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Document Title |
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7570125 |
Crystal oscillator
An ocscillator circuit having: a) a piezoelectric crystal connected to a surface; b) a variable frequency generator for generating a driving signal which is supplied to the crystal to cause the...
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7557666 |
Oscillation circuit
An oscillation circuits includes an oscillation unit 30 for generating an internal clock signal having an amplitude of vibration corresponding to an internal power supply voltage thereof,...
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7548128 |
Systems and methods with reduced reference spurs using a crystal oscillator for broadband communications
Systems and methods are provided. In this regard, a representative system incorporates a crystal oscillator circuit and a digital automatic level control circuit. The digital automatic level...
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7545228 |
Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators
A method for generating a temperature-compensated timing signal that includes counting, within an update interval, a first number of oscillations of a first micro-electromechanical (MEMS)...
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7541878 |
Temperature compensated crystal oscillator
An apparatus, comprising: a first oscillator made from piezoelectric material to oscillate at a first frequency; a second oscillator to oscillate at a second frequency; a comparator to compare the...
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7532079 |
Digital tuning of crystal oscillators
Embodiments feature techniques and systems for digitally tuning a crystal oscillator circuit. In one aspect, embodiments feature a method for making a digitally tuned crystal oscillator circuit....
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7528682 |
Electronic apparatus having display portion and oscillator and manufacturing method of the same
In an electronic apparatus comprising a digital display portion and first and second oscillators comprising first and second oscillating circuits, each of the first and second oscillating circuits...
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7511590 |
Differential crystal oscillator
A differential crystal oscillator electronic circuit. Embodiments of the present invention include circuits comprising two substantially similar oscillator circuits. The oscillator circuits may be...
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7492231 |
Oscillator starting control circuit
An oscillator starting control circuit capable of shortening a starting time and stably controlling the starting time, and furthermore, stabilizing an oscillating frequency after starting an...
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7489209 |
High stability fast start up oscillator for implants
An oscillator for use within an implantable medical device is provided. The oscillator includes a resonator and a first switch coupled to a first resistive network. The first resistive network...
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7482889 |
Apparatus and method of temperature compensating an ovenized oscillator
An oscillator having improved frequency stability which includes an oscillator circuit and an SC-cut resonator connected with the oscillator circuit. The SC-cut resonator has a first turning point....
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7479836 |
Oscillation circuit and semiconductor device comprising that oscillation circuit
An oscillation circuit used in a semiconductor device such as a cell-based IC, and comprises: an inverting amplifier, which is constructed so that it is possible connect a crystal oscillator XL...
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7439820 |
Reducing the settling time of a crystal oscillator
A method and system for initiating the oscillation of a crystal that controls a crystal oscillator by applying an initiating pulse to said crystal. The initiating pulse having a pulse width less...
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7439819 |
Piezoelectric-oscillator
Deterioration in frequency stability with time in a conventional piezoelectric oscillator using an accumulation type MOS capacitance element is improved. A P-channel transistor type or an N-channel...
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7432772 |
Electrical oscillator circuit and an integrated circuit
An electrical oscillator circuit ( 301, 302 ) comprising: a resonator ( 303 ) comprised in the first subcircuit ( 301 ); and an active device ( 309 ) comprised in the second subcircuit ( 302 )...
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7429900 |
Oscillator and semiconductor device
An object is not only to contribute to reduction in current consumption but also to advance actuation of a system required in a camera, an on-vehicle electric component, etc. by shortening a...
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7417512 |
Dual mode tuning digitally controlled crystal oscillator and operation method thereof
A dual mode tuning digitally controlled crystal oscillator includes a crystal resonator, an oscillation circuit, a coarse mode tuning unit and a fine mode tuning unit. The crystal resonator...
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7411467 |
Overtone crystal oscillator automatic calibration system
An overtone crystal oscillator automatic calibration system including an overtone crystal oscillator with multiple programmable resistors and multiple amplifiers with supply voltage inputs and a...
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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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7398163 |
Sensing apparatus
An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree...
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7391279 |
Inverting amplifier and crystal oscillator having same
A bypass capacitance is connected to a node between first and second self-bias resistances connected in series between an input and an output of an inverter. The bypass capacitance accommodates...
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7391278 |
Oscillator with stacked amplifier
Embodiments of the invention provide a low-power, high-gain amplifier for a crystal oscillator. In some embodiments, the oscillator amplifier circuit comprises two NMOS transistors stacked in...
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7388445 |
Piezoelectric oscillator for quadrature modulation
A quartz oscillator for quadrature modulation has a quartz oscillating circuit including a transistor, a quartz oscillator, a capacitor, and a resistor, a double-mode quartz filter, a reactance...
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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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7372342 |
Oscillator
A high-performance crystal oscillator providing effective bias resistors with low power consumption and minimal substrate surface area. In various embodiments of the invention, a switched-capacitor...
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7369009 |
Oscillator device for frequency modulation
The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator ( 1 ) with automatic amplitude control ( 5, 6, 7 ) is provided....
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7369006 |
Applied voltage control circuit for voltage controlled oscillation circuit
When a power supply is turned on, an NPN transistor is disconnected, a first transmission gate is conducted, a second transmission gate is disconnected, and a power-supply voltage is applied to a...
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7369005 |
Colpitts oscillator
Oscillation in which unwanted vibration (B mode) is surely suppressed while stable oscillation by principal vibration (C mode) is obtained is obtained. In a Colpitts oscillator including a...
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7352256 |
Crystal oscillation circuit
A crystal oscillation circuit can correctly suppress the resonance of a B mode, thereby correctly excite the resonance of a C mode. Since the crystal oscillation circuit uses a quartz oscillator of...
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7332977 |
Crystal clock generator operating at third overtone of crystal's fundamental frequency
A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of...
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7327200 |
Device for operating a vibrating unit of a vibration resonator
A device for operating an oscillatable unit of a vibration resonator, including a piezodrive, which is connected with the oscillatable unit, and feedback electronics. The feedback electronics...
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7321272 |
Device for detecting the temperature of an oscillator crystal
In a device for detecting the temperature of an oscillator crystal 2 , arranged on a carrier, in particular in a mobile radio apparatus, the detected temperature should be as exact as possible a...
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7292117 |
Temperature-compensated piezoelectric oscillator
A temperature compensated piezoelectric oscillator includes: an oscillation circuit that drives a piezoelectric element with a current; a direct-current-stopping fixed capacitor; a...
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7292114 |
Low-noise high-stability crystal oscillator
Circuits, methods, and apparatus that provide low-noise, high-stability crystal oscillators having controlled-amplitude differential output signals and DC level control. A crystal oscillator...
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7283006 |
Voltage-controlled oscillator
An oscillator circuit configured by a feedback resistance 1 , an amplifier 2 and a quartz vibrator 3 has a load resistance. MOS transistors 5, 6 short-circuited at source and drain terminals...
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7279998 |
Voltage-controlled oscillator
With a variable capacitor including a load capacitor of an oscillation circuit having a feedback resistor 1 , an inverter 2 , and a crystal oscillator 3 , and a static capacitance generated...
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7271671 |
Arranging a crystal to generate an oscillating signal
A crystal is loaded with capacitance in such a way that it begins to oscillate at a desired frequency with a resonance circuit ( 2 ). Capacitive voltage division is carried out with a voltage...
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7262671 |
Amplitude level control circuit
Amplitude level control circuit for an oscillator comprising first means arranged to generate a first current for driving the oscillator; and second means arranged to generate a second current such...
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7248128 |
Reference oscillator frequency stabilization
Method for stabilizing the frequency of a MEMS (Micro Electro Mechanical Systems) reference oscillator, and a MEMS reference oscillator, wherein the method comprises following steps: using two or...
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7248127 |
Crystal oscillator
A quartz crystal oscillator in which phase noise is reduced includes: a resonance circuit having a quartz crystal unit and a split capacitor connected to the crystal unit; a transistor for...
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7239211 |
Temperature-compensated crystal oscillator
A temperature-compensated quartz crystal oscillator includes a substrate having a circuit pattern disposed on a surface thereof and mounting electrodes disposed on a reverse side thereof and...
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7230502 |
Emitter coupled logic oscillator circuit
In a piezoelectric oscillator a non-inverted output terminal ( 3 ) of an ECL circuit ( 10 ) is grounded via a capacitor (C 3 ) and is connected to a non-inverting input terminal ( 5 ) of the ECL...
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7230501 |
Oscillation circuit and electronic equipment
An oscillation circuit comprises a SAW resonator having a pair of reflectors disposed on a piezoelectric substrate and a pair of IDTs which are set up in parallel between the pair of reflectors and...
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7227421 |
Crystal oscillator circuit
An object of the invention is to provide an oscillator circuit employing an ECL to prevent variation in oscillation frequency and oscillation gain, and to simplify design. The construction is such...
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7221233 |
Nonvolatile programmable crystal oscillator circuit
According to embodiments of the invention, a nonvolatile memory such as a flash memory is used to configure a single die after packaging of the die has occurred. Thus, numerous applications may be...
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7221232 |
Parallel arrangement for saw oscillator components
A SAW oscillator is provided that can prevent an increased parasitic capacitance or an increased parasitic inductance even in the high frequency range. The SAW oscillator includes a semiconductor...
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7205858 |
Temperature compensated piezoelectric oscillator and electronic apparatus comprising it
A temperature-compensated piezoelectric oscillator includes an AT-cut quartz crystal resonator, an amplifying circuit connected to one end of the quartz crystal resonator, a varactor diode...
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7205856 |
Piezoelectric oscillator
A piezoelectric oscillator including a piezoelectric vibrator that vibrate at desired frequency; a first transistor for exciting the piezoelectric vibrator; a second transistor whose collector...
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7199674 |
Low phase noise, wide tune range saw oscillators and methods of operating the same
A two port, single pole SAW resonator is employed for a local oscillator to eliminate the secondary frequency responses of the prior art without adding additional inductances and capacitances...
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7190238 |
Surface mounting crystal oscillator
The present invention relates to a surface mounting crystal oscillator in which an IC chip, a crystal element, and a circuit component are connected together by wire bonding and are housed within a...
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