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7616072 |
Integrated circuit and receiver of a global positioning system (GPS)
A global positioning system and integrated circuit with a differential oscillator and with a starting circuit connected to the differential oscillator, wherein the differential oscillator has a...
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7589586 |
High frequency signal detection circuit
A high frequency signal detection circuit includes an input terminal for a high frequency signal to be detected, a switch transferring the high frequency signal as intermittent ringing signal to a...
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7567135 |
Power monitoring device and methods thereof
To determine performance degradation at functional module in a normal power state due to a power control device, voltages are applied to oscillators at a power diagnostic module. A first voltage is...
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7545227 |
Low-latency start-up for a monolithic clock generator and timing/frequency reference
An apparatus, system and method are provided for low-latency start-up of a free-running harmonic oscillator. The exemplary apparatus embodiment comprises a first and second current sources to...
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7504900 |
Integrated circuit package including programmable oscillators
An integrated circuit package includes a processing core and an internal oscillator. The processing core operates on a set of instructions to carry out predefined processes. The internal oscillator...
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7492232 |
Oscillator circuit, semiconductor device and semiconductor memory device provided with the oscillator circuit, and control method of the oscillator circuit
There is provided an oscillator circuit capable of obtaining stable frequency by avoiding output having unstable frequency that is likely to occur to an operation/stop-control-feasible type...
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7482888 |
Fast startup resonant element oscillator
A startup circuit 200 and method 700 is provided for quickly starting up a resonator based oscillator. Tunable oscillator 201 provides an impetus signal to oscillator 205 through capacitor ...
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7474164 |
Radar oscillator
A radar oscillator has an oscillation unit and first and second switch circuits. The first switch circuit turns off an electric power supply to an amplifier in a non-input period of a pulse signal...
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7468628 |
Internal voltage generators for semiconductor memory device
An internal voltage generator capable of reducing the variation width in the level of an internal voltage VPP, by performing charge pumping only a predetermined number of times in a period where an...
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7429883 |
Oscillator configured to complete an output pulse after inactivation
An oscillator includes an oscillating block for generating a control signal in response to an enable signal, wherein the control signal is periodically toggled and a feedback block for receiving...
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7429897 |
Wide operating-frequency range voltage controlled oscillators
Voltage controlled oscillator (VCO) circuitry with low phase noise and a wide range of operating frequencies is presented. The VCO circuitry includes circuitry with two or more VCO sub-circuits,...
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7420432 |
Noise removal circuit
A noise removal circuit. The noise removal circuit comprises a crystal oscillator and a level decision module. The crystal oscillator generates an oscillating signal and an output clock signal. The...
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7339440 |
Nonlinear pulse oscillator methods and apparatus
Methods and apparatus for implementing stable self-starting and self-sustaining electrical nonlinear pulse (e.g., soliton, cnoidal wave, or quasi-soliton) oscillators. In one example, a nonlinear...
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7233213 |
Oscillator of semiconductor device
An oscillator of a semiconductor memory device, wherein a reference voltage that flexibly shifts according to the shift in a power supply voltage is generated, and a reference clock is generated...
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7196589 |
Apparatus and method for dual features of frequency setting and frequency synchronization in one pin
An integrated circuit includes an oscillator circuit, where a frequency of an oscillator output signal provided by the oscillator circuit is adjustable by either coupling a resistor to an input...
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7151419 |
Oscillation-stop detection circuit, oscillation-stop detection system, electronic device, and oscillation-stop detection method
An oscillation-stop detection circuit includes a switching unit that repeats turning on and off based on a cycle of an oscillation signal from an outside; a capacitor that is charged when the...
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7135939 |
Semiconductor device including an external oscillation circuit
A semiconductor device includes an external oscillation circuit connected to an external resonator, a self-exciting oscillation circuit, and an oscillation clock monitoring circuit, the oscillation...
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7078979 |
Phase controlled oscillator circuit with input signal coupler
An oscillating signal in an oscillator is caused to phase shift toward the phase of an input signal coupled to the oscillating signal. The resonant frequency of the oscillator is about equal to an...
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7009460 |
Method and apparatus for reducing the start time of a VCXO
A voltage controlled oscillator, such as a VCXO (Voltage Controlled Crystal Oscillator), for generating a desired reference frequency in a wireless terminal with a reduced start-up time is...
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6977557 |
Injection mode steering oscillator
A means is provided to establish oscillations on a particular mode or resonance of a quartz crystal in a crystal oscillator and to discriminate against other modes. This is done by injecting a...
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6943639 |
Arrangement for low power clock generation
A high accuracy crystal oscillator for generating a clock signal comprises a gain stage ( 2 ) controlled by a current from a current source ( 5 ), and a trimmable load capacitance ( 3, 4 ). To...
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6924708 |
Oscillator circuit having an expanded operating range
An oscillator circuit having an expanded operating range includes an amplifier portion amplifying an oscillating signal. A gain controlling portion controls the gain of the amplified oscillating...
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6919769 |
Method and apparatus for fast lock acquisition in self-biased phase locked loops
A self-biased phase locked loop (PLL) circuit includes a charge pump to generate a control voltage, a controlled oscillator coupled to the charge pump to generate the output signal based at least...
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6914494 |
Very low current oscillator with variable duty cycle
A low current oscillator circuit comprising a comparator for driving an output signal. A first capacitor chain is coupled to the comparator. The first capacitor chain is configured for setting a...
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6873215 |
Power down system and method for integrated circuits
A power down system and method for an integrated circuit that enables a power down mode to be maintained for a predetermined time is described herein. The power down system comprises an oscillator,...
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6864756 |
Automatic gain control circuit for controlling start-up time of oscillator and method thereof
An automatic gain control circuit for controlling a start-up time of an oscillator and a method thereof are provided. An oscillation detection unit is used to detect the start-up time of the...
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6861917 |
Oscillator system with switched-capacitor network and method for generating a precision time reference
Briefly, in accordance with embodiments of the invention, switched capacitors may be utilized to emulate resistors in a longer time constant feedback network for amplitude regulation of a crystal...
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6819195 |
Stimulated quick start oscillator
An oscillation circuit including a resonating element such as a crystal, an inverting amplifier and a resistor that each span the resonating element terminals, and two capacitors that capacitively...
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6816022 |
Oscillator system and method for starting and stopping an oscillator
An improved oscillator system has a control logic block which has an input from an external device to which clock is being provided. The input controls a counter which counts cycles from the...
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6812802 |
Method and apparatus for controlling a voltage controlled oscillator
A rectifier ( 306 ) rectifies ( 402 ) an output signal of a VCO ( 302 ) to produce an envelope signal proportional to an amplitude of the output signal. An integrator ( 308 ) integrates ( 404 ) the...
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6781470 |
Tunable oscillator
An oscillator includes a common logic circuit and a plurality of delay lines. Each delay line is configured to receive a state transition at its input terminal and to output a corresponding state...
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6762561 |
Radio frequency resonator
An apparatus having a radio frequency resonator, which has a coil, a capacitor means and at least one switch means being associated with another capacitor means, a resistor means and a high voltage...
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6686803 |
Integrated circuit incorporating circuitry for determining which of at least two possible frequencies is present on an externally provided reference signal and method therefor
An internal frequency reference, such as a VCO used in a PLL, having a free-running frequency fairly well controlled within a predictable range, is used as a rough frequency reference to determine,...
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6667666 |
Synchronous oscillators
A modification of the synchronous oscillator is described, having regenerative positive feedback. The circuit includes an amplifier, a high-Q tank circuit, and a conventional synchronous oscillator...
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6646514 |
System and method for reducing startup time in a temperature controlled crystal oscillator
A method and apparatus are provided for reducing a startup interval of a temperature controlled crystal oscillator chip. The method includes the steps of connecting an operating circuit of the...
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6633203 |
Method and apparatus for a gated oscillator in digital circuits
A gated oscillator is provided for digital circuits. The gated oscillator is achieved by the unconventional use of controlling the operating point of a Van der Pol oscillator. Oscillations are...
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6621359 |
Noise elimination circuit
A noise elimination circuit which can eliminate all noise of a reset signal of a microprocessor or an input signal effective in a specific logic level comprises: a ring oscillator unit for...
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6603365 |
Real-time clock backup
A real-time clock circuit for saving real time information during removal of a battery is presented. The battery provides power to the clock circuit during a steady-state mode. The clock circuit...
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6563386 |
Self-starter for PLL synthesizers
Resuming the operation of a phase locked loop (PLL) that has entered a hang up status. The output of the PLL is examined to determine whether the output is stuck at either high or low logical...
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6563391 |
Precision crystal oscillator circuit used in microcontroller
A microcontroller is disclosed that includes a crystal oscillator circuit that is programmable to provide multiple different levels of startup current. In the present embodiment, the crystal...
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6556094 |
Oscillator circuit and integrated circuit for oscillation
An oscillator circuit adapted for a piezoelectric oscillator which has a weak oscillation output for generating high frequencies is provided. The speed of operation of the oscillator circuit is...
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6515549 |
Semiconductor device having critical path connected by feedback ring oscillator
In a semiconductor integrated circuit, a selector 1 selects a signal FB at the input thereof by giving a proper level to a signal EN. By setting two-phase scan clocks SC 1 , SC 2 of F/F 2,4 so...
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6504442 |
Digitally controlled oscillator with recovery from sleep mode
A digitally controlled oscillator includes an adjustable signal generating circuit adapted to generate an oscillation signal. A feedback loop receives the oscillation signal from the adjustable...
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6501342 |
Power-conserving external clock for use with a clock-dependent integrated circuit
The problem of undesired power consumption in an oscillator during “stop” periods of a device is addressed by providing the oscillator in apparatus external to the device, the apparatus...
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6380815 |
Microwave pulse generator
The invention relates to a microwave pulse generator for generating microwave pulses with a pulse duration in the nanosecond range. The microwave pulse generator includes a pulse generator for...
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6288615 |
Switch-type oscillating circuit for providing isolation between first and second oscillating circuits
A switch-type oscillating circuit includes a first oscillating circuit for outputting an oscillation signal having a first frequency, which includes a first oscillation transistor and a first...
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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...
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6211774 |
Electronic horn and method for mimicking a multi-frequency tone
An electronic horn for mimicking a multi-frequency tone includes a wave signal generator for generating an input signal and a complex signal generator for generating a complex signal across a...
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6191662 |
Self-start circuits for low-power clock oscillators
A clock circuit includes an oscillator having a biasing node that causes the oscillator to enter a low-power state. The clock circuit also includes a kick-start circuit and a first mechanism. The...
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6188286 |
Method and system for synchronizing multiple subsystems using one voltage-controlled oscillator
A method for synchronizing multiple subsystems using one voltage-controlled oscillator. The method includes transmitting a phase and frequency aligned output of a voltage-controlled oscillator to...
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