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Document Title |
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7629858 |
Time delay oscillator for integrated circuits
One aspect relates to an oscillator, and various oscillator embodiments comprise an amplifier and line driver with an input and an output and a transmission line with a predetermined transmission...
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7486151 |
Semiconductor circuit for use in timer circuit or oscillator circuit
In a timer circuit of a semiconductor circuit including a current source driven by a power supply voltage, the current source outputs a current dependent on the power supply voltage, and outputs a...
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7474162 |
RC-oscillator circuit
An RC oscillator circuit is disclosed. The RC oscillator circuit includes a current generator configured to generate a charge current. The RC oscillator circuit also includes an integrator having...
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7414482 |
Resonance mode selection using a resonator-synchronized second-order oscillator
A resonator-synchronized oscillator for resonance mode selection is disclosed. In one embodiment, the resonator-synchronized oscillator comprises an oscillation loop, at least one capacitor...
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7411466 |
Coil-less overtone crystal oscillator
An overtone crystal oscillator including a crystal, multiple amplifiers and an RC network. The crystal has a fundamental resonance frequency and at least one overtone resonance frequency. The...
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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...
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7391840 |
Phase locked loop circuit, electronic device including a phase locked loop circuit and method for generating a periodic signal
A phase locked loop (PLL) circuit ( 1 ) comprising a loop input (11); a phase detector section ( 2 ) for detecting a phase difference between an input signal and a reference signal. The phase...
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7375600 |
Integrated quartz oscillator circuit
An integrated quartz oscillator circuit is disclosed having a capacitive voltage divider, which has a first capacitor and a second capacitor, as well as having a first transconductance amplifier,...
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7356719 |
Microcomputer
In an EEPROM of a microcomputer, data is stored for determining a communication rate CMR for fixing the data transmission time of one frame managed by a communication circuit on the basis of an...
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7339442 |
Baseband RC filter pole and on-chip current tracking system
An apparatus and method are provided for tracking the poles of an integrated RC filter as well as the absolute value of a current source. A single tracking oscillator contains integrated elements...
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7336135 |
Oscillator and semiconductor device
An oscillator for ensuring the phase relationship between two resonant circuits coupled by a coupling circuit. A first resonant circuit outputs two signals having different phases, and a second...
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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...
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7295081 |
Time delay oscillator for integrated circuits
One aspect relates to an oscillator, and various oscillator embodiments comprise an amplifier and line driver with an input and an output and a transmission line with a predetermined transmission...
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7286022 |
Resistor-capacitor (RC) oscillator insensitive to process, voltage, and temperature variances
There is provided a resistor-capacitor (RC) oscillator circuit insensitive to process, voltage, and temperature variances. The RC oscillator circuit includes a delay unit, a resistor unit, a...
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7271670 |
CR oscillation circuit
A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The...
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7205857 |
Oscillator with quadrature output in a cross-coupled configuration
An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or...
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7202753 |
Oscillation circuit and radio communication device using the same
An power divider and a surface acoustic wave resonator are provided to a feedback path of an amplifier for oscillation. The surface acoustic wave resonator connects an input side of the amplifier...
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7199676 |
Frequency adjustment circuit
A frequency adjustment circuit that maintains a target frequency even when frequency adjustment data of zapping circuit is changed by an external noise is offered. The frequency adjustment circuit...
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7170357 |
Crystal oscillator with wide tuning range
A crystal oscillator having a crystal filter with multiple crystals in a ladder configuration, resonant at a desired operating frequency. An oscillatory signal loop feedback path includes a voltage...
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7161439 |
Oscillator delay stage with active inductor
According to some embodiments, a circuit includes a ring oscillator delay stage. The delay stage may include a first transistor, a second transistor, and an active inductor. A gate of the first...
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7157982 |
Wien-Robinson oscillator with stabilized output voltage
In a Wien-Robinson oscillator, a negative feedback path and a positive feedback path are arranged between the output of an operational amplifier and a reference ground potential. The negative...
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7151415 |
Injection locked dual opto-electronic oscillator
An injection locked dual opto-electronic oscillator having a master oscillator which generates a high Q RF output signal with a plurality of harmonic signals within a predetermined pass band. A...
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7146140 |
Quadrature oscillator and methods thereof
Briefly, exemplary embodiments of the invention may provide devices and methods to provide precise and/or low phase-noise quadrature oscillation signals. A quadrature oscillator in accordance with...
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7129798 |
Oscillator circuit having stable frequency
An oscillator includes first, second and third inverters ( 1, 2, 3 ) connected in series. A feedback path is connected from the output terminal of the third inverter ( 3 ) to the input terminal of...
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7053723 |
Oscillators with active higher-in-order phase shift filtering
The present invention proposes a new way of improving the phase stability and frequency selectivity of a phase shift oscillator ( 100 ). By introducing a filter-order enhancing feedback loop ( 124...
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7046097 |
Highly stable integrated time reference
An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of...
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7046096 |
Oscillator circuit, oscillator circuit adjusting method, and mass measuring apparatus using oscillator circuit
An oscillator circuit is a closed loop including an amplifying circuit and a feedback circuit. The amplifying circuit includes a pair of amplifiers, which also function as impedance buffers, and a...
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6987423 |
Two port voltage controlled oscillator for use in wireless personal area network synthesizers
A voltage controlled oscillator (VCO) for use in a personal area network synthesizer includes a delay cell ( 100 ), a first current amplifier ( 201, 203 ) for amplifying an input current, a...
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6980061 |
Voltage-controlled oscillator
The problem of interference and coupling between circuits that arises in reducing the size of a voltage-controlled oscillator by using low temperature co-fired ceramics (LTCC) substrate technology...
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6963252 |
Controllable oscillator with amplitude stabilization
Controllable oscillator circuit comprising a regenerative loop which incorporates a cascade circuit of first and second sections each having a controllable gain and a phase shift which is 90° at...
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6909335 |
Oscillator for DC—DC converter
An oscillator for a DC-DC converter, which is able to obtain constant frequency by using trans-conductance value as a clock of the DC-DC converter to make an output insensitive for process changes,...
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6900701 |
Automatic detection, selection and configuration of clock oscillator circuitry
Oscillator circuitry on an integrated circuit automatically detects the presence or absence of an external resistor which is used to bias and set the frequency of an internal resistor-capacitor...
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6894574 |
CR oscillation circuit
A CR oscillation circuit includes an oscillation unit having first through third invertion circuits connected in series between a first node and a second node, a capacitance element provided...
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6882234 |
Frequency adjustable oscillator and methods of operation
An oscillator ( 100, 200 ) and a method of adjusting the frequency of oscillation of the oscillator ( 100, 200 ) are disclosed for generating a signal with an adjustable frequency in a frequency...
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6825735 |
Power supply voltage and temperature-independent RC oscillator using controllable Schmitt trigger
A power supply voltage-independent and temperature-independent RC oscillator using a controllable Schmitt trigger comprises a transition voltage generator circuit, a Schmitt trigger circuit, an RC...
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6822522 |
Method and apparatus for an improved nonlinear oscillator
A nonlinear oscillator method and apparatus. According to one embodiment, a nonlinear oscillator is closed. The nonlinear oscillator includes a first linear amplifier, a second linear amplifier and...
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6803833 |
Fast start-up oscillator
A fast start up oscillator. The fast start-up oscillator includes a power-on-reset detect circuit, a bandgap circuit, a voltage detect circuit, a RC-oscillator, and a count two circuit. The fast...
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6791423 |
Quadrature coupled controllable oscillator and communication arrangement
A quadrature coupled controlled oscillator comprising a first and a second circuit module, each of the circuit modules ( 100 and 100′ ) comprising an astable multivibrator circuit ( 103 ). The...
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6774644 |
Method and circuit for compensating MOSFET capacitance variations in integrated circuits
A method for tracking the MOS oxide thickness by the native threshold voltage of a “native” MOS transistor without channel implantation for the purpose of compensating MOS capacitance...
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6744325 |
Quadrature ring oscillator
A quadrature ring oscillator for high clock-rate applications is disclosed. A quadrature LC ring oscillator may use two stages of LC oscillators and variable mixers to provide consistent...
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6727767 |
Voltage controlled oscillator with two layered mounting structure
A voltage controlled oscillator is provided. The oscillator includes a surface acoustic wave element for forming a feedback circuit for an amplifier, and a phase adjustment circuit including a...
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6686806 |
Ring VCO based on RC timing
The present invention, generally speaking, provides a controlled oscillator that attains the foregoing objectives. The structure of the oscillator is, in general, that of a ring; however, timing of...
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6657502 |
Multiphase voltage controlled oscillator
A multiphase voltage controlled oscillator (e.g., a quadrature VCO) 100, which includes multiple voltage controllable transconductance phase drivers 102, 104, 106 and 108. The output of each...
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6603293 |
Power supply rejection ratio optimization during test
A regulated voltage supply circuit having improved power supply rejection ratio is achieved. The circuit comprises, first, a voltage follower having an input, an output, and a power supply voltage....
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6603366 |
Trimmable oscillator
The present invention relates to a trimmable oscillator circuit which comprises a comparator circuit operable to compare an output voltage of the oscillator circuit to a reference voltage and...
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6590464 |
Resistor-capacitor oscillator circuit
A resistor-capacitor oscillator for receiving a current source, comprising a first switch path and a second switch path that are symmetric and connected in parallel. The first switch path comprises...
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6535071 |
CMOS voltage controlled phase shift oscillator
Structures and methods for CMOS voltage controlled phase shift oscillators are provided. The CMOS voltage controlled phase shift oscillators, or phase shift circuit, includes any odd number of...
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6462626 |
Quadrature output oscillator device
A quadrature output oscillator device ( 22 ) includes a first voltage controlled oscillator ( 40 ) and a second voltage controlled oscillator (44). The second voltage controlled oscillator ( 44 )...
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6459342 |
System and method for controlling an oscillator
An oscillator controls the frequency of an output clock signal in response to detecting an error in the frequency of an input clock signal. The oscillator includes an inverter operable to generate...
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6456167 |
Quadrature oscillator
A quadrature oscillator for generating quadrature and differential double-frequency signals is disclosed. This oscillator is formed by PMOS and NMOS transistors, complementary devices, etc. The...
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