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| Number | Title | Issue Date |
| 8174325 | Adaptive injection-locked oscillator array for broad spectrum RF analysis The present invention provides an array of tunable, injection-locking oscillators which are scalable to higher frequencies and measure the entire relevant frequency space simultaneously. The scalable, highly-parallelized, adaptive receiver architecture uses arrays o... | 05/08/2012 |
| 8143954 | Oscillation device with auxiliary oscillating means A device can be coupled to an electrical load for supplying electrical power to the electrical load. The device contains an oscillator unit and an auxiliary oscillator unit. The oscillator unit is configured to generate an output signal of the device which can be su... | 03/27/2012 |
| 8143955 | Oscillator circuit for radio frequency transceivers Oscillator circuit for radio frequency transceivers. An oscillator circuit includes a first oscillator that generates a signal having a first frequency and a second oscillator that generates a signal having a second frequency. The oscillator circuit includes a mixer... | 03/27/2012 |
| 8130044 | Phase-locked loop circuitry with multiple voltage-controlled oscillators Configurable phase-locked loop circuitry is provided. The phase-locked loop circuitry may include a buffer having a buffer output and a multiplexer having inputs and an output. The phase-locked loop circuitry may include multiple voltage-controlled oscillators. The ... | 03/06/2012 |
| 8120429 | Voltage-controlled oscillator methods and apparatus Methods and apparatus are provided for generating a clock signal with relatively high bandwidth and relatively low phase noise. A circuit of the invention can include a pair of transistors serially coupled between a signal of relatively high voltage and a source of ... | 02/21/2012 |
| 8115556 | Resonant device with improved features The device resonant comprises a plurality of synchronized oscillators. Each oscillator comprises a resonator which comprises detection means providing detection signals representative of oscillation of the resonator to a feedback loop connected to an excitation inpu... | 02/14/2012 |
| 8067987 | Millimeter-wave wideband voltage controlled oscillator A voltage controlled oscillator-phase lock loop (VCO-PLL) system includes a voltage controlled oscillator (VCO) system implementing four-channel architecture, such that two bands support two channels; a phase-locked-loop (PLL) system; and a mixer system. The VCO sys... | 11/29/2011 |
| 8049567 | Circuit for phase locked oscillators A circuit comprising a DC current source and at least two spin torque oscillators, the at least two spin torque oscillators being electrically coupled to each other and to the DC current source. A circuit comprising phase shifting means is connected in such a way as... | 11/01/2011 |
| 8013681 | Wide spectrum radio transmit architecture A communications device (100) includes a frequency divider circuit (106) having a plurality of frequency division ratios. The device also includes at least one phase-lock loop (PLL) circuit (101, 102, 103, 104, 110, 112) coupled to at least a si... | 09/06/2011 |
| 7978012 | Dual PLL loop for phase noise filtering System for filtering an input frequency to produce an output frequency having low phase noise. A first PLL includes, in the feedback path, a frequency translation circuit which translates a frequency from a VCO in the first PLL by an offset frequency provided by the... | 07/12/2011 |
| 7902926 | Communication system and oscillation signal provision method An embodiment of a communication system is provided, in which a high frequency oscillator generates a first high frequency signal upon receipt of no disable signal. The first high frequency signal is commonly shared by at least two modules. Each module coupled to th... | 03/08/2011 |
| 7898342 | Circuit for clock interpolation and method for performing clock interpolation In a circuit and a method of clock interpolation, an input signal at a first frequency is processed and at least one output signal having a second frequency being a multiple of the first frequency of the input signal is output. The circuit is defined by the fact tha... | 03/01/2011 |
| 7863987 | Clock signal generating and distributing apparatus LC resonant voltage control oscillators are adopted as voltage control oscillators for the purpose of providing a clock generating and distributing apparatus that can generate and distribute a clock signal of high precision even in a high-frequency region of several... | 01/04/2011 |
| 7834705 | Frequency synthesizer having multi-band voltage controlled oscillator There is provided a frequency synthesizer including a multi-band voltage controlled oscillator having a plurality of voltage controlled oscillating cores outputting oscillation frequencies having different bands according to an input control voltage. Each of the vol... | 11/16/2010 |
| 7821343 | Transmitter with multiple phase locked loops A transmitter that includes a first phase locked loop (PLL) and a second PLL coupled to the first PLL is described. In one implementation, the first PLL is an inductance-capacitance (LC) type PLL and the second PLL is a ring type PLL. Also, in one embodiment, the tr... | 10/26/2010 |
| 7772928 | Arrangement for phase synchronization according to the master/slave principle An apparatus for the phase synchronization of several devices, wherein one device is the master device and the other devices are slave devices, with a phase synchronization unit for every device, each of which has: a first controlled oscillator for producing a maste... | 08/10/2010 |
| 7728674 | Voltage-controlled oscillator methods and apparatus Methods and apparatus are provided for generating a clock signal with relatively high bandwidth and relatively low phase noise. A circuit of the invention can include a pair of transistors serially coupled between a signal of relatively high voltage and a source of ... | 06/01/2010 |
| 7656235 | Communication system and oscillation signal provision method A communication system and an oscillation signal provision method based thereon are provided. In the communication system, a high frequency oscillator generates a first high frequency signal upon receipt of an enable signal. The first high frequency signal is common... | 02/02/2010 |
| 7646254 | 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... | 01/12/2010 |
| 7626462 | Fractional-N based digital AFC system with a translational PLL transmitter A fractional-N based Automatic Frequency Control (AFC) system for a mobile terminal is provided. In general, automatic frequency control is implemented in a frequency synthesizer to correct or compensate for a frequency error of an associated reference oscillator. T... | 12/01/2009 |
| 7602253 | Adaptive bandwidth phase locked loop with feedforward divider In some embodiments, a chip includes first and second sub phase lock loops (sub-PLLs) including first and second voltage controlled oscillators (VCOs) to provide first and second VCO output signals and first and second feedforward divider circuits to divide first an... | 10/13/2009 |
| 7602254 | System and method for generating signals with a preselected frequency relationship in two steps System and method for generating multiple local oscillator signals comprising a first-stage phase-locked loop (PLL) having an input to receive a first reference signal input and having an output to transmit a second reference signal, wherein the second reference sig... | 10/13/2009 |
| 7586377 | Real time clock A real time clock assembly includes paired crystal oscillators that experience changes in frequency responsive to temperature. The differences in frequency changes between the paired crystal oscillators are utilized to determine a temperature utilized to compensate ... | 09/08/2009 |
| 7579916 | Low noise frequency synthesizer A frequency synthesizer comprising an input large step frequency source suitable for generating a large step frequency, a variable frequency source suitable for generating a small step frequency, a first phase detector, a first voltage controlled oscillator, a first... | 08/25/2009 |
| 7570121 | Frequency jittering control circuit and method for using the same A frequency jittering control circuit wherein by means of the characteristics of a PLL whose input switches between different frequencies, the output frequency of the PLL swings between the different frequencies to achieve the desired frequency jittering. ... | 08/04/2009 |
| 7567131 | Device for ultra wide band frequency generating Devices (1) for exchanging ultra wide band signals comprise frequency translating stages (20,30) for frequency translating signals and oscillating stages (40) for supplying main inphase/quadrature oscillation signals to the frequency translating... | 07/28/2009 |
| 7557662 | Oscillator and frequency detector In an oscillating apparatus or a frequency detecting apparatus in which a center frequency and a variable frequency range are freely or optionally established with a high stability and a high accuracy, a first frequency component of a signal from a first crystal osc... | 07/07/2009 |
| 7548120 | Frequency switching method A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency sig... | 06/16/2009 |
| 7541878 | Temperature compensated crystal oscillator An apparatus, comprising: a first oscillator made from piezoelectric material to oscillate at a first frequency; a second oscillator to oscillate at a second frequency; a comparator to compare the first frequency to the second frequency; and a controller to change t... | 06/02/2009 |
| 7528665 | Multiple frequency source system and method of operation A multiple frequency source system includes at least one frequency source tunable to a predefined target frequency, and at least one additional frequency source operable to generate a second signal at a frequency which is either higher or lower than the target frequ... | 05/05/2009 |
| 7508272 | Methods and systems to provide a plurality of signals having respective different phases A system for generating multiple synthesized clocks having an input terminal for receiving a reference signal, a phase locked loop circuit coupled to the input signal terminal, where the phase locked loop circuit is capable of generating a plurality of output signal... | 03/24/2009 |
| 7508271 | Semiconductor memory apparatus having phase locked loop A semiconductor memory apparatus includes a PLL selector that selectively activates a plurality of PLL enable signals by decoding pluralities of PLL selection signals, and a plurality of PLL circuits that connect to a plurality of PLL enable signals respectively, wh... | 03/24/2009 |
| 7495516 | Method of establishing an oscillator clock signal A hybrid numeric-analog clock synchronizer, for establishing a clock or carrier locked to a timing reference. The clock may include a framing component. The reference may have a low update rate. The synchronizer achieves high jitter rejection, low phase noise and wi... | 02/24/2009 |
| 7463096 | Dynamic voltage and frequency management in integrated circuits This invention discloses a system and method for dynamically managing voltage and frequency in an integrated circuit (IC), comprising a plurality of ring oscillators for generating a plurality of continuous pulses with frequencies reflecting the process parameter, o... | 12/09/2008 |
| 7453323 | Circuit, control system, IC, transmitting and receiving apparatus, control method and program The present invention provides a circuit, a control system, an IC, a transmitting and receiving apparatus, a control method, and a program which can reduce a phase error and simultaneously suppress a high-frequency jitter component and a low-frequency wander compone... | 11/18/2008 |
| 7449961 | Parallel controlled connections of the plurality of ring oscillator units, PLL, radio apparatus An oscillator includes a plurality of oscillating units connected in parallel with each other, and a control unit which controls the number of parallel connections of the plurality of oscillating units based on an instruction signal indicating accuracy to be tolerat... | 11/11/2008 |
| 7439813 | Method and system for generating carrier frequencies for UWB application Apparatus and method for generating first, second and third carrier frequencies of 3432 MHz, 3960 MHz and 4488 MHz respectively, for use in a wireless transmission system deploy only first and second PLLs which are configured to generate 6336 MHz and 2640 MHz signal... | 10/21/2008 |
| 7427901 | Oscillator array, and synchronization method of the same Signals outputted from oscillators (1-1, 1-2, . . . 1-n) are in phase with signals as reflected by band elimination filters (3-1, 3-2, . . . 3-n) at elimination frequencies of the band elimination filters (3... | 09/23/2008 |
| 7414489 | Phase controlled oscillator circuit with input signal coupler An oscillating signal in an oscillator is caused to phase shift toward the phase of an input signal coupled to the oscillating signal. The resonant frequency of the oscillator is about equal to an integer multiple of the frequency of the input signal. The input sign... | 08/19/2008 |
| 7414490 | Dual-band voltage-controlled oscillator using bias switching and output-buffer multiplexing Disclosed is a dual-band voltage-controlled oscillator using bias switching and output-buffer multiplexing. The dual-band voltage-controlled oscillator includes a power supply unit for supplying a source voltage; plural voltage-controlled oscillation units for outpu... | 08/19/2008 |
