|
Match
|
Document |
Document Title |
|
|
6259333 |
Temperature compensation quartz oscillator
A system that provides an accurate frequency generating source, avoids mode coupling of the quartz vibrator, and has a high production efficiency. A high frequency amplifying circuit uses a bridge...
|
|
|
6259329 |
Reference-frequency-signal switching circuit
A reference-frequency-signal switching circuit includes an internal reference-frequency-signal oscillator for generating an internal reference-frequency signal, a reference-frequency-signal input...
|
|
|
6236282 |
Crystal reference and oscillator circuit using same
A crystal reference (100) comprises a crystal element (102) integrally housed with a memory device (108), and is coupled to the memory device through an anti-resonant network (110). The network is...
|
|
|
6225872 |
Resonator having a selection circuit for selecting a resonance mode
A resonator includes a resonating device and a selection circuit for selecting a resonance mode. The selection circuit is formed by a first-order oscillator which is provided with a synchronization...
|
|
|
6191659 |
Integrated oscillator with reduced jitter
An oscillator in an integrated circuit in which the oscillator signal is taken from the output of a comparator, and the decision level of the comparator is determined by the voltage difference...
|
|
|
6181214 |
Voltage tolerant oscillator input cell
An integrated circuit oscillator input cell has an oscillator input pad, an oscillator feedback pad, a core terminal, an inverter and an electrostatic discharge protection circuit. The inverter has...
|
|
|
6172575 |
Oscillation circuit and method of obtaining an oscillation signal
An oscillation circuit includes an oscillation terminal, and an inverter which is coupled to the oscillation terminal and which outputs an oscillation signal according to a resonant frequency of a...
|
|
|
6172576 |
Capacitor array unit connected to oscillation circuit with a piezoelectric reasonator, capacitor array unit controller oscillation frequency adjusting system and oscillation frequency adjusting method
A voltage-controlled piezoelectric resonator may be implemented without requiring the use of a trimmer capacitor by virtue of the use of a capacitor array with or without an additional capacitor...
|
|
|
6172574 |
Quartz crystal oscillator frequency modulation circuit
The present invention relates to a voltage-controlled quartz crystal oscillator, including an oscillation transistor, the base of which is connected to a first terminal of a quartz crystal and the...
|
|
|
6169460 |
Oscillator mode suppression circuit
An oscillator circuit suppresses unwanted oscillation frequencies and allows oscillation in the selected frequency band. The circuit has less sensitivity to aging of components that cause a shift...
|
|
|
6169459 |
Active-bridge oscillator
An active bridge oscillator is formed from a differential amplifier where positive feedback is a function of the impedance of one of the gain elements and a relatively low value common emitter...
|
|
|
6150894 |
Oscillator having minimum frequency and amplitude fluctuation due to temperature variation
An oscillator circuit, whose output signal has minimum fluctuation with changes in temperature, has an amplifier. Within the amplifier, a compensation resistor is connected to compensate for...
|
|
|
6133801 |
Crystal oscillation circuit
A crystal oscillation circuit includes a main oscillation circuit, an auxiliary oscillation circuit, and a control circuit. The main oscillation circuit has a crystal resonator. The auxiliary...
|
|
|
6111473 |
Integrated circuit comprising an oscillator
An integrated circuit (IC) comprising an oscillator (OSC) has a first amplifier (AMP 1 ) and a second amplifier (AMP 2 ). The first and the second amplifier (AMP 1 , AMP 2 ) each have a...
|
|
|
6091307 |
Rapid turn-on, controlled amplitude crystal oscillator
A crystal tank circuit is connected between the ac cross-coupled outputs of two transistors that are selectively biased to an appropriate common mode voltage to cause rapid build-up of oscillation...
|
|
|
6052036 |
Crystal oscillator with AGC and on-chip tuning
A highly stable single chip crystal controlled oscillator with automatic gain control. An amplitude detector monitors the output of a crystal controlled oscillator amplifier and produces a feedback...
|
|
|
6046647 |
Voltage-controlled oscillator
A Voltage Controlled Oscillator (VCO) mitigates the effects of package parasitics by providing positive feedback connections, to sustain a desired oscillation, external to the IC package, thereby...
|
|
|
6018274 |
Radio receiver and frequency generator for use with digital signal processing circuitry
The present invention relates to a radio receiver, particularly to a receiver for use in single-frequency applications, such as GPS, and to a frequency generator, which may be used in such a radio...
|
|
|
5999062 |
Crystal oscillator driver with amplitude control
A crystal oscillator drive circuit controls the maximum amplitude of the drive signal to a crystal by limiting the bias current of a gm cell which senses the oscillation amplitude of the crystal....
|
|
|
5963098 |
FM canceler loop to reduce shock and vibration effects in crystal oscillators
A canceler loop is used to provide negative feedback to a crystal oscillator to reduce the effects of shock and vibration on the spectral purity of the crystal oscillator. The canceler loop...
|
|
|
5962986 |
Solid state RF light driver for electrodeless lighting
A transformerless power oscillator for driving a high intensity electrodeless light bulb. The driver uses a silicon carbide static induction transistor (SIT) operating as a power oscillator powered...
|
|
|
5952894 |
Resonant circuit having a reactance for temperature compensation
A resonant circuit of the present invention has a ceramic substrate, a quartz element provided on said substrate, and a capacitor for temperature compensation. Connection terminals are formed on...
|
|
|
5923222 |
Low power amplifier and an oscillating circuit incorporating the amplifier
An oscillating circuit includes a low power inverting amplifier (10) having an input (208) and an output (209) and having a relatively high resistance d.c. biasing path (2) associated therewith. A...
|
|
|
5912594 |
Compact crystal oscillator having no large capacitor element
A Pierce oscillator has been modified to replace the large capacitor with an amplifier element in order to make it more compact. A first amplifier element has a control terminal and a main current...
|
|
|
5883550 |
Crystal oscillator with a temperature-compensating analog circuit
A temperature-compensated quartz oscillator comprises a stabilized power supply circuit (1) for supplying a constant voltage, an oscillation circuit (2) comprising a quartz resonator (21) and a...
|
|
|
5834982 |
Quick starting oscillator circuit having low power consumption
Supplied with a power source, an output level of an oscillating circuit gradually increases until the oscillator circuit reaches its steady oscillation. A level monitor monitors the output level,...
|
|
|
5805028 |
Temperature-compensating piezo-oscillator
A temperature-compensating piezo-oscillator uses a piezo-oscillator with temperature coefficient of frequency changing approximately linearly and includes a stabilized source circuit, a...
|
|
|
5789990 |
Feedback oscillator circuit using a saw resonator filter
A crystal-controlled oscillator circuit is modified by the present invention by replacing the crystal with the first signal port of a two-port SAW resonator filter that has a low-loss primarily...
|
|
|
5777524 |
Temperature compensation circuit for a crystal oscillator and associated circuitry
A temperature compensation circuit (10) for a crystal oscillator module (12) used in a communication device (200). An existing microcontroller (210) of the communication device (200) is used to...
|
|
|
5767745 |
Solid resonator based oscillator having a phase control circuit
An oscillator circuit having a phase control circuit performing phase control on the oscillation signal based on a signal representing a phase difference between a signal input from outside and the...
|
|
|
5760656 |
Temperature compensation circuit for a crystal oscillator and associated circuitry
A temperature compensation circuit (10) for a crystal oscillator module (12) used in a communication device (200). An existing microcontroller (210) of the communication device (200) is used to...
|
|
|
5731744 |
Voltage controlled oscillator
An apparatus and a method are provided to obtain oscillations from a crystal at a particular frequency by introducing real and imaginary components of voltage to the crystal. The imaginary...
|
|
|
5726536 |
Method of driving a cold cathode tube using a ceramic transformer
A cold cathode tube is used for a back light illuminating a liquid crystal with a light from the back. A ceramic transformer is used instead of a conventional wound transformer for a power source...
|
|
|
5712596 |
Tunable crystal oscillator with harmonic output
In an oscillator arrangement (VCXO), an oscillation loop (OSL) oscillates at, approximately, the fundamental frequency of a crystal (XTL) included therein. The output signal (Sosc) of the...
|
|
|
5712599 |
Oscillator having two cascaded gain stages with feedback operating near their unity gain frequency
An oscillating signal generator for generating an oscillating signal having a variable oscillation frequency that can be near the unity gain frequency of the gain devices within the oscillating...
|
|
|
5708394 |
Bridge-stabilized oscillator circuit and method
An apparatus and method are disclosed for improving the stability of the frequency of vibration of an oscillator signal produced by an oscillator circuit. In a preferred embodiment of the present...
|
|
|
5703543 |
Current limited cross-coupled oscillators
A switching oscillator constituted by two inverters is provided with a system of current mirrors each arranged to provide a small proportion of load current from the load of one transistor to the...
|
|
|
5696469 |
Clock oscillator
A clock oscillator having a pair of pins adapted for coupling to an external crystal, a first one of such pair of pins being adapted for coupling to an external clock. A switch, formed on the chip,...
|
|
|
5675296 |
Capacitive-component reducing circuit in electrostatic-type transducer means
A drive voltage is supplied to a piezoelectric oscillator from an A.C. drive power source. Attached to an electrode of the piezoelectric oscillator is a loop circuit in which an amplifier having a...
|
|
|
5654678 |
Level-controlled oscillation circuit having a continuously variable impedance control circuit
An oscillation circuit using a quartz oscillator. When the output level of the oscillation circuit falls, this output level change is detected and the reactance of the quartz oscillator is changed...
|
|
|
5646580 |
Method and apparatus for switching crystals in a crystal controlled oscillator
A multi-crystal controlled oscillator (10) and method includes a first crystal resonator (11), second crystal resonator (14), oscillator circuit (23), and a switch (29). The switch (29) is coupled...
|
|
|
5627498 |
Multiple frequency oscillator
An oscillator comprises a first inverter provided with a resonant feedback circuit, a second inverter having its signal input terminal at the same DC level as the signal input terminal of the first...
|
|
|
5596311 |
Method and apparatus for driving a self-resonant acoustic transducer
A method and system employing a feedback signal indicative of monitored motion of an electro-mechanical acoustic transducer to generate one or both of a control signal for driving the transducer at...
|
|
|
5589804 |
Oscillator with impedance buffer for increased pullability
A pullable overtone crystal oscillator (201) includes an impedance buffer (217) for buffering an input impedance (109) to an amplifier stage (203). This structure enables construction of an...
|
|
|
5528201 |
Pierce crystal oscillator having reliable startup for integrated circuits
A Pierce crystal oscillator circuit for a digital integrated circuit has a capacitance element (such as a field effect capacitor) of an appropriate capacitance value disposed on-board the...
|
|
|
5481228 |
Method and apparatus for controlling oscillator duty cycle
A controller circuit adjusts the output signal duty cycle of an oscillator circuit. The controller circuit changes the effective bias voltage of an amplifier in a Pierce oscillator by enabling a...
|
|
|
5473289 |
Temperature compensated crystal oscillator
A temperature compensated crystal oscillator including: an oscillation circuit having a quartz crystal resonator and a control terminal, for providing an oscillating signal determined by the quartz...
|
|
|
5473287 |
Electronic oscillator with transmission line tuning of phase noise and linearity
An improved electronic oscillator of limited bandwidth for better phase noise and linearity characteristics, and method for production, where a transmission line of specific characteristics is...
|
|
|
5473288 |
Oscillation circuit
The oscillation circuit 30 has the two input terminals 32a and 32b connected to the piezoelectric elements 3a and 3b of vibrator 1. These input terminals 32a and 32b are connected to the two input...
|
|
|
5457433 |
Low-power inverter for crystal oscillator buffer or the like
A low-power inverter (53) reduces power consumption over known inverter designs and is especially well-adapted for serving as a buffer in a Pierce crystal oscillator with a large load capacitance....
|