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9024694 Voltage controlled oscillator with a large frequency range and a low gain  
A system is disclosed for a voltage controlled oscillator (“VCO”) having a large frequency range and a low gain. Passive or active circuitry is introduced between at least one VCO cell in the...
9024692 Voltage controlled oscillator band-select fast searching using predictive searching  
A method, an apparatus, and a computer program product are provided. The apparatus tunes a frequency provided by a VCO. The apparatus determines a relative capacitance change associated with a...
9025965 Digital phase locked loop having insensitive jitter characteristic for operating circumstances  
Disclosed are a phase locked loop (PLL) of a digital scheme and a method thereof. More specifically, disclosed are a digital phase locked loop having a time-to-digital converter (TDC), a digital...
9019017 Digitally controlled oscillator and digital PLL including the same  
A digitally controlled oscillator has a high-order ΔΣ modulator configured to be of at least an order higher than a first order and configured to input a digital control signal and output a...
9019016 Accumulator-type fractional N-PLL synthesizer and control method thereof  
There are provided an accumulator-type fractional N-PLL synthesizer for suppressing the fractional spurious caused by periodically switching a frequency division number of a fractional frequency...
9007139 Oscillation frequency adjusting circuit  
According to one embodiment, a first oscillator has an oscillation frequency that is changed depending on a temperature. A second oscillator has different temperature characteristics from the...
8994460 Implementing compact current mode logic (CML) inductor capacitor (LC) voltage controlled oscillator (VCO) for high-speed data communications  
A method and a phase locked loop (PLL) circuit for implementing compact current mode logic inductor capacitor voltage controlled oscillator for high speed communications, and a design structure on...
8988134 System and method for operating low power circuits at high temperatures  
A system includes first circuitry including first elements for operating in a low power mode; second circuitry including second elements for operating in a high-temperature mode; and one or more...
8964880 Reduction in power supply induced jitter on a SerDes transmitter  
In an embodiment of the invention, a frequency divider in a phase-locked loop (PLL) circuit is provided power from the power supply that provides power to a transmission circuit. The PLL is...
8963750 Time-to-digital conversion with analog dithering  
There is described a time-to-digital conversion scheme using an arrangement of delay elements based Time-to-Digital Converter, TDC (20), wherein dithering is built in the digital domain and...
8952759 Circuit and method for controlling mixed mode controlled oscillator and CDR circuit using the same  
A circuit for controlling a mixed mode controlled oscillator. The circuit comprises a charge pump, and a digital loop filter. The charge pump is coupled to the mixed mode controlled oscillator....
8928416 Transceiver, voltage control oscillator thereof and control method thereof  
A transceiver includes a phase lock loop (PLL) and a clock data recovery circuit (CDR). The phase lock loop generates a first level control signal. The clock data recovery circuit, coupled to the...
8912857 PLL system and method for controlling a gain of a VCO circuit  
A phase locked loop system, comprises: a voltage controlled oscillator circuit, comprising a first plurality of switchable varactors for selecting a frequency band of the VCO, that has a gain that...
8907731 Self-resonant circuit  
A digitally-controlled oscillator circuit receives a digital value and generates a driving signal for driving an oscillator at a frequency according to the received digital value. A...
8896384 Phase locked loop including a frequency change module  
A phase locked loop (PLL) includes a detector, a charge pump, a loop filter, a voltage controlled oscillator (VCO), a divider, and a frequency change module. The detector provides a phase...
8890635 Signal generator for a transmitter or a receiver, a transmitter and a receiver  
A signal generator for a transmitter or a receiver for transmitting or receiving RF-signals according to a given communication protocol includes an oscillator and a mismatch compensator. The...
8892060 Method for tuning a digital compensation filter within a transmitter, and associated digital compensation filter  
A method for tuning a digital compensation filter within a transmitter includes: obtaining at least one resistance-capacitance (RC) detection result, wherein the digital compensation filter...
8890626 Divider-less phase locked loop (PLL)  
One or more techniques and systems for a divider-less phase locked loop (PLL) and associated phase detector (PD) are provided herein. In some embodiments, a pulse phase detector (pulsePD) signal,...
8890625 Systems and methods for frequency synthesis to improve coexistence  
A frequency synthesizer for a WLAN transceiver is disclosed that may be used to generate 5.4 GHz and 2.4 GHz signals. The frequency synthesizer may be configured to minimize VCO pulling by using...
8884709 Double-point modulator with accurate and fast gain calibration  
A phase-locked loop double-point modulator may include a frequency divider having a ratio which can be changed by a first modulation signal, and an oscillator, a frequency of which can be changed...
8884710 Gyroscope with phase and duty-cycle locked loop  
A system and method in accordance with the present invention provides a gyroscope incorporating an improved PLL technique. The improved PLL auto-corrects its own reference low-frequency noise,...
8884705 Frequency synthesis device with feedback loop  
A frequency synthesis device with a feedback loop includes: a phase-comparison control circuit; a frequency conversion unit voltage controlled by the control circuit; a feedback loop for supplying...
8866556 Phase shift phase locked loop  
A phase shift phase locked loop (PSPLL) are described. The phase shift PLL includes a PLL and a phase adjusting circuit coupled to the inputs of the PLL. The phase adjusting circuit has a first...
8860511 Frequency divider and PLL circuit  
A frequency divider of an injection locked type capable of division by 2, division by 4, and further division by 8 with a simpler configuration is disclosed and the frequency divider includes a...
8847690 System and method for built in self test for timing module holdover  
Aspects of the embodiments include a method for synchronizing a device having an oscillator to a reference signal. A correction signal can be determined based on the reference signal. A...
8841973 Circuit arrangement for generation of radio frequency output signals which form a broadband frequency ramp  
A circuit arrangement for generation of radio frequency output signals which form a broadband frequency ramp, with a reference oscillator, a phase detector, a loop filter, a VC oscillator for...
8836434 Method and system for calibrating a frequency synthesizer  
A digital frequency synthesizer with an automatic calibration system. The digital frequency synthesizer is calibrated by initiating a coarse tuning operation to rapidly reach a preliminary...
8838033 System and method for signal amplification  
Methods and systems for processing a signal with a corresponding noise profile are disclosed. Aspects of the method may comprise analyzing spectral content of the noise profile. At least one noise...
8830001 Low power all digital PLL architecture  
A new all digital PLL (ADPLL) circuit and architecture and the corresponding method of implementation are provided. The ADPLL processes an integer and a fractional part of the phase signal...
8816776 Loss of lock detector for clock and data recovery system  
An apparatus comprises a clock and data recovery system, and a loss of lock detector at least partially incorporated within or otherwise associated with the clock and data recovery system. The...
8816732 Capactive load PLL with calibration loop  
A circuit includes a capacitive-load voltage controlled oscillator having an input configured to receive a first input signal and an output configured to output an oscillating output signal. A...
8810320 Phase-locked loop runaway detector  
In a circuit having a runaway detector coupled to a phase-locked loop (PLL), the PLL may include a loop filter to receive a control voltage within the PLL and provide a filtered control voltage...
8810321 Oscillator auto-trimming method and semiconductor device using the method  
An oscillator auto-trimming method is provided. The oscillator auto-trimming method includes receiving, by a subtractor, a first count result and second count result to output a difference between...
8803627 Wideband direct DCO modulator with in-band compensation  
A Direct VCO (DCO) modulation apparatus and method that provides a wideband modulated signal output. The wideband response is obtained via signal processing to counteract a high-pass frequency...
8791763 Tunable injection locked dividers with enhanced locking range  
Tunable injection locked (IL) dividers having enhanced locking range, good phase noise performance, and low power consumption are disclosed. In an exemplary design, an apparatus (e.g., a wireless...
8787423 Agile frequency synthesizer scheme for fast-hopping, low phase noise applications  
A system and method for frequency hopping precalibrates a subset of a plurality of channels, storing the channels' associated curves in a computer readable medium. Before hopping to a new channel,...
8766729 Apparatus, and associated method, for forming a synthesized oscillating signal  
An apparatus, and an associated method, for synthesizing a discrete-valued oscillating signal. Input parameters are provided that are determinative of the frequency, gain, and phase...
8761688 Radio frequency circuit and signal transmission method  
A radio frequency circuit and a signal transmission method are provided. The radio frequency circuit comprises a primary antenna, a secondary antenna and a radio frequency integrated circuit. The...
8754714 Signal pattern and dispersion tolerant statistical reference oscillator  
Disclosed is a statistical reference oscillator that includes: a stochastic reference clock generator which receives an input data outputs a reference signal obtained by dividing the received...
8749318 Enhanced polar modulator for transmitter  
Enhanced polar modulator for transmitter. Within a phase locked loop (PLL), two point modulation topology is employed in which phase information passes through a limiter (e.g., a ±90° or ±π/2),...
8750448 Frequency calibration apparatus of frequency synthesizer and frequency calibration method thereof  
A frequency calibration apparatus and method are provided. A frequency calibration method includes determining a frequency band according to results of frequency comparisons between a synchronized...
8742862 Current reuse voltage controlled oscillator with improved differential output  
A current reuse voltage controlled oscillator with improved differential output is disclosed. In an exemplary embodiment, an apparatus includes a PMOS transistor and an NMOS transistor coupled...
8742864 Method and digital circuit for generating a waveform from stored digital values  
In a particular embodiment, a method includes adjusting an input to a divider on a feedback path of a phase locked loop circuit based on a stored digital value representing a portion of a...
8736385 Ring oscillator based voltage control oscillator having low-jitter and wide bandwidth  
The embodiments described herein provide a voltage controlled oscillator (VCO). The VCO may include, but is not limited to a voltage-to-current converter configured to receive a control voltage...
8736384 Delay line calibration  
In some embodiments, provided are calibration techniques for measuring mismatches between TDL delay stage elements, and in some cases, then compensating for the mismatches to minimize performance...
8729976 Methods and apparatus for calibration and temperature compensation of oscillators having mechanical resonators  
Methods and apparatus for calibration and temperature compensation of oscillators having mechanical resonators are described. The method(s) may involve measuring the frequency of the oscillator at...
8723607 Phase locked loop  
A phase locked loop comprising: an oscillator for generating an output signal of a frequency that is dependent on an input to the oscillator; sampling means for generating a sequence of digital...
8724765 Locking system and method thereof  
The present invention provides a locking method and system, and the method includes: a locking system performing a phase discrimination and conversion process to an input signal Fi of an external...
8718563 System and method for signal limiting  
A method for processing a signal with a corresponding noise profile includes analyzing spectral content of the noise profile, filtering at least one noise harmonic within the signal based on the...
8704602 Two-point modulation device using voltage controlled oscillator, and calibration method  
A modulation section including a feedback circuit configured to conduct feedback control of an output signal from a voltage controlled oscillator based on an inputted modulation signal, and a...