Class / Patent application number | Description | Number of patent applications / Date published |
331045000 | POLYPHASE OUTPUT | 20 |
20090058538 | Radiation Hard Oscillator and Differential Circuit Design - A radiation hard design for oscillator circuits and circuits having differential outputs is described. The design includes connecting or otherwise coupling outputs of these circuits to a passive polyphase filter. The passive polyphase filter provides four quadrature outputs that are free of glitches that may have occurred at the filter input. | 03-05-2009 |
20090066427 | Poly-phase frequency synthesis oscillator - A frequency synthesis/multiplication circuit and method for multiplying the frequency of a reference signal. In one embodiment, multiple versions of the reference signal are generated having different phases relative to one another, and these multiple versions are combined to form an output signal having a frequency that is a multiple of the frequency of the reference signal. | 03-12-2009 |
20090121796 | POLYPHASE NUMERICALLY CONTROLLED OSCILLATOR - A polyphase numerically controlled oscillator is disclosed. An input signal is received at a phase accumulator. The phase accumulator provides a phase to a phase interpolator. The phase interpolator then provides a plurality of output phases. The plurality of output phases are provided to a plurality of phase to amplitude converters. Each of said plurality of phase to amplitude converters process one of said plurality of output phases. | 05-14-2009 |
20090174486 | Low power frequency division and local oscillator generation - A plurality of inverters are arranged serially to form a ring oscillator and coupled to receive a reference clock signal. The reference clock signal is used to switch the inverters on and off so that not all of the inverters are on at a same time. The ring oscillator circuit is used as a divider circuit to divide the frequency of the reference clock signal to produce a local oscillator signal at a second frequency. | 07-09-2009 |
20090224840 | Photonic diode - An element for interacting with electromagnetic radiation is disclosed, including a first self-resonant body, a second self-resonant body, and a directional device interposed between the first self-resonant body and the second self-resonant body. The directional device is adapted to inhibit propagation of electromagnetic radiation from the second self-resonant body to the first self-resonant body. | 09-10-2009 |
20090231047 | MULTI-PHASE VOLTAGE-CONTROL OSCILLATOR - A multi-phase voltage-control oscillator including a first voltage-control oscillator circuit and a second voltage-control oscillator circuit is provided. The second voltage-control oscillator circuit and the first voltage-control oscillator circuit have a plurality of inductors, and the inductors in the second voltage-control oscillator circuit are respectively cross-coupled with the inductors in the first voltage-control oscillator circuit to generate a mutual inductance effect, so as to output a plurality of oscillating signals with different phases. | 09-17-2009 |
20090256640 | AGILE HIGH RESOLUTION ARBITRARY WAVEFORM GENERATOR WITH JITTERLESS FREQUENCY STEPPING - Jitterless transition of the programmable clock waveform is generated employing a set of two coupled direct digital synthesis (DDS) circuits. The first phase accumulator in the first DDS circuit runs at least one cycle of a common reference clock for the DDS circuits ahead of the second phase accumulator in the second DDS circuit. As a phase transition through the beginning of a phase cycle is detected from the first phase accumulator, a first phase offset word and a second phase offset word for the first and second phase accumulators are calculated and loaded into the first and second DDS circuits. The programmable clock waveform is employed as a clock input for the RAM address controller. A well defined jitterless transition in frequency of the arbitrary waveform is provided which coincides with the beginning of the phase cycle of the DDS output signal from the second DDS circuit. | 10-15-2009 |
20100085122 | DEVICE WITH TWO DIFFERENTIAL OSCILLATORS WITH PULSED POWER SUPPLY COUPLED TO AND IN QUADRATURE-PHASE WITH EACH OTHER - The present invention concerns a device having a first and a second differential oscillators ( | 04-08-2010 |
20100117744 | PHASE ERROR CORRECTION IN ROTARY TRAVELING WAVE OSCILLATORS - An RTWO apparatus includes an N-phase RTWO (N is an integer greater than or equal to two) and a phase correction circuit. The N-phase RTWO includes a closed-loop transmission line formed as a Moebius strip. The closed-loop transmission line includes N transmission line segments, to which N voltage controlled capacitors are coupled. The N transmission line segments provide N output phases. The phase correction circuit operates to detect phase errors between output phases, and, depending on the detected phase errors, generates N control voltages for controlling the capacitances of the N voltage controlled capacitors. Controlling the capacitances of the N voltage controlled capacitors in this coordinated manner reduces the phase errors among the N output phases, thereby providing a phase accurate multi-phase RTWO output. | 05-13-2010 |
20100321121 | FLEXIBLE LOW CURRENT OSCILLATOR FOR MULTIPHASE OPERATIONS - An oscillator includes a reference stage and multiple phase stages. The reference stage has a reference transistor having a gate coupled to a voltage reference and a drain coupled to a reference current source. Each phase stage includes a transistor, two current sources, a capacitor, switch, inverter, and latch. The transistor has a drain coupled to a first current source, a gate coupled to a node and a source coupled to the reference transistor's source. The capacitor and switch couple between the node and ground. The second current source couples to the node. The transistor's drain couples to the inverter's input. The inverter's output couples to the latch's set input. The latch's output couples to the switch. The inverter output also couples to the reset input of a subsequent phase stage's latch. The inverter output for a last stage couples to the reset input of a first stage latch. | 12-23-2010 |
20120126903 | Stabilized Digital Quadrature Oscillator - A stabilized quadrature oscillator providing consistently high signal quality is disclosed. The stabilized quadrature oscillator includes an iterative quadrature oscillator and a quadrature signal stabilizer. The iterative quadrature oscillator generates an iterative cosine signal and an iterative sine signal using a stabilized cosine signal and a stabilized sine signal from the quadrature signal stabilizer. The quadrature signal stabilizer generates the stabilized cosine signal and the stabilized sine signal based on an energy measure of the iterative cosine signal and the iterative sine signal. Specifically, if the energy measure is less than a low threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a greater magnitude than the iterative sine signal and the iterative cosine signal, respectively. Conversely, if the energy measure is greater than a high threshold then the quadrature signal stabilizer generates the stabilized sine signal and the stabilized cosine signal to have a lesser magnitude than the iterative sine signal and the iterative cosine signal, respectively. | 05-24-2012 |
20120133445 | Electronic Pulse Generator And Oscillator - Improvements in and relating to electronic pulse generation or oscillation circuitry based on a signal path exhibiting endless electromagnetic continuity and affording signal phase inversion in setting pulse duration or half-cycles of oscillation within time of signal traverse of said signal path, and having active switching means associated with said signal path to set rise and fall times of each said pulse or said half-cycle of oscillation, including for frequency adjustment by selective inductance and power saving without stopping pulse generation or oscillation. | 05-31-2012 |
20120249250 | Quadrature Voltage Controlled Oscillator - According to embodiments of the present invention, a quadrature voltage controlled oscillator is provided. The quadrature voltage controlled oscillator includes a first voltage controlled oscillator and a second voltage controlled oscillator respectively comprising an inductor having a first terminal and a second terminal, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor respectively comprising a first terminal and a second terminal, a first transistor, a second transistor, a third transistor and a fourth transistor respectively comprising a source terminal, a drain terminal and a gate terminal, wherein the first terminal of the inductor is coupled to the first terminal of the first capacitor, and the second terminal of the inductor is coupled to the second terminal of the first capacitor, wherein the drain terminal of the first transistor is coupled to the first terminal of the inductor, the first terminal of the first capacitor, the first terminal of the second capacitor, and the gate terminal of the fourth transistor, wherein the drain terminal of the second transistor is coupled to the second terminal of the inductor, the second terminal of the first capacitor, the first terminal of the third capacitor, and the gate terminal of the third transistor, wherein the source terminal of the first transistor is coupled to the second terminal of the second capacitor, the drain terminal of the third transistor, and the first terminal of the fourth capacitor, wherein the source terminal of the second transistor is coupled to the second terminal of the third capacitor, the drain terminal of the fourth transistor, and the second terminal of the fourth capacitor, wherein the gate terminal of the first transistor of the first voltage controlled oscillator is directly coupled to the first terminal of the inductor of the second voltage controlled oscillator, wherein the gate terminal of the second transistor of the first voltage controlled oscillator is directly coupled to the second terminal of the inductor of the second voltage controlled oscillator, wherein the gate terminal of the first transistor of the second voltage controlled oscillator is directly coupled to the second terminal of the inductor of the first voltage controlled oscillator, wherein the gate terminal of the second transistor of the second voltage controlled oscillator is directly coupled to the first terminal of the inductor of the first voltage controlled oscillator. | 10-04-2012 |
20130088301 | Oscillator circuit and method of providing an oscillator output signal - The present invention is directed to an oscillator circuit comprising an oscillator input for providing an input signal, a first integrator circuit comprising a first integrator capacitor and a first integrator output, a comparator, a discharge circuit for discharging said first integrator capacitor once per cycle of said oscillator circuit, and an oscillator output for providing an output signal, wherein said oscillator circuit further comprises a second integrator circuit comprising a second integrator capacitor and a second integrator output, and wherein said oscillator circuit is arranged for allowing said input signal to be subsequently integrated by said first and second integrator circuit in an alternating manner, and for providing said integrated output signal of said first and second integrator circuit subsequently to said comparator in said alternating manner. | 04-11-2013 |
20130278344 | Oscillation Signal Generator, In-Phase/Quadrature Oscillation Signal Generator and Associated Signal Processing Method - An oscillation signal generator includes a quadrature voltage-controlled oscillator (QVCO), a phase corrector and a frequency adjusting circuit. The QVCO provides multiple oscillation signals having difference phases. The phase corrector selects one of the oscillation signals as a first oscillation signal and outputs the first oscillation signal from a first output terminal, and selects one of the oscillation signals as a second oscillation signal and outputs the second oscillation signal from a second output terminal. A phase difference between the first and second oscillation signals satisfies a predetermined relationship. The frequency adjusting circuit is coupled to the phase corrector, and generates a quadrature signal and an in-phase signal according to the oscillation signals. The frequency of the oscillation signals is a non-integral multiple of the frequencies of the quadrature and in-phase signals. | 10-24-2013 |
20140218120 | ELECTRONIC CIRCUITS USING COUPLED MULTI-INDUCTORS - Coupled multi-inductors and their applications. An apparatus includes several circuit stages. Each circuit stage includes an inductive element that overlaps with the inductive elements of its adjacent circuit stages, forming a loop of coupled circuit stages. The apparatus may be, for example, a multi-phase oscillator with multiple oscillators that are magnetically coupled to each other for generating oscillation signals at different phases. The apparatus may also be, for example, a phase interpolator for combining input signals. | 08-07-2014 |
20140306772 | MULTI-PHASE VOLTAGE-CONTROLLED OSCILLATOR - Embodiments provide a multi-phase voltage controlled oscillator (VCO) that produces a plurality of out-put signals having a common frequency and different phases. In one embodiment, the VCO may include a passive conductive structure having a first ring and a plurality of taps spaced around the first ring. The VCO may further include a capacitive load coupled to the passive conductive structure, one or more feedback structures coupled between a pair of opposing taps of the plurality of taps, and one or more current injection devices coupled between a pair of adjacent taps of the plurality of taps. | 10-16-2014 |
20150084703 | SPEED OF LIGHT REFERENCED OSCILLATOR - An oscillator and a method of fabricating the oscillator are described. The oscillator includes a resonator with a plurality of transmission lines. An oscillation frequency of the oscillator is independent of at least one dimension of the plurality of transmission lines. The oscillator also includes a negative resistance circuit coupled to the resonator that cancels internal loss resistance of the resonator. | 03-26-2015 |
20150123738 | POLY-PHASE LOCAL OSCILLATOR - One embodiment of the present invention features a poly-phase local oscillator generator combining frequency dividers and direct-injection-locked phase correctors. The poly-phase local oscillator generator comprises a plurality of phase correctors configured to relax frequency and tuning range of a reference local oscillator (LO), and a plurality of frequency dividers, coupled to the phase correctors, configured to offer different frequency segments. The phase correctors are expandable, so that phase accuracy can be optimized by cascading more of themselves. | 05-07-2015 |
20150349755 | FREQUENCY CONVERTER - A frequency converter, comprising a multi-phase local oscillator and a multi-phase mixer. The mixer comprises a plurality of mixer switches, each connected to a respective amplifier. The local oscillator is configured to provide a switching signal to each mixer switch, and comprises a plurality of inverters configured as a ring oscillator. | 12-03-2015 |