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| Number | Title | Issue Date |
| 8106715 | Low-power oscillator In order to decrease the temperature sensitivity of an oscillator output, and obtain a frequency of oscillation that remains stable over variations in temperature, two oscillators may be configured with identical comparators and logic circuitry, but having different... | 01/31/2012 |
| 8058934 | Apparatus and method for frequency generation A wideband frequency generator has two or more oscillators for different frequency bands, disposed on the same die within a flip chip package. Coupling between inductors of the two oscillators is reduced by placing one inductor on the die and the other inductor on t... | 11/15/2011 |
| 8058933 | Low frequency clock generation A first and a second resonator are fabricated monolithically adjacent to one another. The first resonator is the reference resonator. The resonant frequency of the second resonator is offset by a difference frequency Fo from the first resonator. Each resonator is in... | 11/15/2011 |
| 8054138 | Multi-oscillator circuit with variable power supply This invention makes it possible to reduce a power consumption of an electronic circuit (microcomputer, for example) while preventing malfunctioning of an oscillator by appropriately setting a power supply impedance of a low frequency oscillator corresponding to an ... | 11/08/2011 |
| 7902930 | Colpitts quadrature voltage controlled oscillator Provided is a colpitts quadrature voltage controlled oscillator capable of obtaining quadrature orthogonal signals using a quadrature combination between a base and a collector of each transistor, without using an additional circuit such as a coupled transistor, a c... | 03/08/2011 |
| 7808327 | Method and apparatus to provide digitally controlled crystal oscillators Methods and systems to provide digitally controlled crystal oscillators are disclosed. One example method includes determining a state of an oscillator system and selecting a first output of a digitally controlled crystal oscillator or a second output of a second os... | 10/05/2010 |
| 7772933 | Multiple band oscillator system In one embodiment, a multiple band oscillator system is disclosed which comprises a first oscillator having a first input, a resonating element, a first output, and a second output. In addition, the multiple band oscillator system also comprises a second oscillator ... | 08/10/2010 |
| 7764130 | Electronic circuitry A clock distribution system that includes a length of two-conductor transmission line driven differentially at one end and terminated at the other end, a plurality of regeneration devices, and a plurality of regeneration device pairs. The two-conductor transmission ... | 07/27/2010 |
| 7764131 | Precision, temperature stable clock using a frequency-control circuit and dual oscillators A frequency-control circuit, which is configured to receive a first signal having a first untuned frequency from a first oscillator, and to alter one or more pulses of the first signal to tune an output frequency of an output clock signal to have an average frequenc... | 07/27/2010 |
| 7679457 | Oscillating apparatus Provided is an oscillating apparatus that includes a plurality of variable frequency oscillators, each of which is provided in correspondence with a different oscillating band from one another; and a selection section that selects an oscillating signal that is from ... | 03/16/2010 |
| 7675371 | Electronic circuitry Electronic circuitry comprising operational circuits of active switching type requiring timing signals, and conductive means for distributing said timing signals to the operational circuits, wherein the timing signal distribution means includes a signal path that ha... | 03/09/2010 |
| 7592875 | Injection-locked oscillator circuit An ILO circuit has a plurality of oscillator stages which are coupled to one another by means of a “tank lock” coupling. The coupling leads to an improved synchronization of the individual oscillator stages and thus to a reduced phase noise. Any desired LC oscil... | 09/22/2009 |
| 7436266 | LC quadrature VCO having startup circuit Provided is an Inductor-Capacitor (LC) quadrature Voltage Controlled Oscillator (VCO) having a startup circuit which can accurately select one of +90° and −90° as a phase difference between two clocks generated by the LC quadrature VCO by embodying the startup c... | 10/14/2008 |
| 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 |
| 7420429 | Source coupled differential complementary colpitts oscillator A source coupled differential complementary Colpitts oscillator is described, which enables a differential oscillation and also can improve phase noise performance by source-coupling a complementary Colpitts oscillator using an inductor. A differential complementary... | 09/02/2008 |
| 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 |
| 7411867 | Stable composite clock Apparatus and method for producing a composite clock signal with optimized stability characteristics from individual clocks which have different stabilities or variances. The composite clock signal includes weighted individual clock signals. In a first (PPN) case, a... | 08/12/2008 |
| 7400209 | Oscillator circuit Present invention relates to an oscillator circuit comprising: resonator means (102) and, first and second emitter followers (116, 118) being symmetrically coupled to the resonator means and been connected to further emitter followers (120, 122)... | 07/15/2008 |
| 7397311 | Oscillator coupling to reduce spurious signals in receiver circuits A first receiver frequency reference is passively coupled to a second receiver by tapping a signal directly from the resonant element, such as a crystal, of an oscillator in the first receiver to drive the input of the second receiver. The sinusoidal signal from the... | 07/08/2008 |
| 7394321 | Quadrature VCO system and method A low-power quadrature generator is provided for accurately generating in-phase signals and quadrature signals. ... | 07/01/2008 |
| 7375601 | Dual-band oscillator When two oscillation signals are output from a common terminal through switching, to reduce attenuation of the oscillation signals, a dual-band oscillator includes a first oscillating transistor for generating an oscillation signal in a first frequency band; a first... | 05/20/2008 |
| 7375596 | Quadrature voltage controlled oscillator A quadrature voltage controlled oscillator having low phase noise and excellent output swing characteristics includes a first voltage controlled oscillator for outputting a positive in-phase output signal and a negative in-phase output signal; a second voltage contr... | 05/20/2008 |
| 7365565 | Programmable system on a chip for power-supply voltage and current monitoring and control A programmable system-on-a-chip integrated circuit device includes a programmable logic block, at least one user non-volatile memory block, and voltage-measuring and control analog and digital circuits on a single semiconductor integrated circuit chip or a flip chip... | 04/29/2008 |
| 7362188 | System-on-a-chip (SoC) clock management—a scalable clock distribution approach System and method for providing clocks to digital circuitry with a need for multiple clocks. A preferred embodiment comprises an oscillator controller (oscillator clock domain block 305) distributes a system clock generated by an oscillator to a plurality of ... | 04/22/2008 |
| 7352206 | Integrated circuit device having state-saving and initialization feature An integrated circuit device has a state-saving feature and includes a programmable logic block, I/O pads, a dedicated register, at least one volatile memory block, a non-volatile memory block, a condition-sensing circuit for detecting at least one condition, A cont... | 04/01/2008 |
| 7348846 | Amplifier arrangement The present invention relates to an amplifier arrangement having a plurality of amplifier stages that form a series circuit. Each amplifier stage comprises a current mirror, the translation ratio of which defines the gain of the amplifier stage. Moreover, a current ... | 03/25/2008 |
| 7342462 | Quadrature LC voltage controlled oscillator with opposed bias and coupling control stages A voltage controlled oscillator unit is provided with cross coupled voltage controlled oscillators to generate quadrature phases. One control stage adjusts coupling between the oscillators. Another control stage adjusts the tail current that applies operating bias t... | 03/11/2008 |
| 7332977 | Crystal clock generator operating at third overtone of crystal's fundamental frequency A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of the product gm×(Xc1)×(Xc2) is greater than the effec... | 02/19/2008 |
| 7330080 | Ring based impedance control of an output driver One embodiment in accordance with the invention is a method that can include utilizing a ring oscillator module to determine a process corner of an integrated circuit as fabricated that includes the ring oscillator module. The impedance of an output driver of the in... | 02/12/2008 |
| 7323945 | Programmable radio transceiver A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple ra... | 01/29/2008 |
| 7321942 | Performance counter for adding variable work increment value that is dependent upon clock frequency A performance counter accumulates a value by periodically adding a variable increment value representing the amount of work performed. The increment value can be varied in dependence upon the processor clock frequency and may be adjusted under hardware and/or softwa... | 01/22/2008 |
| 7319366 | Offset local oscillator without using frequency divider A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic... | 01/15/2008 |
| 7317362 | Oscillator circuit and oscillation control method An oscillator circuit is disclosed that includes a first oscillation part configured to output a first oscillation output by charging and discharging a first capacitor, and a second oscillation part configured to output a second oscillation output by charging and di... | 01/08/2008 |
| 7317361 | Ensemble oscillator and related methods An ensemble clock comprises: an input for receiving a reference signal; multiple free-running oscillators each configured to generate a corresponding free-running frequency; an output oscillator configured to generate a controlled frequency having a frequency respon... | 01/08/2008 |
| 7313369 | Communication semiconductor integrated circuit and radio communication system A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for ... | 12/25/2007 |
| 7307482 | Ring oscillator setting apparatus and method depending on environmental changes of an image formation apparatus A ring oscillator setting apparatus and method depending on an environmental change of an image formation apparatus is provided. The apparatus includes a plurality of ring oscillators for generating different oscillation frequencies. The apparatus further includes a... | 12/11/2007 |
| 7304548 | Differential voltage controlled oscillator using complementary transistors cross-coupled in series, and transceiver using the same A differential voltage controlled oscillator comprises first and second transistors having opposite magnitudes and directions of currents flowing to a third electrode from a second electrode corresponding to a voltage between first and second electrodes; and a reson... | 12/04/2007 |
| 7301415 | Automatic frequency tuning in a phase lock loop A method for automatic frequency tuning in a phase lock loop suitable for use in multi-band VCO wireless systems having very limited initial frequency lock times is disclosed. A predetermined subset of VCOs out of a larger bank of VCOs is selected to serve as interp... | 11/27/2007 |
| 7288980 | Multiple mode clock receiver A multiple mode clock receiver including first and second input AC-coupled capacitors, first and second voltage dividers and a differential amplifier. The voltage dividers each include first and second junctions, respectively, coupled to the first and second AC-coup... | 10/30/2007 |
| 7271622 | Quadrature voltage controlled oscillators with phase shift detector In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of two differential modified Colpitts oscillators. A capacitor bank allows... | 09/18/2007 |
