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8988156 Low EMI wide frequency range oscillator with automatic digital amplitude control  
An oscillator/amplifier has a gain controlled amplifier that maintains a desired oscillation waveform amplitude for all possible oscillation frequencies of operation. A peak detector produces a...
8981860 Use of electronic attenuator for MEMS oscillator overdrive protection  
An apparatus includes a microelectromechanical system (MEMS) device configured as part of an oscillator. The MEMS device includes a mass suspended from a substrate of the MEMS, a first electrode...
8975976 Multi-power mode reference clock with constant duty cycle  
A power management apparatus and method for maintaining a substantially constant duty cycle of a reference clock signal in a multi-power oscillator, includes a first output power transistor in...
8937514 Local oscillator (LO) driver circuit for a mixer  
An improved local oscillator (LO) driver circuit for a mixer, the LO driver circuit includes a gain circuit responsive to LO input signals at a predetermined LO frequency range. At least a first...
8933758 Bridge-stabilized oscillator with feedback control  
A bridge-stabilized oscillator with feedback control includes an RF amplifier connected to a first bridge path and a second bridge path. Each first and second bridge path has a variable gain...
8922287 Amplitude loop control for oscillators  
Systems and methods for amplitude loop control for oscillators. In some embodiments, an electronic circuit may include oscillator circuitry configured to produce a periodic signal, and control...
8860595 Scalable voltage ramp control for power supply systems  
A system for scalable voltage ramp control for power supply systems. A system may comprise at least power supply circuitry, digital-to-analog (D/A) converter circuitry and a controller. The power...
8816786 Method and apparatus of a crystal oscillator with a noiseless and amplitude based start up control loop  
A large gain is used to start up the oscillation of the crystal quickly. Once the oscillation starts, the amplitude is detected. A control circuit determines based on the measured amplitude to...
8803621 Semiconductor device having oscillator circuit  
An oscillation circuit section is provided which can attain the reduction of a consumed power amount and the reduction of a manufacturing cost. In a semiconductor device, voltages are generated to...
8773209 Frequency generating system, voltage-controlled oscillator module and method for adjusting signal frequency  
A voltage controlled oscillator module including a VCO unit and a gain adjustment unit is provided. The VCO unit is configured to generate a frequency signal based on a control voltage. The gain...
8729971 Oscillator, and clock generator, semiconductor device, and electronic device including the same  
An oscillator includes a reference voltage generator, an oscillation element configured to oscillate by either a drive voltage or a drive current and output an oscillation signal, a peak hold...
8729968 Built-in self-test circuit for voltage controlled oscillators  
A built-in self-test circuit for testing a voltage controlled oscillator comprises a voltage controlled oscillator, a buffer having an input coupled to an output of the voltage controlled...
8723610 Voltage controlled oscillator  
A bias loop is used to program LC tank common mode voltage to allow operation at two different supply voltages VDD (e.g., 2.5V and 1.2V), and two different tank swings. This also allows lower...
8710937 Low power voltage controlled oscillator (VCO)  
An apparatus includes a tank circuit of a voltage controlled oscillator. A pair of alternating current coupling capacitors respectively couple the gates of the pair of transistors to the drains of...
8686798 Method and system for testing oscillator circuit  
An oscillator circuit generates a voltage signal. The magnitude of the voltage signal is measured and compared with predetermined upper and lower voltage signals by an internal test circuit. If...
8633776 System and method for effectively performing a clock signal distribution procedure  
A system and method for effectively performing a clock signal distribution procedure includes a clock generator configured to generate one or more clock signals that include electronic timing...
8614606 Delay-line self-oscillator  
An electrical, magnetic or electromagnetic delay line self oscillator is described with a delay line arrangement, an oscillator control circuitry, and a frequency selection impedance connecting...
8610509 Flexible low current oscillator for multiphase operations  
A method for generating an oscillator signal uses a multiphase oscillator having a plurality of input stages and a reference stage. Each input stage produces an input stage voltage that represents...
8564378 Voltage-controlled oscillating circuit and crystal oscillator  
A voltage-controlled oscillating circuit includes a differential amplifying circuit connected to a resonant element such as a quartz crystal element. The differential amplifying circuit includes...
8487709 Oscillator circuit  
An oscillator circuit comprises a piezoelectric vibrator, an amplifier device including inverters provided in a plurality of stages, and an inverter control device. The inverters provided in the...
8471644 Digital automatic gain control circuits and methods for controlling the amplitude of a time-varying signal  
A gain control circuit, suitable for controlling the amplitude of a voltage-controlled oscillator, includes a duty cycle detector, an analog-to-digital converter, and a function generator. The...
8466754 Low phase noise MEMS-based oscillator with bifurcation and parametric noise squeezing  
The present invention is a method for reducing phase noise in oscillator signals. For example, the oscillator may be a low phase noise MEMS-based oscillator and may include a resonator (ex.—a MEMS...
8451071 Low noise oscillators  
An oscillator having: (A) a transistor for producing an oscillating output signal at an output electrode of the transistor. The oscillator includes; (B) a bias circuit for producing a bias signal...
8362847 Oscillator circuit and method of improving noise immunity  
Noise immunity of an oscillator circuit is improved by either increasing the oscillation amplitude of the core's oscillating signal or configuring a built-in low pass filter.
8351867 Oscillator, frequency generating circuit and wireless communication system using the oscillator  
The present invention provides an oscillator and a communication system using the oscillator, in particular, an LC oscillator adapted to lessen phase noise deterioration due to harmonic...
8289090 Amplitude control for oscillator  
An amplitude control circuit includes a pair of peak detectors. The pair of peak detectors are responsive to a voltage reference generator. The amplitude control circuit is configured to be...
8242854 Enhancing device reliability for voltage controlled oscillator (VCO) buffers under high voltage swing conditions  
A circuit for a voltage controlled oscillator (VCO) buffer is described. The circuit includes a first capacitor connected to an input of the VCO buffer that is connected to a VCO core. The circuit...
8228130 Circuitry and method for precision amplitude control in quartz and MEMS oscillators  
An oscillator includes oscillator circuitry (8) including a transconductance stage (2) and a resonator (3). A comparator (10) produces first (CLK) and second (/CLK) clock signals which indicate...
8159307 Logical element  
In a logical element, supporting portions, and a beam supported by them at two ends are formed. The beam has a back side surface spaced apart from the top side surface of a substrate, creating a...
8134417 Automatic amplitude control for voltage controlled oscillator  
A circuit and method for calibrating a VCO (voltage controlled oscillator) is disclosed. In one embodiment, a circuit includes a VCO and a bias control circuit coupled to a tail node of the VCO....
8089324 Varactor-free amplitude controlled oscillator(ACO) for system on chip and system on card Xtaless clock SOC  
The fundamental breakthrough in green technology are the Varactor Free Amplitude Controlled Oscillator VFACO and the planar EMI-Free Planar Inductor. The VFACO makes the fine tune for oscillation...
8076970 Adaptive demodulator  
An adaptive demodulator for a contactless device, including a rectifier configured to rectify a voltage which is dependent on a signal received by the contactless device, and a voltage regulator...
8076982 Voltage-controlled variable frequency oscillation circuit and signal processing circuit  
A voltage-controlled variable frequency oscillation circuit, includes: an oscillation circuit section including a resonance circuit which includes a coil and a variable capacitance element, and a...
8044731 Oscillator circuit  
There is provided an oscillator circuit including: a current source; a resonant unit; an oscillation amplification unit connected to the current source and connected in parallel to the resonant...
8035455 Oscillator amplitude control network  
An amplitude control circuit (100) can include a peak level detect circuit (102) that generates a peak voltage signal (Vpeak′) based on a peak level of signal Xosc. An amplitude bias control...
7982553 Clock generator  
This invention discloses a clock generator capable of automatically adjusting output clock when process, voltage, or temperature variation occurred. The clock generator comprises a current...
7924102 Symmetric load delay cell oscillator  
An oscillator includes a control circuit and a ring of symmetric load delay cells. Each delay cell includes two novel symmetric loads. Each load involves a level shift circuit and a...
7911284 Voltage controlled oscillator  
A voltage controlled oscillator circuit comprises a variable current generator to supply an operation current to a voltage controlled oscillator, the voltage controlled oscillator to include a...
7895894 Driver device, physical quantity measuring device, and electronic instrument  
A driver device includes a gain control amplifier that causes a vibrator to produce driving vibrations by controlling an oscillation amplitude in an oscillation loop, a signal generation circuit...
7863993 Oscillator for providing oscillation signal with controllable frequency  
An oscillator, including amplifier circuitry and resonant circuitry, for providing an oscillation signal with a controllable frequency while maintaining a substantially constant steady state...
7863989 Replica-bias automatic gain control  
A gain control system comprises a reference stage, a bias replication stage, an operational amplifier, an automatic gain control block, a gain stage, and a crystal oscillator in one embodiment. A...
7855606 Oscillator device  
An oscillator device having an oscillation system including an oscillator and a resilient supporting member, a driving member configured to supply a driving force to the oscillation system based...
7849746 Driver device, physical quantity measuring device, and electronic instrument  
A driver device that forms an oscillation loop with a vibrator and causes the vibrator to produce driving vibrations includes a current-voltage converter that is provided in the oscillation loop...
7839230 PLL oscillation circuit, polar transmitting circuit, and communication device  
Provided is a PLL oscillation circuit that can reduce the variability of modulation sensitivity of a VCO 101 and obtain a desired output amplitude quickly with high precision. An amplitude...
7808334 Oscillation driver circuit, oscillation driver device, physical quantity measurement circuit, physical quantity measurement device, and electronic instrument  
An oscillation driver circuit that drives a physical quantity transducer includes a one-input/two-output comparator. The one-input/two-output comparator includes a shared differential section that...
7756487 Local oscillator with non-harmonic ratio between oscillator and RF frequencies using pulse generation and selection  
A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes...
7724101 Crystal oscillator circuit with amplitude control  
A crystal oscillator circuit includes a capacitive load stage coupled to a crystal; an amplifier stage including an amplifying transistor coupled to the crystal and to the capacitive load stage...
7714674 System and method for calibrating bias current for low power RTC oscillator  
The integrated circuit package includes a processing core for operating on a set of instructions to carry out predefined processes. A real time clock circuit provides a system clock for the...
7696834 Voltage controlled oscillator and method capable of reducing phase noise and jitter with startup gain  
A voltage-controlled oscillator includes: a bias voltage generator operating to generate first and second bias voltages in response to a control signal; a voltage-controlled oscillation circuit...
7692506 Oscillation driver device, physical quantity measuring device, and electronic instrument  
An oscillation driver device includes a gain control amplifier, an automatic gain control circuit, and a mode setting circuit. When the mode setting circuit has switched a mode from a normal...