Patents in Class 331/1A

Matches 1 - 50 out of 1561

Match	Document	Document Title
1	7616064	Digital synthesizer for low power location receivers A high-frequency phase locked loop synthesizer having a selectable fractional-N divider and integer divider along with a phase frequency detector implemented as a CMOS logic block.
2	7616063	Frequency synthesizer using a phase-locked loop and single side band mixer A frequency synthesizer is built using a phase locked loop incorporating a single side band mixer either in the feedback loop or in the input. The single side band mixer is preferably realized with...
3	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...
4	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...
5	7605661	Phase locked loop circuit including digital voltage-controlled oscillator, ring oscillator and selector A PLL circuit includes a polyphase reference clock output circuit, which outputs multiple reference clocks, each clock being of different phase. The PLL circuit further includes a digital voltage...
6	7602252	Sigma delta modulator, fractional frequency synthesizer and sigma delta modulating method There is provided a sigma delta modulator that outputs an output signal obtained by performing sigma delta modulation on an input signal, including: a plurality of accumulators that are serially...
7	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...
8	7589594	Variable loop bandwidth phase locked loop An apparatus comprising a voltage controlled oscillator, a first charge pump, a second charge pump, a switch circuit and a comparator circuit. The voltage controlled oscillator may be configured to...
9	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....
10	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...
11	7573337	Code NCO and GPS receiver A code is provided which outputs a predetermined code enable signal by executing a simple control, depending on a clock signal frequency, with an optimal circuit scale. A multiplexer receives...
12	7570120	Multichannel memory-based numerically controlled oscillators A multichannel numerically controlled oscillator is provided. The multichannel numerically controlled oscillator has a dual port memory. An output function generation lookup table in the dual port...
13	7567134	System and method for synchronizing multiple oscillators A system and method for synchronizing an oscillator with multiple phases at a desired phase angle difference. A relative measure of a phase angle difference between two phases permits each phase to...
14	7567132	Synthesizer A synthesizer comprises a detector for detecting a parameter difference, a voltage controlled oscillator, at least one capacitor having one end connected to a node between the detector and the...
15	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...
16	7564314	Systems and arrangements for operating a phase locked loop Systems, methods and media for a fast locking phase locked loop (FLPLL) are disclosed. A FLPLL apparatus can include a voltage controlled oscillator (VCO) coupled to a phase frequency detector and...
17	7560996	Frequency-multiplied clock signal output circuit In a DPLL circuit, when the size of a data value which is output from a data latch circuit and should be naturally set in a 11-bit down-counter becomes equal to or more than 12 bits, an overflow...
18	7557663	Digital PLL for a system-on-chip for digital control of electronic power devices A digital phase locked loop (DPLL) comprising a digitally implemented voltage controlled oscillator (VCO) for producing a VCO feedback signal, a phase error counter which includes a digital...
19	7557661	Direct digital synthesis (DDS) hybrid phase-lock loop for low-jitter synchronization A direct digital synthesis (DDS) hybrid phase-lock loop for low-jitter synchronization provides a mechanism for generating a low-jitter clock from a timing reference that has a high jitter level. A...
20	7554414	Fast starting circuit for crystal oscillators A method for assisting the oscillating starting process of an electromechanical oscillator ( 10 ) has the following steps: detection of oscillator oscillations ( 1 b , 1 c ) which occur in the...
21	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...
22	7548130	Characteristic automatic compensating apparatus, characteristic automatic compensating method, characteristic automatic compensating program of oscillator and positioning signal receiver A characteristic automatic compensating apparatus of an oscillator includes oscillating means, temperature detecting means, characteristic determining means for measuring a drift value of an...
23	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...
24	7548119	Digitally controlled oscillator with jitter shaping capability A digitally controlled oscillator (DCO) generating an output clock includes a jitter shaping module for shifting low frequency digital jitter on the output clock into higher frequency jitter.
25	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...
26	7545222	Phase lock loop for rapid lock-in and method therefor A phase-locked loop (PLL) for rapid lock-in applicable to digital, analog, or hybrid digital-analog PLL circuits is provided. Besides the units for basic operation, including a phase-frequency...
27	7541877	Auto-adjusting high accuracy oscillator An auto-adjusting high accuracy oscillator is disclosed, which comprises: a frequency comparator, for comparing a synchronization signal obtained from a USB host with an oscillation signal obtain...
28	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...
29	7538619	Oscillator reducing clock signal variations due to variations in voltage or temperature Provided is an oscillator including a logic signal generator and a clock generator. The logic signal generator generates a first logic signal and a second logic signal that have the same period but...
30	7532077	Edge alignment for frequency synthesizers A frequency synthesizer ( 50, 70 ) including an edge-detection circuit ( 51, 60 ) for disabling elements of the frequency synthesizer ( 50, 70 ) prior to start-up. The edge-detection circuit...
31	7528664	Method of and apparatus for improving the signal-to-noise ratio for a digital conversion circuit The signal-to-noise ratio for a digital conversion circuit is improved by taking a source signal and generating N signals that are each phase-shifted relative to each other, thereby generating N...
32	7522005	K_FMfrequency tracking system using an analog correlator An apparatus providing a phase/frequency modulation system is disclosed herein. The apparatus includes a first circuit configured to introduce an offset to center a signal applied to a VCO. The...
33	7511581	Wide-band multimode frequency synthesizer and variable frequency divider A wide-band multimode frequency synthesizer using a Phase Locked Loop (PLL) is provided. The multiband frequency synthesizer includes a multimode prescaler, a phase detector/a charge pump, a...
34	7508274	PLL with phase clipping and resynchronization A phase locked loop with phase clipping and/or resynchronization is disclosed. A reference signal is compared to a feedback signal derived at least in part from an output signal of an oscillator to...
35	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...
36	7508270	Differential-to-single-ended converter and phase-locked loop circuit having the same In a differential-to-single-ended (D2S) converter having reduced power consumption and excellent duty ratio characteristics, and a phase-locked loop (PLL) circuit having the same, the D2S converter...
37	7504891	Initialization circuit for a phase-locked loop Integrated circuit including a phase-locked loop (PLL) circuit having a first mode and a second mode of operation. Operating the PLL circuit in the first mode may generate a constant frequency...
38	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...
39	7501900	Phase-locked loop bandwidth calibration A novel circuit for obtaining the bandwidth of a phase-locked loop circuit is disclosed. The circuit adjusts a phase of a signal (reference or generated), causing the phase-locked loop circuit to...
40	7498890	Continuous reversible gear shifting mechanism A novel gear shifting mechanism operative to adjust the loop gain of a phase locked loop (PLL) circuit in a continuous and reversible manner. The loop gain can be increased to widen the bandwidth...
41	7486146	Loop system capable of auto-calibrating oscillating frequency range and related method A loop system capable of auto-calibrating an oscillating frequency range includes a frequency error detector, a voltage controlled oscillator (VCO), a voltage input unit, and a switch. The...
42	7486145	Circuits and methods for implementing sub-integer-N frequency dividers using phase rotators Circuits and methods are provided for implementing programmable sub-integer N frequency dividers for use in, e.g., frequency synthesizer applications, providing glitch free outputs signals with...
43	7482885	Method of frequency synthesis for fast switching A digital frequency synthesizer can be implemented with single source design, a multiplexer design, a fractional divider design, or a frequency multiplier and frequency divider design....
44	7477112	Structure for the main oscillator of a counter-controlled delay line A counter-controlled delay line includes a main oscillator for delaying edges of an input signal to generate a main clock signal. The main oscillator includes a plurality of gated delay elements...
45	7471160	Real-time frequency band selection circuit for use with a voltage controlled oscillator An integrated circuit including a phase-locked loop (PLL) circuit responsive to a voltage controlled oscillator (VCO) frequency band selection circuit that provides automatic frequency band...
46	7463710	Fractional-N synthesizer and method of programming the output phase A fractional-N synthesizer with programmable output phase including a phase locked loop having an output signal whose frequency is a fractional multiple of an input reference signal, the phase...
47	7449960	Frequency modulation linearization system for a Fractional-N offset PLL A linearization system is provided for a Fractional-N Offset Phase Locked Loop (FN-OPLL) in a frequency or phase modulation system. In general, the linearization system processes a modulation...
48	7446614	Logical level converter and phase locked loop using the same A logical level converter generates an output signal by which a succeeding logical circuit accurately operates even if there is a threshold fluctuation factor. In the logical level converter, an...
49	7443251	Digital phase and frequency detector Disclosed are a digital phase-frequency detector and a method of operating a digital phase-frequency detector. The detector includes an input circuit, an output circuit and a reset circuit. In use,...
50	7443247	Circuit arrangement for detection of a locking condition for a phase locked loop, and a method A circuit arrangement includes a phase locked loop, having a phase detector on whose output side a phase signal can be tapped off and whose output side is coupled to a charge pump. Furthermore, the...

Matches 1 - 50 out of 1561

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