Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8098107 | Voltage/current regulator system using constant loop gain A system for providing voltage and current regulator sources based on a oscillator having variable loop gain is described. Only when the oscillator loop gain is at least the value of one does the oscillator oscillate. The oscillator's ability to oscillate is control... | 01/17/2012 |
| 7982549 | Dual self-calibrating low-power oscillator system and operation A system may include a first circuit configured to generate a first clock having a first period of oscillation, and a second circuit configured to generate a second clock having a second period of oscillation, where the difference (ΔT) between the first period of o... | 07/19/2011 |
| 7907028 | Jitter compensated numerically controlled oscillator A method for compensating NCO jitter by changing a step value used to increment an accumulator in the NCO to make up for inaccuracies, or jitters. In one approach, a remainder in the accumulator may be monitored and a compensated clock close to the current edge of a... | 03/15/2011 |
| 7728683 | Phase recovery circuit A phase recovery circuit for avoiding noise interfering with the clock signal generated from an oscillator is disclosed. The phase recovery circuit includes a noise detector, a phase detector, and a phase locker. The noise detector detects noise and accordingly gene... | 06/01/2010 |
| 7719374 | Oscillator signal stabilization An oscillator signal stabilization method is provided for a radio transceiver, for example. In the present stabilization method, amplitude variation of a radio frequency oscillator signal generated by a frequency-adjustable oscillator signal generator is stabilized ... | 05/18/2010 |
| 7671690 | Method and signal control system providing fast transitions in an oscillating signal In one embodiment, a signal control system has a signal output and includes: 1) a phase-locked loop (PLL) having a voltage-controlled oscillator (VCO), a phase error detector, an oscillating output coupled to the signal output of the signal control system, and a pro... | 03/02/2010 |
| 7545228 | Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators A method for generating a temperature-compensated timing signal that includes counting, within an update interval, a first number of oscillations of a first micro-electromechanical (MEMS) resonator, a second number of oscillations of a second MEMS resonator and a th... | 06/09/2009 |
| 7522009 | Oscillation stabilization circuit An oscillation stabilization detecting circuit comprises a T flip flop receiving a pulse-type oscillation signal generated by oscillating a crystal oscillator and then dividing the oscillation signal to output; a pulse control unit including inverters and transistor... | 04/21/2009 |
| 7408416 | Phase locked loop, signal generating apparatus and synchronization method A phase locked loop for outputting a high frequency signal by executing synchronization and frequency conversion based on an input signal includes a control-type oscillator, and a phase comparator circuit for comparing a phase of the input signal and a phase of an o... | 08/05/2008 |
| 7405632 | Voltage-controlled oscillator, transmitter, and receiver A voltage-controlled oscillator includes (i) a first variable-capacity element, (ii) a resonance circuit whose resonance frequency changes in accordance with a control voltage applied to the first variable-capacity element, (iii) a second variable-capacity element c... | 07/29/2008 |
| 7398163 | Sensing apparatus An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree of precision. As a specific means for solving the problem, a frequen... | 07/08/2008 |
| 7394324 | Method and system to calibrate an oscillator within an RFID circuit utilizing a test signal supplied to the RFID circuit In accordance with one aspect of the present invention, there is provided a method of calibrating an oscillator within a radio-frequency identification (RFID) circuit for use in an RFID tag. The oscillator has an oscillation frequency. A calibration value is stored ... | 07/01/2008 |
| 7391276 | Oscillation apparatus capable of compensating for fluctuation of oscillation frequency In an oscillation apparatus formed by a ring oscillator including an odd number of inverters (more than two inverters) connected in a ring, each of the inverters having one drive MOS transistor and one load MOS transistor, a constant voltage generating circuit is ad... | 06/24/2008 |
| 7391273 | Clock signal output apparatus and control method of same, and electric apparatus and control method of same The clock signal output device has a crystal oscillator for generating a reference clock signal and generating and outputting an output clock signal having a prescribed frequency on the basis of the reference clock signal. The device also has an atomic oscillator fo... | 06/24/2008 |
| 7372341 | Noise immunity circuitry for phase locked loops and delay locked loops A clock circuit. The clock circuit includes a phase detector and an output unit. The phase detector is coupled to receive a reference clock signal and an output clock signal, and is configured to provide a phase signal indicative of a phase difference between the re... | 05/13/2008 |
| 7369004 | Microelectromechanical oscillator and method of operating same There are many inventions described and illustrated herein. In one aspect, the present inventions relate to a temperature measurement system comprising (1) a first microelectromechanical resonator to generate a first output signal having a frequency that varies with... | 05/06/2008 |
| 7369000 | Adaptive frequency detector of phase locked loop An adaptive frequency detector used in a phase locked loop for detecting a frequency difference between an input signal and an output clock generated from an oscillator of the phase locked loop includes: a frequency comparator for generating an up signal or a down s... | 05/06/2008 |
| 7369003 | Oscillator system having a plurality of microelectromechanical resonators and method of designing, controlling or operating the same There are many inventions described and illustrated herein. In one aspect, the present inventions relate to oscillator systems which employ a plurality of microelectromechanical resonating structures, and methods to control and/or operate same. The oscillator system... | 05/06/2008 |
| 7352256 | Crystal oscillation circuit A crystal oscillation circuit can correctly suppress the resonance of a B mode, thereby correctly excite the resonance of a C mode. Since the crystal oscillation circuit uses a quartz oscillator of an SC cut or an IC cut, the B mode (unnecessary mode) frequency is c... | 04/01/2008 |
| 7342460 | Expanded pull range for a voltage controlled clock synthesizer A technique provides a clock source that meets accuracy requirements, allows the use of a low cost resonator, provides a wide range of output frequencies, and provides suitable phase noise performance. The technique generates a clock signal having a target output fr... | 03/11/2008 |
| 7342465 | Voltage-controlled oscillator with stable gain over a wide frequency range An apparatus and method for providing a stable gain over wide frequency range in a VCO are presented. A VCO uses a waveform generator along with a bias generator having a frequency select input. The frequency select input is used to adjust the amount of output curre... | 03/11/2008 |
| 7342461 | Feedback circuit for minimizing VCO sensitivity System and method for adjusting supply voltage to VCO to minimize affects of circuit noise on VCO. Method includes obtaining a number of data points each by incrementing a counter by the number of VCO periods during a phase of a local oscillator, changing the supply... | 03/11/2008 |
| 7338817 | Body bias compensation for aged transistors Embodiments of the invention include on-chip transistor degradation detection and compensation. In one embodiment of the invention, an integrated circuit is provided including a circuit with a body bias terminal coupled to a body of one or more transistors to receiv... | 03/04/2008 |
| 7327197 | Radiation hardened phase locked loop A method and apparatus for providing a radiation hardened Phase Locked Loop (PLL) are presented. The radiation hardened PLL includes an adjustable bandwidth loop filter. The adjustable filter modifies an unfiltered voltage control signal and provides a stable voltag... | 02/05/2008 |
| 7327201 | Semiconductor integrated circuit device and wireless communication device A semiconductor integrated circuit device having a voltage controlled oscillation circuit that is capable of sufficient oscillation performance and a wireless communication device having the semiconductor integrated circuit device are disclosed. A difference between... | 02/05/2008 |
| 7323946 | Lock detect circuit for a phase locked loop An improved system and method for determining the lock condition of a Phase Locked Loop (PLL) is described. The lock detect circuit generates a fast lock detect signal that may be used to detect a transient loss of lock. The lock detect circuit may also include a ph... | 01/29/2008 |
| 7323942 | Dual loop PLL, and multiplication clock generator using dual loop PLL To provide dual loop PLLs capable of reducing the lock-up time in the initial start-up, and multiplication clock generators contributing to reduction of the power dissipation. The dual loop PLL comprises a dual loop PLL having a phase comparison loop having a phase ... | 01/29/2008 |
| 7321270 | Current-controlled CMOS ring oscillator circuit A ring oscillator having an odd number of active elements connected in series, where the signal output of one active element is connected to the signal input of the next active element to form a closed ring of active elements. Each active element has a power supply ... | 01/22/2008 |
| 7319358 | Method and apparatus for generating an adaptive power supply voltage In a method and apparatus for generating a power supply voltage, an integrated circuit including an adaptive power supply voltage circuit is provided where a target signal is generated representing an ideal or approximated ideal performance characteristic of a funct... | 01/15/2008 |
| 7302055 | Discharging envelope detector A receiver to detect pulses on a home phone wiring network using envelope detection. The receiver comprises an integrating capacitor charged by a first current source responsive to a differential signal propagated on the wiring network, and discharged by a FET in co... | 11/27/2007 |
| 7298226 | Noise tolerant voltage controlled oscillator A noise tolerant voltage controlled oscillator is described. The voltage controlled oscillator include a varactor element as part of an LC tank circuit. The varactor element is biased by a bias signal and a bias-dependent control signal. The bias-dependent control s... | 11/20/2007 |
| 7292117 | Temperature-compensated piezoelectric oscillator A temperature compensated piezoelectric oscillator includes: an oscillation circuit that drives a piezoelectric element with a current; a direct-current-stopping fixed capacitor; a frequency-temperature compensated circuit that compensates the deviation of an oscill... | 11/06/2007 |
| 7292114 | Low-noise high-stability crystal oscillator Circuits, methods, and apparatus that provide low-noise, high-stability crystal oscillators having controlled-amplitude differential output signals and DC level control. A crystal oscillator circuit has two feedback loops, one for setting the DC level of its signals... | 11/06/2007 |
| 7276925 | Operating an integrated circuit at a minimum supply voltage In one embodiment, an integrated circuit comprises at least one measurement unit configured to generate an output indicative of a supply voltage at which the integrated circuit is operable for a given operating frequency and a control unit coupled to receive the out... | 10/02/2007 |
| 7271675 | Automatic gain control circuit and method and super-regenerative RF receiver An automatic gain control (AGC) circuit is applied to control a margin voltage of an oscillator. The margin voltage is the voltage difference between a high-level output and a low-level output of the oscillator. The AGC circuit of the present invention includes a co... | 09/18/2007 |
| 7268631 | Phase locked loop with scaled damping capacitor In order to reduce the area of a charge pump PLL, one may separate proportional component and integral component of the loop filter voltage, and add additional circuitry so as to make the integral component appear as though it is affected by a much larger value of c... | 09/11/2007 |
| 7265641 | Oscillator circuit arrangement with an automation feedback control A circuit arrangement for generating oscillations with a defined frequency includes an oscillator circuit (30, 32) for generating the oscillations and a dedamping circuit (18, 20) connected to the oscillator circuit for compensating any damping of the ... | 09/04/2007 |
| 7262670 | Low thermal drift, tunable frequency voltage controlled oscillator An oscillator comprising a cascode configured device having first, second and third terminals, a plurality of resonators and first circuitry coupled between the plurality of resonators and the second terminal of the cascode configured device. The first circuitry is ... | 08/28/2007 |
| 7262671 | Amplitude level control circuit Amplitude level control circuit for an oscillator comprising first means arranged to generate a first current for driving the oscillator; and second means arranged to generate a second current such that in direct current conditions the second current is arranged to ... | 08/28/2007 |
| 7253767 | Flat model software compensated crystal oscillator for GPS receiver A GPS receiver comprises a crystal oscillator with a manufacturer's characteristic curve, a GPS radio, a TCO temperature sensor, and a GPS receiver software. The crystal oscillator serves as a local reference oscillator for the GPS radio. The GPS receiver software i... | 08/07/2007 |
