Patents in Class 331/25

Matches 1 - 50 out of 1997

Match	Document	Document Title
1	7619483	Asynchronous phase acquisition unit with dithering A digital phase locked loop includes a phase acquisition unit receiving a sampled input signal and applying its output to a first input of a digital phase detector, a digital controlled oscillator...
2	7616069	Method and system for fast PLL close-loop settling after open-loop VCO calibration Aspects of a method and system for a fast phase-locked loop (PLL) close-loop settling after an open-loop voltage controlled oscillator (VCO) calibration are provided. A fractional-N PLL synthesizer...
3	7616065	System and method for charge-pump with phase-frequency detection capability A method of generating a correction signal for a voltage controlled oscillator (VCO) includes receiving a first signal in a correction current generator, changing a state of a first error signal...
4	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...
5	7612619	Phase detector device and method thereof A device and method for phase detection are disclosed. The device includes a phase differential module that provides a phase difference signal based on the phase difference between a data signal...
6	7612617	Voltage-controlled oscillator gain calibration for two-point modulation in a phase-locked loop A phase-locked loop (PLL) is arranged to receive high-pass data at a first input and low-pass data at a second input. A first digital input is coupled to a primary path through a digital-to-analog...
7	7605667	Frequency synthesizer with a harmonic locked phase/frequency detector A frequency synthesizer. The frequency synthesizer comprises a harmonic locked phase/frequency detector, a low pass filter, a voltage controlled oscillator, and a frequency divider. The harmonic...
8	7605666	High frequency digital oscillator-on-demand with synchronization A High Frequency Digital Oscillator contains a ring oscillator having an output fn, and having coarse and fine frequency adjustments, wherein the input signal f 1 is the input to both the ring...
9	7605665	Fractional-N phase locked loop An apparatus and method is disclosed to substantially reduce phase noise introduced in fractional-N phase-locked loop (PLL) through feedback modulation. A fractional frequency divider is introduced...
10	7605662	Oscillator controller incorporating a voltage-controlled oscillator that outputs an oscillation signal at a desired oscillation frequency An oscillator controller has a phase frequency detector that compares a reference signal and a frequency-divided signal and outputs a phase difference signal; a charge pump; a loop filter that...
11	7603095	Apparatus and method of switching intervals The present invention provides a way of hysteretic switching for efficiently reducing the heavy switching between two adjacent coarse intervals. The present invention disposes a number of fine...
12	7599462	Hybrid analog/digital phase-lock loop with high-level event synchronization A hybrid analog/digital phase-lock loop with high-level event synchronization provides a mechanism for generating a low-jitter clock from a timing reference that has a high jitter level and...
13	7596052	Method and apparatus for reducing oscillation in synchronous circuits Control signal oscillation filtering circuits, delay-locked loops, clock synchronization methods and devices and system incorporating control signal oscillation filtering circuits is described. An...
14	7595699	Look loop circuit and method having improved lock time A lock loop circuit ( 230 ) includes a floating ground loop filter circuit ( 302 ) and a precharge circuit ( 304 ). The floating ground loop filter circuit includes at least one capacitive element...
15	7595698	PLL lock time reduction In general, in one aspect, the disclosure describes a method including determining a change in a lock state of a phase lock loop (PLL). Current provided to a charge pump (CP) is adjusted based on...
16	7593496	Phase interpolator A phase interpolator includes a first circuit to generate a first signal having a first phase delay and a second signal having a second phase delay and a phase mixer. The phase mixer is coupled to...
17	7592874	Phase/frequency detector, phase locked loop, method for phase/frequency detection and method for generating an oscillator signal A phase/frequency detector has a modulo counter for outputting a counter word with a predetermined word length depending on an oscillator signal. In addition, a modulo integrator for outputting an...
18	7589597	Ultra wideband and fast hopping frequency synthesizer for MB-OFDM wireless application A frequency synthesizer with a single PLL and multiple SSB mixers is presented. The frequency synthesizer includes a single PLL outputting a reference signal that is fed to a plurality of dividers...
19	7589586	High frequency signal detection circuit A high frequency signal detection circuit includes an input terminal for a high frequency signal to be detected, a switch transferring the high frequency signal as intermittent ringing signal to a...
20	7586378	Method and system for using a frequency locked loop logen in oscillator systems Aspects of a method and system for using a frequency locked loop LOGEN in oscillator systems may include generating an oscillating signal via one or more circuits comprising a feedback loop. The...
21	7583152	Phase-locked loop with self-correcting phase-to-digital transfer function A phase-locked loop includes a phase-to-digital converter portion as well as a novel correction portion. The phase-to-digital converter (PDC) portion outputs a stream of first phase error words....
22	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...
23	7573348	Arrangement and method for determining a gradient factor for a digitally controlled oscillator, and phase locked loop An arrangement for determining a gradient factor for a digitally controlled oscillator has a data alignment device and an identification device. The data alignment device can be supplied a...
24	7570124	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...
25	7564315	System and method for pre-charged linear phase-frequency detector A method for comparing phases of two signals including placing a first output node in a floating state, detecting a first edge of a first signal on a first input node after placing the first output...
26	7564313	Phase locked loop for controlling a recording device and method thereof A PLL system for generating an output signal according to a first reference signal is disclosed. The PLL system includes a clock generator to generate the output signal according to a phase...
27	7551039	Phase adjustment in phase-locked loops using multiple oscillator signals Phase-locked loop (PLL) logic comprises an oscillator that produces a first oscillator signal and phase detect logic that determines a phase difference between the first oscillator signal and a...
28	7548123	Dividerless PLL architecture A phase-locked loop (PLL) achieves initial lock using a course fractional-N divider driving a binary phase detector. Once frequency lock is achieved, this divider may be turned off, while an...
29	7545223	PLL circuit A PLL circuit according to an embodiment of the present invention includes: a phase comparator to output an up signal and a down signal based on a phase difference between a reference clock signal...
30	7541883	Coaxial resonator based voltage controlled oscillator/phased locked loop synthesizer module A synthesizer module/oscillator assembly includes a voltage controlled oscillator with a coaxial resonator. In one embodiment, the module measures 20.3 mm×14.8 mm×3.9 mm and the coaxial resonator...
31	7538706	Mash modulator and frequency synthesizer using the same A MASH modulator. The MASH modulator receives a fractional input value, generates an integer output value, and comprises three cascaded first order sigma delta modulators (SDMs) each comprising an...
32	7538625	Method and enhanced phase locked loop circuits for implementing effective testing A method and enhanced phase-locked loop (PLL) circuit enable effective testing of the PLL. A phase frequency detector generates a differential signal, receiving a reference signal and a feedback...
33	7538623	Phase locked loop modulator calibration techniques A method for calibrating a phase locked loop begins by determining a gain offset of a voltage controlled oscillator of the phase locked loop. The processing then continues by adjusting current of a...
34	7528638	Clock signal distribution with reduced parasitic loading effects Clock signal distribution systems with reduced parasitic loading effects are provided. A reference clock is frequency-divided to produce a lower frequency clock signal. A delay-locked loop (DLL)...
35	7525393	Digital frequency multiplier circuit A digital frequency multiplier circuit is disclosed. The digital frequency multiplier circuit includes a digitally controlled oscillator (DCO), a phase detector and a control circuit. The DCO...
36	7518455	Delta-sigma modulated fractional-N PLL frequency synthesizer A delta-sigma modulated fractional-N PLL frequency synthesizer is provided. The frequency synthesizer includes a phase frequency detector for receiving a reference signal with a reference frequency...
37	7515002	Frequency synthesizer for dual mode receiver In a portable dual mode receiver circuit, a dual modulus clock system is provided which can, by selective use of integer division on a multiplied master clock, select specific channels with two...
38	7508278	Asymmetry triangular frequency modulation profiles for spread spectrum clock generations Spread spectrum clock generation (SSCG) using asymmetric triangular profiles to reduce electromagnetic interference (EMI). The asymmetric triangular profiles provide better peak power attenuation...
39	7508277	Phase-locked loop with VCO tuning sensitivity compensation The invention provides a phase-locked loop (PLL). Since a loop bandwidth of the PLL is a function of a gain of a phase detector and a gain of a voltage controlled oscillator (VCO), by adjusting the...
40	7508275	Indirect analog synthesizer utilizing direct analog fractional frequency multiplier approach The present invention is an indirect analog synthesizer utilizing a direct analog fractional frequency multiplier approach. A fractional frequency multiplier produces a source that is injected into...
41	7504890	Data-directed frequency-and-phase lock loop A data-directed frequency-and-phase lock loop for an offset-QAM modulated signal comprises a first multiplier that multiplies the signal by the output of a VCO. The output of the first multiplier...
42	7498887	High frequency digital oscillator-on-demand with synchronization A High Frequency Digital Oscillator contains a ring oscillator having an output fn, and having coarse and fine frequency adjustments, wherein the input signal f 1 is the input to both the ring...
43	7498884	Self calibrating RC oscillator There is disclosed a self-calibrating resistor-capacitor (RC) oscillator in which a resistor has a resistance value varied minimally by temperature change and process variation, a capacitor has a...
44	7495517	Techniques for dynamically adjusting the frequency range of phase-locked loops Techniques are provided for dynamically adjusting the frequency range of phase-locked loops (PLLs). Phase detection circuitry in a PLL generates a control signal in response to a periodic input...
45	7492850	Phase locked loop apparatus with adjustable phase shift The phase locked loop (PLL) with adjustable phase shift is described. The PLL includes a voltage controlled oscillator which is capable of generating multiple phase shifted output signals, and...
46	7489203	Noise tolerant phase locked loop An apparatus and method for providing timing recovery under conditions of low signal to noise ratios (SNRs) is disclosed herein. A preliminary phase error signal is generated by comparing an input...
47	7486148	Controllable oscillator with output oscillation adjustment and method for producing an output oscillation for use therewith A controllable oscillator includes an output oscillation adjust module operably coupled to an oscillator for producing an effective output oscillation based on an oscillation control signal. The...
48	7471159	Phase-locked loop for stably adjusting frequency-band of voltage-controlled oscillator and phase locking method A phase-locked loop (PLL) for stably adjusting a frequency band of a voltage-controlled oscillator and a phase locking method. In the PLL, a frequency band controller alters the frequency band...
49	7471158	Automatic switching phase-locked loop An automatic switching phase-locked loop (PLL) is disclosed, including a phase detector, a charge pump generating a pump current, a band selector receiving a control voltage to produce a band...
50	7471123	Fractional-N baseband frequency synthesizer in bluetooth applications A baseband clock synthesizer having particular use in a BLUETOOTH piconet device, having the capability of generating either 12 MHz or 13 MHz clock signals generated from any reference clock...

Matches 1 - 50 out of 1997

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