|
Match
|
Document |
Document Title |
|
|
7622960 |
Metastable-resistant phase comparing circuit
A phase comparing circuit includes a first storage circuit for reading an external clock signal based on a control clock signal; first and second inverters for inverting a signal from the first...
|
|
|
7622959 |
Phase comparator and semiconductor device with phase comparator
It is an object of the present invention to improve the phase difference detection accuracy of a phase comparator. A phase difference signal generation circuit outputs a signal C_SIGNAL which takes...
|
|
|
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...
|
|
|
7613974 |
Fault detection method and apparatus
This invention relates to fault detection in electrical circuits. The invention provides a method and apparatus for testing an input circuit by generating a periodic test signal having a...
|
|
|
7609102 |
Pattern-dependent phase detector for clock recovery
A phase detector apparatus and method used for clock recovery from a data signal is provided. The phase detector provides phase correction signals to a clock signal generator, where the phase...
|
|
|
7609092 |
Automatic phase-detection circuit for clocks with known ratios
An automatic phase detection circuit for generating an internal synchronization signal when two clock input signals achieve a certain phase relationship. No external reference signal is required....
|
|
|
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...
|
|
|
7598775 |
Phase and frequency detector with zero static phase error
A method and circuit for phase and frequency detection having zero static phase error for use in a phase-locked loop system is presented. The phase and frequency detector utilizes a first phase and...
|
|
|
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...
|
|
|
7592847 |
Phase frequency detector and phase-locked loop
A phase frequency detector with two different delays is disclosed herein. The phase detector comprises a first D flip-flop, a second D flip-flop, a first delay unit and a second delay unit. The...
|
|
|
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...
|
|
|
7535273 |
Phase-locked loop circuit, delay locked loop circuit, timing generator, semiconductor test instrument, and semiconductor integrated circuit
A PLL and DLL are designed such that the power consumption can be reduced, the size can be easily reduced, the band of the locked loop can be a higher one, and the reliability can be improved....
|
|
|
7532039 |
Clock signal detector
A clock signal detector is provided. The device comprises a plurality of signal delayers and a plurality of flip-flops for comparing the offset range of the clock signal between two different...
|
|
|
7532038 |
Phase detecting circuit having adjustable gain curve and method thereof
A phase detecting circuit having an adjustable gain curve includes a plurality of phase detectors and a logic circuit. The phase detectors detect phase differences between a data signal and a...
|
|
|
7508239 |
Pattern sequence and state transition triggers
A pattern sequence and state transition trigger generator provides a trigger when a specified transition from one pattern/state to another pattern/state occurs in a set of input signals. Decoders...
|
|
|
7501861 |
Phase-difference detecting apparatus and method
A phase-difference detecting method is for detecting phase difference between a first signal and a second signal of the same frequency. First, generate a detection signal. Next, sample the...
|
|
|
7482841 |
Differential bang-bang phase detector (BBPD) with latency reduction
Bang-bang phase detection (BBPD) methods and circuits are presented for providing low latency, low jitter phase detection for use in high data-rate applications. A shortened data-path...
|
|
|
7482842 |
Radiation hardened phase frequency detector for implementing enhanced radiation immunity performance
A radiation hardened phase frequency detector (PFD) is provided for implementing enhanced radiation immunity performance. The radiation hardened phase frequency detector (PFD) includes a plurality...
|
|
|
7463099 |
Phase detector for reducing noise
The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a...
|
|
|
7463069 |
Phase detector with selection of differences between input signals
Known phase detectors have feedbackloops and do not function properly under severe conditions. By providing said phase detectors with difference establishers ( 1 ) for establishing differences...
|
|
|
7456661 |
Phase-locked/frequency-locked loop and phase/frequency comparator therefor
A phase/frequency comparator is described which includes two edge-triggered storage elements, each set by an edge of a reference frequency signal of a phase—or frequency-locked loop (PLL) and by...
|
|
|
7449962 |
Phase-controlled current source for phase-locked loop
A phase-controlled current source for phase-locked loop is provided. The phase-locked loop includes a voltage-controlled oscillator to associate a charging path or discharging path in order to...
|
|
|
7443206 |
High-frequency linear phase-frequency detector with wide-pulse outputs
A circuit and method are provided for detecting a phase difference between at least two periodic signals. The circuit and method disclosed herein provide pulsed output signals with wide output...
|
|
|
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,...
|
|
|
7425851 |
Phase-locked loop with incremental phase detectors and a converter for combining a logical operation with a digital to analog conversion
The invention relates to a phase-locked loop comprising a voltage controlled oscillator and having a frequency control input for controlling the frequency of the output signal. The phase-locked...
|
|
|
7423456 |
Fast response time, low power phase detector circuits, devices and systems incorporating the same, and associated methods
A circuit for quickly accomplishing highly accurate phase detection using low power is described. The circuit includes a phase decision circuit that receives two clock signals and detects the phase...
|
|
|
7417470 |
Phase frequency detector with a novel D flip flop
Methods, systems and components for use with or as a phase frequency detector. The phase frequency detector stretches its output pulse, allowing the detector to operate in a more linear region. As...
|
|
|
7414446 |
DLL circuit of semiconductor memory apparatus and method of delaying and locking clock in semiconductor memory apparatus
A DLL circuit of a semiconductor memory apparatus includes a frequency sensing unit that generates and outputs a high frequency signal and a low frequency signal on the basis of a CAS latency...
|
|
|
7400204 |
Linear phase detector and charge pump
A phase detector detects a phase difference between a first and second signal received by a phase detector. A charge is supplied by a charge pump circuit that corresponds to the phase difference...
|
|
|
7388408 |
Phase-frequency detector capable of reducing dead zone
A phase-frequency detector generates output signals at a first and a second output end based on input signals received at a first and a second input end. The phase-frequency detector includes two...
|
|
|
7382163 |
Phase frequency detector used in digital PLL system
A phase frequency detector includes a phase error detector outputting a phase error signal according to a first input signal and a second input signal; a phase error judgment unit outputting a...
|
|
|
7375557 |
Phase-locked loop and method thereof and a phase-frequency detector and method thereof
The phase-frequency detector may include a first flip-flop configured to generate a first signal, the first signal transitioning to a first logic level in response to a first edge of a first input...
|
|
|
7336106 |
Phase detector and method having hysteresis characteristics
A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the...
|
|
|
7332973 |
Circuit and method for digital phase-frequency error detection
A time-to-digital converter comprises a ring oscillator, a counter, an encoder, and a multi-bit latch. The ring oscillator comprises a first input and a clock input, as well as, a first output...
|
|
|
7285994 |
Rotational frequency detector system
A rotational frequency detector system including a rotational frequency detector responsive to a data signal and a clock signal. The rotational frequency detector is configured to compare the...
|
|
|
7282962 |
Inverted-phase detector
An inverted-phase detector is implemented in a system including a first clock circuit that provides a first clock signal and a delayed clock circuit that outputs an delayed clock signal. A...
|
|
|
7279938 |
Delay chain integrated circuits having binary-weighted delay chain units with built-in phase comparators therein
Delay-locked loop integrated circuits include a delay chain having a plurality of delay chain units. The delay chain may be a binary-weighted delay chain and the delay chain units may be arranged...
|
|
|
7271622 |
Quadrature voltage controlled oscillators with phase shift detector
In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of...
|
|
|
7271621 |
Method and apparatus for trimming a phase detector in a delay-locked-loop
Methods and apparatus are provided for trimming a phase detector in a delay-locked-loop. A latch that evaluates a phase offset between two signals is trimmed by applying two signals to the latch...
|
|
|
7227386 |
Phase locked loop lock-detection circuit
An improved clock lock detection circuit is disclosed. The circuit has a first input indicating an edge of a first clock and a second input indicating a corresponding edge of a second clock wherein...
|
|
|
7212051 |
Control signal generation for a low jitter switched-capacitor frequency synthesizer
A phase detector and control signal generator responds to a reference signal and a feedback signal to produce a non-delayed up and down signal. A programmable delay unit delays the non-delayed up...
|
|
|
7205851 |
Semiconductor integrated circuit having a clock generation circuit
During a period of preparation for actual operation, a reference clock is supplied to both a comparison clock input portion and a feedback clock input portion of a phase comparator while a feedback...
|
|
|
7202707 |
High frequency binary phase detector
A phase detector includes a first flip flop having a data input coupled to a first clock signal at a first frequency and a clock input coupled to a second clock signal at a second frequency. The...
|
|
|
7154304 |
Enhanced phase and frequency detector that improves performance in the presence of a failing clock
A system and method of reducing the pulse width differential in a phase frequency detector (PFD) is provided. In a first embodiment, a PFD is construed using a plurality of flip-flops (or clocking...
|
|
|
7142025 |
Phase difference detector, particularly for a PLL circuit
A phase difference detector adapted to generating a signal indicative of a phase difference between a first signal and a second signal, comprising: a first bistable element clocked by the first...
|
|
|
7129757 |
Clock frequency detect with programmable jitter tolerance
An apparatus and method is disclosed for programmable determination of frequency, phase, and jitter relationship of a first clock and a second clock in an electronic system. In a first,...
|
|
|
7129794 |
Phase detector for reducing noise
The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a...
|
|
|
7123055 |
Impedance-matched output driver circuits having coarse and fine tuning control
Impedance-matched output driver circuits include a first totem pole driver stage and a second totem pole driver stage. The first totem pole driver stage includes at least one PMOS pull-up...
|
|
|
7119583 |
Phase detector and method having hysteresis characteristics
A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the...
|
|
|
7109760 |
Delay-locked loop (DLL) integrated circuits that support efficient phase locking of clock signals having non-unity duty cycles
Delay-locked loop (DLL) integrated circuits include digital phase comparators that are unaffected by variable duty cycle ratios. These phase comparators determine a shortest direction to phase lock...
|