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| Number | Title | Issue Date |
| 8138846 | Precision, temperature stable clock using a frequency-control circuit and a single oscillator 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... | 03/20/2012 |
| 8058942 | Dual reference oscillator phase-lock loop A phase-locked loop has a stable high frequency reference oscillator to provide a stable high frequency reference signal that has reference frequency that is a small submultiple of a generated frequency of a voltage controlled oscillator within the phase-locked loop... | 11/15/2011 |
| 7982552 | Automatic frequency calibration apparatus and method for a phase-locked loop based frequency synthesizer An automatic frequency calibration apparatus and a method thereof for a phase-locked loop based frequency synthesizer are disclosed. The apparatus includes a frequency-to-digital converter configured to convert a frequency of a VCO output signal to a first digital v... | 07/19/2011 |
| 7940139 | Voltage-controlled oscillator, frequency synthesizer, and oscillation frequency control method In a voltage-controlled oscillator capable of broadening a variable frequency range while suppressing increase of conversion gain, a converter (12) converts an input voltage to a first physical quantity, a variable converter (13) supplies a second phys... | 05/10/2011 |
| 7830216 | Precision, temperature stable clock using a frequency-control circuit and a single oscillator 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... | 11/09/2010 |
| 7733192 | Voltage controlled oscillator According to one aspect of the present invention, there is provided a voltage controlled oscillator controlling frequency of an output signal according to input voltage, the voltage controlled oscillator including a current controlled oscillator setting the frequenc... | 06/08/2010 |
| 7636022 | Adaptive play-out buffers and clock operation in packet networks Methods and apparatus are described for a play-out buffer. A method includes writing a data packet into a jitter buffer at a write address specified by a write address generator; incrementing the write address generator; generating the difference between the write a... | 12/22/2009 |
| 7612625 | Bang-bang architecture In one embodiment, the present invention includes an apparatus having a voltage controlled oscillator (VCO) to generate a first clock signal having a frequency controlled by a bias current coupling ratio of first and second bias currents, and a control circuit coupl... | 11/03/2009 |
| 7576622 | Method of generating an output of a frequency synthesizer A method of generating an output of a frequency synthesizer is disclosed. The method comprises the steps of generating an output of the frequency synthesizer based upon frequency synthesizer values and a reference clock signal; receiving a command comprising a first... | 08/18/2009 |
| 7443260 | Low-power oscillator A circuit can include an oscillator core that outputs, in response to a bias signal, a periodic signal having an oscillation frequency; a bias circuit that, when powered, provides the bias signal (e.g., a voltage) to the oscillator core; and a switching circuit that... | 10/28/2008 |
| 7439815 | Method and apparatus for switching on an ultrasound oscillation system In a method and a circuit arrangement for operating an ultrasound oscillation system, wherein an excitation voltage is applied to an ultrasound oscillation system comprising an ultrasound oscillator and components for forming an oscillation circuit for generating an... | 10/21/2008 |
| 7432768 | Voltage controlled digital analog oscillator and frequency synthesizer using the same Provided are a voltage controlled digital analog oscillator and a frequency synthesizer using the same, the oscillator comprising an oscillator having a frequency of an output signal being determined by a voltage inputted to an analog input end and a digital value i... | 10/07/2008 |
| 7432769 | Oscillator circuit The oscillating unit 11 generates a signal having a frequency of n*f, i.e., n times a target frequency f. The control voltage generation circuit 21 compares the phase difference between a divided signal of a signal generated in the oscillating unit ... | 10/07/2008 |
| 7432773 | Method, system and apparatus for reducing oscillator frequency spiking during oscillator frequency adjustment Current sources are selectively coupled to a current controlled frequency determining circuit of an oscillator. A buffer amplifier has an input coupled to the current controlled frequency determining circuit of the oscillator and the buffer amplifier output is selec... | 10/07/2008 |
| 7417512 | Dual mode tuning digitally controlled crystal oscillator and operation method thereof A dual mode tuning digitally controlled crystal oscillator includes a crystal resonator, an oscillation circuit, a coarse mode tuning unit and a fine mode tuning unit. The crystal resonator resonates at substantially a predetermined resonance frequency. The oscillat... | 08/26/2008 |
| 7411464 | Systems and methods for mitigating phase jitter in a periodic signal An oscillator circuit can generate a periodic signal, and a frequency adjustment circuit can adjust the frequency of the periodic signal. The periodic signal may include phase jitter. In one aspect of the invention, the phase jitter may be mitigated by connecting ot... | 08/12/2008 |
| 7411461 | Frequency and/or phase lock loops with beat frequency estimation A control loop (10) for producing an output signal with a stable nominal frequency is provided. The control loop includes inputs for reference (11) and oscillator (25) output signals, a beat frequency generator (12) for producing a signal... | 08/12/2008 |
| 7408420 | Multi mode clock generator In some embodiments, a clock generator is provided that provides a generator clock. The clock generator comprises a first clock source to provide a first clock and a second clock source to provide a second clock whose frequency at least indirectly tracks a supply to... | 08/05/2008 |
| 7408415 | Voltage controlled oscillator phase locked loop circuit with loop filter capacitance tuning A phase locked loop circuit comprises a voltage controlled oscillator with a control input to which a variable control voltage is applied and a phase-frequency discriminator with an output connected to a loop filter to produce the control voltage. To provide the pha... | 08/05/2008 |
| 7405633 | Methods and apparatus for loop bandwidth control for a phase-locked loop A method for controlling loop bandwidth of a phase locked loop is described. The method includes setting the loop bandwidth to a value, calculating at least one of a phase error and a frequency change that occur subsequent to any setting or adjusting of loop bandwid... | 07/29/2008 |
| 7400210 | Voltage controlled oscillator, PLL circuit, pulse modulation signal generating circuit, semiconductor laser modulation device and image forming apparatus An oscillation frequency control part includes a voltage-to-current converting circuit converting an input voltage to a current having a value corresponding to the input voltage, and outputting a current in proportion to the current obtained from the voltage-to-curr... | 07/15/2008 |
| 7397316 | Ring oscillator for calibrating phase error and phase-error calibration method therefor A ring oscillator and a phase error calibration method are provided. The ring oscillator may include a first voltage-current converter for controlling and outputting an amount of tail current Itail according to a magnitude of a first control voltage applied in feedb... | 07/08/2008 |
| 7394322 | Phase locked loop A phase locked loop circuit, for providing an oscillating output signal at an output frequency, including: a reference counter; a loop counter; a phase detector having a first input coupled to the reference counter and a second input coupled to the loop counter; a v... | 07/01/2008 |
| 7394320 | Phase-locked loop and method for operating a phase-locked-loop A phase-locked loop suitable for mobile radio communications and a method for operating the same is disclosed. One embodiment of the phase-locked loop comprises an oscillator, a counter, a comparator, and a delay arrangement. The counter comprises a first input conn... | 07/01/2008 |
| 7388443 | Apparatus and method for wide tuning-range ring oscillators An integrated circuit (IC) includes a ring oscillator. One may tune the ring oscillator by controlling a power supply of the ring oscillator. One may further tune ring oscillator by varying a capacitance of at least one varactor. Using the tuning techniques, one may... | 06/17/2008 |
| 7385451 | Arrangement, phase locked loop and method for noise shaping in a phase-locked loop A noise shaping arrangement for a phase locked loop includes a first order sigma-delta modulator arranged to provide a first-order quantized output and a feedback path output. A second order sigma-delta modulator is arranged to receive the feedback path output and p... | 06/10/2008 |
| 7369009 | Oscillator device for frequency modulation The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator (1) with automatic amplitude control (5, 6, 7) is provided. The shift keying is not realized with reconnectable capacitan... | 05/06/2008 |
| 7365612 | Low noise, hybrid tuned wideband voltage controlled oscillator An oscillator comprising an active device having first, second and third terminals, a plurality of micro-stripline resonators coupled together to form a coupled-resonator network, the coupled-resonator network being coupled to the second terminal of the active devic... | 04/29/2008 |
| 7358820 | Method and device for stabilizing a transfer function of a digital phase locked loop In a method for stabilizing a transfer function of a digital phase locked loop a random digital signal is fed into the phase locked loop. The phase locked loop comprises the transfer function and a phase locked loop gain which changes with time due to disturbances a... | 04/15/2008 |
| 7352251 | Systems and methods for suppressing feedback and reference noise in a phase lock loop circuit Various systems and methods for clock management. As one example, a system for clock management is disclosed that includes a controllable oscillator, an oscillation control source, and a sample and hold circuit. The sample and hold circuit is disposed between the os... | 04/01/2008 |
| 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 |
| 7339439 | Voltage-controlled oscillator with multi-phase realignment of asymmetric stages A multi-phase realigned voltage-controlled oscillator (MRVCO) achieves phase realignment based on charge injection in the VCO stages. The individual VCO stages provide an oscillating output signals having an asymmetric waveform with substantially different rise and ... | 03/04/2008 |
| 7336137 | PLL frequency setting circuit A frequency setting circuit includes a table storing, in an address corresponding to a channel number, a quotient and a remainder calculated by subtracting 1 from the channel number to calculate a difference and dividing the difference by 3 are stored in bits b7 | 02/26/2008 |
| 7332975 | Reference-less clock circuit A programmable reference-less oscillator provides a wide range of programmable output frequencies. The programmable reference-less oscillator is implemented on an integrated circuit that includes a free running controllable oscillator circuit such as a voltage contr... | 02/19/2008 |
| 7327195 | PLL frequency synthesizer A PLL frequency synthesizer is provided with a linearization circuit 6 which receives an oscillation frequency control signal VT from a loop filter LF. The linearization circuit 6 outputs a charge pump current control signal CPCONT | 02/05/2008 |
| 7321272 | Device for detecting the temperature of an oscillator crystal In a device for detecting the temperature of an oscillator crystal 2, arranged on a carrier, in particular in a mobile radio apparatus, the detected temperature should be as exact as possible a replica of the temperature to which the oscillator crystal 2 | 01/22/2008 |
| 7315220 | Voltage controlled oscillator A voltage controlled oscillator (VCO) having a single stage ring-oscillator having both coarse and fine control of the frequency of oscillation is described. In an embodiment the VCO may include a first n-channel latch having a first output and a second output; a fi... | 01/01/2008 |
| 7312663 | Phase-locked loop having a bandwidth related to its input frequency An integrated circuit includes a phase-locked loop (PLL) in which the loop bandwidth of the PLL is proportional to the input frequency of the PLL. The PLL includes a phase/frequency detector (PFD), a charge pump, a loop filter, and a voltage-controlled oscillator (V... | 12/25/2007 |
| 7312664 | Methods and apparatuses for testing a voltage-controlled oscillator (VCO) to verify operation across supply voltage and/or temperature Methods and apparatuses for testing a calibrated VCO to determine whether the VCO has adequate fine frequency tuning capability. A range of coarse frequency tuning calibration settings are determined from coarse frequency tuning calibration settings obtained during ... | 12/25/2007 |
| 7310242 | Self-shielding high voltage distribution box A distribution box for enclosing an electrical connection in an electrical wiring system includes a housing that is resistive to penetration by electromagnetic fields and a plurality of electrical conductors that form the electrical connection. A mirror plate is dis... | 12/18/2007 |
