Abstract: A power supply apparatus including a power conversion circuit, a single transformer, a conjugate energy-storing inductor and a first and a second rectifying and filtering circuit is provided. The single transformer has a primary winding, a first secondary winding and a second secondary winding. The primary winding is coupled to the power conversion circuit and the first and second secondary windings respectively induce a corresponding voltage based on a voltage of the primary winding. The conjugate energy-storing inductor has a first and a second conjugate coil isolated from each other. The first and second rectifying and filtering circuits respectively charges/discharges in response to the voltage induced by the first and second rectifying and filtering circuits, and thereby respectively provides a first and a second output voltage via the output terminals of the first and second rectifying and filtering circuits.

Abstract: A capacitor module includes a capacitor element, a first voltage terminal connected to a first pole of the capacitor element, and a second voltage terminal connected to a second pole of the capacitor element. The capacitor module further includes a cooling duct system for cooling the capacitor element, and a housing encapsulating the capacitor element and the cooling duct system. The housing comprises wiring lead-throughs for the first and second voltage terminals and piping lead-throughs for the cooling duct system. As the capacitive module is encapsulated and includes the cooling ducts and the wiring and piping lead-throughs, modular capacitive energy-storages of different sizes can be built by interconnecting capacitor modules of the kind described above, and there is no need to build separately an encapsulation provided with cooling ducts.

Abstract: An electronic circuit is described including an oscillator generating an oscillating signal having a cycle responsive to an input signal, a voltage detector producing a detection signal responsive to a power supply voltage, a frequency divider generating a frequency-divided signal obtained by dividing a frequency of the oscillating signal by a frequency-division ratio responsive to the detection signal, and an adder obtaining a sum of a first signal and a second signal and to supply a signal responsive to the sum to the oscillator as the input signal. The first signal is responsive to a difference in phase between the frequency-divided signal and a reference signal, and the second signal is responsive to the detection signal. A related method is also described.

Abstract: This invention comprises a nonlinear micro- and nano-mechanical resonator that can maintain frequency of operation and amplitude of operation for a period of time after all external power has been removed from the device. Utilizing specific nonlinear dynamics of the micromechanical resonator, mechanical energy at low frequencies can be input and stored in higher frequencies modes, thus using the multiple degrees of freedom of the resonator to extend its energy storage capacity. Furthermore, the energy stored in multiple vibrational modes can be used to maintain the resonator oscillating for a fixed period of time, even without an external power supply. This is the first demonstration of an “autonomous” frequency source that can maintain a constant frequency and vibrating amplitude when no external power is provided, making it ideal for applications requiring an oscillator in low power, or limited and intermittent power supplies.

Abstract: An electronic apparatus includes a voltage-controlled oscillator and a biasing circuit. The voltage-controlled oscillator includes varactors. The voltage-controlled oscillator is configured to output an oscillating frequency at a first temperature. The biasing circuit electrically coupled with the varactors is configured to provide a first biasing voltage to the varactors at the first temperature, and provide a second biasing voltage to the varactors at a second temperature, in which the varactors have a first temperature coefficient, and the biasing circuit generates the first biasing voltage and the second biasing voltage according to values of the first temperature coefficient and a second temperature coefficient.

Abstract: Aspects of various embodiments of the present disclosure are directed to applications utilizing oscillator circuits. In certain embodiments, an apparatus includes an oscillator circuit having one or more capacitors. The oscillator circuit is configured to generate an oscillating signal by repeated charging and discharging of the capacitors. The apparatus also includes a control circuit connected to the oscillator. The control circuit is configured to set the oscillation frequency of the oscillator circuit as a non-linear function of an input control signal. For instance, in a more specific embodiment, the control circuit may be configured to set oscillation frequency of the oscillator circuit to a frequency scaled by a value raised to an exponent specified by the input control signal.

Abstract: In an embodiment, a voltage-controlled oscillator circuit includes a gain element and an LC resonator coupled with the gain element, the LC resonator including an inductor section and a capacitor section. The capacitor section has at least two branches connected in parallel and a voltage control input for tuning the LC resonator. Any of the at least two branches is selected from the group of DC-coupled and AC-coupled. Characteristics of the two branches and bias voltages of the AC-coupled branches are selected to provide a tuning curve of the voltage-controlled oscillator circuit that is approximately linear.

Abstract: In some aspects, a wireless sensor device includes a voltage controlled oscillator. The voltage controlled oscillator includes a resonator circuit, a multiplexer and control logic. The resonator circuit includes a switched capacitor bank operable to tune the resonator circuit. The multiplexer is communicatively coupled to the switched capacitor bank to select combinations of capacitor bank elements based on input values representing digital capacitance levels. The multiplexer includes a first multi-bit input configured to receive a first set of values representing a first combination of the capacitor bank elements; a second multi-bit input configured to receive a second set of values representing a second combination of the capacitor bank elements; and a multi-bit output configured to communicate the first or second set of values to the switched capacitor bank. The control logic is configured to generate the first and second sets of values for each of the digital capacitance levels.

Abstract: A digital control oscillator circuit includes: a ring oscillator having delay elements delaying a pulse signal; a counter circuit counting the circulation number of the pulse signal; a rough period generation unit acquiring a period setting value as a magnification ratio for a reference clock, and counting the reference clock using an integer part of the ratio to generate a rough period timing; a fraction conversion unit converting a decimal point part of the ratio into the number of the elements passed by the pulse signal to generate a fraction; and an output processing unit selecting a timing when outputs of the ring oscillator and the counter circuit become values corresponding to the fraction as an output timing when a time corresponding to the fraction has passed after the rough period timing, and generating an output signal oscillating at a period represented by the period setting value according to the output timing.

Abstract: An oscillator has an oscillator output emitting an oscillating signal. The oscillator includes oscillator cores which each have a same circuit topology. A set of configuration switches couple a selected number of oscillator cores in parallel to generate the oscillating signal. The oscillator cores are arranged with a symmetry around a central axis. The planar inductors of the oscillator cores are arranged in a petal-like pattern with the planar inductors forming the petals of the petal-like pattern. The selected coupling of the oscillator cores in made in response to a selected phase noise threshold of a modulation device which receives the oscillating signal.

Abstract: A wide tuning range oscillator system uses multiple active cores with cross-coupled transistors and multiple tapped inductors having windings that can be connected to circuit nodes. These active cores are connected to a pair of symmetric tapping points and are switched ON/OFF by biasing elements. Biasing schemes and the topology of the individual cross-coupled cores may be different from each other. The tapping points are symmetrically arranged around the center point of the inductor. One or more of the active cores may be enabled for tuning the center frequency of the oscillator system.

Abstract: A current-to-voltage converter receives a current which varies with temperature according to a selected one of two or more temperature coefficient factors and converts it to a temperature-dependent voltage to be used as a control signal to a varactor in a voltage controlled oscillator, VCO, to compensate for temperature-induced frequency drift in the VCO. A feedback arrangement with hysteresis is provided for controlling the selection of the temperature coefficient factor and operates by comparing the temperature-dependent voltage with a reference voltage. The reference voltage may be pre-set and equivalent to a known operating temperature. A switching signal is generated when Vout approaches the reference voltage and in response, a control module generates a selection signal for selecting a different temperature coefficient factor.

Abstract: An electronic device comprises a controllable capacitor bank and a capacitive divider arranged in parallel with the capacitor bank and configured to linearize the capacitor bank in a linearization frequency range of a frequency characteristic of the electronic device. The capacitive divider comprises a series arrangement of a first series capacitance, and a main capacitor bank. A control circuit coupled to one or more control inputs of the capacitive divider and controllable capacitor bank is configured to modify the equivalent capacitance of the capacitive divider and the controllable capacitor bank for providing capacitance steps, each capacitance step being variable over frequency such that for each step a frequency change ?f of the frequency characteristic is maintained constant in the linearization frequency range.

Abstract: Synchronization of oscillators based on anharmonic nanoelectromechanical resonators. Experimental implimentation allows for unprecedented observation and control of parameters governing the dynamics of synchronization. Close quantitative agreement is found between experimental data and theory describing reactively coupled Duffing resonators with fully saturated feedback gain. In the synchonized state, a significant reduction in the phase noise of the oscillators is demonstrated, which is key for applications such as sensors and clocks. Oscillator networks constructed from nanomechanical resonators form an important laboratory to commercialize and study synchronization—given their high-quality factors, small footprint, and ease of co-integration with modern electronic signal processing technologies. Networks can be made including one-, two-, and three-dimensional networks. Triangular and square lattices can be made.

Abstract: A circuit includes a voltage controlled oscillator (“VCO”) having a VCO cell. The VCO cell includes a first transistor and a second transistor. The first transistor has a gate terminal coupled to a first node that also is coupled to a low-pass filter from which the gate terminal receives a first control voltage signal. A second terminal of the first transistor is connected to a first voltage source. The second transistor has a gate terminal coupled to a second node that is disposed between a capacitor and a resistor of the low pass filter. The second transistor has a second terminal connected to the first voltage source. The second transistor is larger than the first transistor, and the VCO has an output terminal for providing an output frequency signal.

Abstract: An aircraft power distribution system includes a first DC power distribution bus, a second DC power distribution bus, and a DC power source coupled with at least one of the first or second DC power distribution buses, wherein the DC power distribution buses are electrically coupled by a plurality of electrical couplings.

Abstract: A control installation includes a DC power supply (4) able to power a plurality of electrical units (3), and a system (5) for managing the power supply to the electrical units (3). The installation also includes a transmitter control device (1) including radiofrequency transmission elements (10) and actuators (11) each including a transducer making it possible to control the transmission of a radiofrequency signal, and a receiver control device (2) making it possible to send to the management system (5), control signals, dependent on the radiofrequency signal or signals received, so as to activate or deactivate the power supply to at least one part of the electrical units (3). The invention also relates to a structure and a corresponding method of mounting.

Abstract: A vibrator includes a vibrator element and a base on which the vibrator element is installed. In addition, when n is set to a natural number equal to or greater than 2, and j is set to a natural number equal to or greater than 1 and equal to or less than n, the vibrator element includes n inherent vibration modes having resonance frequencies different from each other, and when a resonance frequency of a main vibration of the vibrator element in the n inherent vibration modes is set to ?1 in a relationship between an arbitrary integer kj and a resonance frequency ?j corresponding to each of the n inherent vibration modes, the following three expressions are all satisfied. ?? ? ( ? j = 2 n ? k j ? ? j - k 1 - ? 1 ) / ? 1 ? ? 1 ? ? 0.

Abstract: A digitally compensated phase locked oscillator (DCPLO) is disclosed herein. The DCPLO comprises: a DCPLO input for receiving a reference signal at a known frequency; a DCPLO output for outputting a signal at a desired frequency; a phased locked loop (PLL), the phased locked loop comprising: a phase frequency detector, an oscillator, and a PLL output coupled to the output; a first direct digital synthesizer (DDS), the first DDS having an output coupled to the PLL to supply a DDS signal to the PLL for adjusting the frequency within the PLL so as to maintain phase lock over the operating temperature; a temperature sensor; and a processor coupled to the first DDS, the phase frequency detector, and the temperature sensor, the processor configured to set the frequency of the first DDS according to a temperature sensed by the temperature sensor.

Abstract: An oscillator circuit that includes a Wien bridge oscillator circuit, a full-wave rectifier circuit, coupled to an output of the Wien bridge oscillator circuit, an integrator circuit, coupled to an output of the full-wave rectifier circuit, and a multiplier circuit. The multiplier circuit may include a first input coupled to the output of the Wien bridge oscillator circuit, and a second input, coupled to an output of the integrator, wherein the multiple signals are configured to provide dynamic gain control to the Wien bridge oscillator circuit.