Abstract: Systems and methods related to charge locking circuits and a control system for qubits are provided. A system for controlling qubit gates includes a first packaged device comprising a quantum device including a plurality of qubit gates, where the quantum device is configured to operate at a cryogenic temperature. The system further includes a second packaged device comprising a control circuit configured to operate at the cryogenic temperature, where the first packaged device is coupled to the second packaged device, and where the control circuit comprises a plurality of charge locking circuits, where each of the plurality of charge locking circuits is coupled to at least one qubit gate of the plurality of qubit gates via an interconnect such that each of the plurality of charge locking circuits is configured to provide a voltage signal to at least one qubit gate.

Abstract: A transformer based voltage controlled oscillator (VCO) is provided with a primary resonant circuit having a first inductor connected in parallel with a variable first capacitance circuit. A secondary resonant circuit is formed from a second inductor connected in parallel with a variable second capacitance circuit, and also includes a mode control circuit. The mode control circuit controls the direction of current flow through the secondary resonant circuit inductor. The first and second inductors are inductively mutually coupled in either an even mode or an odd mode in response to the mode control circuit. The VCO supplies a first resonant frequency in response to even mode operation, or a second resonant frequency, greater than the first resonant frequency, responsive to odd mode operation. The VCO may include a first electrically tunable varactor shunted across the first capacitance circuit and a second electrically tunable varactor shunted across the second capacitance circuit.

Abstract: An oscillator circuit includes an oscillating circuit coupled to a vibrator, and a control circuit that controls the oscillating circuit. The oscillator circuit has a normal operation mode in which the oscillating circuit oscillates in a state where a negative resistance value is a first value, and a start mode in which the oscillator circuit shifts from a state where oscillation is stopped to the normal operation mode. In the start mode, the control circuit controls the negative resistance value to increase from a second value which is smaller than the first value.

Abstract: An oscillator oscillating a tera hertz wave includes a negative resistive element including a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer, with a first conductor, a second conductor, and a dielectric disposed between the first conductor and the second conductor constitutes a resonator, wherein the negative resistive element is disposed between the first conductor and the second conductor, and a layer with a higher resistivity than the first semiconductor layer or the second semiconductor layer, or an amorphous layer is disposed between the negative resistive element and the dielectric.

Abstract: An electronically aligned wideband tracking modulator system is described. The wide band tracking modulator system comprises a waveguide coupled to an antenna. The wide band tracking modulator system also comprises waveguide tuning circuitry configured to convert RF energy from a waveguide of the wideband tracking modulator system into an RF signal that can be processed by the waveguide tuning circuitry. The waveguide tuning circuitry is also configured to shift a phase of the RF signal. The waveguide tuning circuitry is further configured to convert the phase-shifted RF signal into phase-shifted RF energy and return the phase-shifted RF energy to the waveguide to electrically align the wideband tracking modulator system.

Abstract: An apparatus is disclosed for providing frequency stabilization. The apparatus includes a first supply voltage node, a second supply voltage node, an oscillator circuit coupled to the first supply voltage node, at least one clock buffer coupled to the second supply voltage node and an output of the oscillator circuit, and at least one load circuit. The at least one clock buffer is configured to selectively be in a disabled state or an enabled state to pass the clock signal to at least one client of multiple clients. The at least one load circuit includes an input coupled to the output of the oscillator circuit. The at least one load circuit also includes an output configured to be coupled to a ground. The at least one load circuit is configured to be connected to the first supply voltage node for at least a portion of time.

Abstract: A power source supply circuit supplies an output power source of a battery to a vehicle control apparatus that includes a first instrument control portion that selectively receives a voltage applied to a first power source input portion or a voltage applied to a second power source input portion as an operation voltage and a second instrument control portion that receives a voltage applied to a second power source input portion or a third power source input portion as the operation voltage.

Abstract: A semiconductor device according to the present embodiment includes a plurality of switching elements and a plurality of variable capacitance elements. The switching elements are switching elements connected in series between a first control terminal and a second control terminal and plural types of capacitance control signals can be supplied to the first control terminal and the second control terminal. The variable capacitance elements have capacitance control terminals connected to corresponding one ends of the switching elements, respectively.

Abstract: A clock source includes a comparator having a positive comparator input, a negative comparator input, a proportional to absolute temperature (PTAT) PMOS bias input, a PTAT NMOS bias input, and a comparator output, a resonator element, series and feedback resistors and other passive components coupled between the comparator output and the negative comparator input to generate a signal with approximately constant gain and frequency at the comparator output, and a PTAT bias circuit coupled to the comparator's PTAT PMOS and NMOS bias inputs, and configured to drive the PTAT PMOS bias input and the PTAT NMOS bias input to maintain approximately constant gain and frequency over the operating temperature range of the clock source.

Abstract: An embodiment pulse-width modulation (PWM) modulator circuit comprises a first half-bridge stage having a first output node and a second half-bridge stage having a second output node. The first output node and the second output node are configured to have an electrical load coupled therebetween to apply thereto a PWM-modulated output signal. The circuit comprises a differential stage having input nodes configured to receive an input signal applied between the input nodes and produce a differential control signal for the first half-bridge stage and the second half-bridge stage. A current comparator is arranged intermediate the differential stage and the first and second half-bridge stages. The current comparator is configured to produce a PWM-modulated drive signal to drive the half-bridge stages as a function of the input signal applied between the input nodes in the differential stage.

Abstract: Provided is an oscillator circuit including an LC oscillator circuit, an amplitude detection circuit, and a bias generation circuit, in which the LC oscillator circuit includes an inductor and at least one variable capacitance element, the amplitude detection circuit detects an oscillation amplitude of the LC oscillator circuit and converts the oscillation amplitude into a DC voltage, and the bias generation circuit compares the DC voltage with a voltage for generating a bias signal, the voltage changing on the basis of a temperature fluctuation of the bias generation circuit, calculates a difference between the DC voltage and a voltage after the change, and generates, on the basis of the difference, a bias signal that reduces a fluctuation in the oscillation amplitude, to control the oscillation amplitude.

Abstract: Provided is a rechargeable battery jump starting device with a discharged battery pre-conditioning system to facilitate boosting or charging a depleted or discharged battery, for example, to jump start a vehicle or equipment engine. The pre-conditioning increases the operating voltage to the depleted or discharged battery during the pre-conditioning phase.

Abstract: Both parallel-type and serial-type dual-mode oscillators employing stress compensated cut resonators having various configurations are disclosed. Both classes of dual-mode oscillators employ multiple tank circuits to pass one frequency of the resonator and block the other frequency. The tank circuits isolate the operation of the two oscillator sub-circuits that form the dual-mode oscillator from one another. The dual-mode oscillators may be implemented with either bipolar or CMOS transistors. The parallel-type dual-mode oscillators employ inverters to provide gain. The serial-type dual-mode oscillators employ a two (or three) stage design including a follower circuit first stage and an inverting amplifier/limiter circuit second stage, with an optional intervening transimpedance amplifier stage.

Abstract: A reference frequency signal generator comprises a plurality of ovenized reference crystal oscillators (OCXOs) having different turn-over-temperatures, a selector logic circuit coupled to outputs of the OCXOs, a temperature sensor, and a controller coupled to an output of the temperature sensor. The selector logic circuit outputs one of the outputs of the OCXOs based on a control signal from the controller. The controller also generates control signals for the OCXOs. In some implementations, the reference frequency signal generator includes a phase-locked loop or a fractional output divider coupled to the output of the selector logic circuit and configured to receive a calibration signal from the controller.

Abstract: An oscillator includes dual resonators mounted in a helium filled coldweld holder. One resonator operates at anti-resonance into a load capacitance of about 20 picofarads, and operates on a third overtone frequency under noncontrolled temperature conditions. The other resonator operates on a fundamental mode at anti-resonance in a load capacitance of about 32 picofarads. Resonator crystals in a dual-crystal resonator may include a theta-angle shift to equalize frequency versus temperature curves at temperature extremes.

Abstract: An interface circuit for a position sensor system including an oscillator generating an oscillation signal having a carrier frequency and a primary phase, a primary coil responsive to the oscillation signal, and a secondary coil electromagnetically coupled to the primary coil by a target and configured to generate a secondary signal having the carrier frequency and a secondary phase provides phase compensation.

Abstract: In an example, a system includes an oscillator circuit on a chip. The oscillator circuit includes a charging current generator including a current mirror and an amplifier, where the amplifier is coupled to a pin of the chip. The oscillator circuit also includes a first switch coupled to the pin, a second switch coupled to the pin and to a charging resistor, and a third switch coupled to the amplifier and an internal resistor, where the internal resistor is internal to the chip. The oscillator circuit includes a bias current source coupled to the current mirror. The system includes an external resistor coupled to the pin, where the external resistor is external to the chip. The system also includes an external capacitor coupled to the pin and coupled in parallel to the external resistor, where the external capacitor is external to the chip.

Abstract: A ?? frequency to digital converter includes digital feedback to an accumulator in a ring phase calculator that provides the converter output, which reduces implantation complexity. Digital gain correction is applicable to dual mode ring oscillator converters and charge pump converters, provides compensation for forward path gain error and eliminates the need to include analog gain correction in feedback. Asynchronous sampling includes correction logic to compensate for arbitrary initial conditions. A digitally-controlled oscillator (DCO) control technique causes the DCO frequency to increase or decrease by changing the state of one its frequency control elements at a time.

Abstract: In an electromagnetic wave generation device including a plurality of electromagnetic wave generation elements, an instantaneous maximum power consumption during an electromagnetic wave generation operation is reduced. Specifically, the electromagnetic wave generation device includes a plurality of electromagnetic wave generation elements that are divided into a plurality of groups, and a control unit that causes the plurality of electromagnetic wave generation elements to oscillate while shifting a timing in units of group. For example, the control unit causes the plurality of electromagnetic wave generation elements to oscillate such that when the number of the plurality of groups is n, an oscillation start timing of the group that performs mth oscillation (m is a natural number equal to or larger than 2 and equal to or smaller than n) is the same timing as or after an oscillation end timing of the group that performs (m?1)th oscillation.

Abstract: A capacitor circuit includes a capacitor array including first to n-th capacitors connected to each other in parallel; a select switch circuit including first to n-th select switches connected to the first to n-th capacitors in series, respectively; and a short switch circuit including first to n-th short switches connected to the first to n-th capacitors in parallel, respectively, and operating complementarily to the first to n-th select switches, respectively, wherein n is an integer of 2 or greater.