a capacitor included in the integrated circuit, wherein the capacitor is connected to the single layer inductor.

An LC oscillator is provided. The LC oscillator includes a single layer inductor disposed within a single layer inlay, wherein the single layer inductor is configured in a spiral pattern within the layer of the inlay, wherein an integrated circuit is mounted on the single layer inlay; and a capacitor included in the integrated circuit, wherein the capacitor is connected to the single layer inductor.