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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. An...
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...
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...
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...
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 c...
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 diode-connected...
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 on...
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 detector...
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 for...
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...
7688154 Amplitude regulated crystal oscillator  
To maintain the amplitude of an oscillating signal within a defined range, the detected peak level of the oscillating signal is compared to a reference voltage. If the detected peak level is...
7688153 Automatically tuned tail filter  
The present invention relates to an oscillating circuit arrangement having a resonating arrangement with a first resonance frequency (coo) comprising a voltage controlled oscillator arrangement. It...
7675374 Voltage controlled oscillator with switching bias  
Provided is a voltage controlled oscillator to which a switching bias technique is applied so as to lower flicker noise of a bias circuit and enhance phase noise characteristics, thereby reducing...
7639097 Crystal oscillator circuit having fast start-up and method therefor  
In one embodiment, a method of programming an oscillator circuit includes providing a resonator, a first programmable capacitor, a second programmable capacitor, and an amplifier. The first...
7598821 Amplitude controlled quartz oscillator with broad voltage and temperature range  
The invention concerns an oscillator including an input terminal, an output terminal, a resonator, and an oscillator circuit including: first and second power supply terminals, two capacitors...
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, switches...
7554416 Multi-band LC resonance voltage-controlled oscillator with adjustable negative resistance cell  
Provided is an LC resonance voltage-controlled oscillator (VCO) used for a multi-band multi-mode wireless transceiver. In order to generate a multi-band frequency, a capacitor bank and a switchable...
7471163 Oxide overstress tolerant crystal oscillator  
An oscillator circuit includes a plurality of transistors that can withstand relatively low gate-to-source and gate-to-drain voltages. The oscillator circuit interfaces with an oscillator that...
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...
7355489 High gain, high frequency CMOS oscillator circuit and method  
An oscillator amplifier circuit is provided. The amplifier circuit can be used with a resonator to amplify and form a resonating oscillator. The amplifier circuit comprises an active circuit which...
7339441 Circuit and method for quickly turning off MOS device  
An OTA driving an MOS device needs to turn it off quickly to minimize overshoot during a heavy to light load state. The drains of the MOS device can be used to accelerate turning off the MOS...
7123109 Crystal oscillator with variable bias generator and variable loop filter  
An oscillator circuit may be operated in a high power mode or a reduced power mode. The high power mode provides fast start-up of the oscillator circuit.
7061337 Amplitude control circuit  
An amplitude control circuit comprises a first circuit configured to receive differential signals and provide a first signal based on the amplitudes of the differential signals, a second circuit...
7061338 Average controlled (AC) resonator driver  
Circuits and methods are given, to realize and implement an oscillator circuit with an Average Controlled (AC) Resonator Driver. A newly introduced additional Field Effect Transistor within a...
7038550 Smart current controlled (SCC) resonator driver  
A circuit and a method are given, to realize and implement an oscillator circuit with a Smart Current Controlled (SCC) Resonator Driver. A newly introduced controlled current source for a crystal...
7026883 Feedback loop for LC VCO  
A voltage-controlled oscillator includes an inductor capacitor (LC) tank; a drive circuit having a current source; and a feedback loop circuit. The feedback loop includes a peak detect circuit to...
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...
6909336 Discrete-time amplitude control of voltage-controlled oscillator  
Periodically, sensed amplitude for the output signal of a voltage-controlled oscillator is compared to a reference and biasing of the voltage-controlled oscillator is correspondingly set, thereby...
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...
6855995 Physically defined varactor in a CMOS process  
A differential varactor is physically defined in a CMOS process using a using the diffusion mask of a polycide gate rather than a P (+) mask, as is commonly used. The differential CMOS varactor may...
6838952 Amplitude control device for electrical oscillator and electrical oscillator comprising such a device  
An amplitude control device for a signal output by an oscillator includes a rectification circuit for rectifying the output signal, and a differential amplification circuit for generating a biasing...
6825736 Method and apparatus for controlling a voltage controlled oscillator  
A level detector (110, 104) and corresponding method detects (602) whether an output signal level of a VCO (102) is within a window bounded by minimum and maximum thresholds. When the output signal...
6816024 Oscillator circuit with switchable compensated amplifiers  
An oscillator circuit is specified, having an LC resonator, to which two or more current paths are connected, which are connected in parallel with one another and can be connected and disconnected...
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 envelope...
6798301 Method and apparatus for controlling oscillation amplitude and oscillation frequency of crystal oscillator  
A circuit controls an oscillation amplitude of a crystal oscillator including a crystal resonator, a current source supplying a bias current, and an output transistor coupled to the crystal...
6741137 High quality serial resonance oscillator  
A highly stable single chip resonator controlled oscillator with automatic gain control designed for manufacture in monolithic integrated circuit technologies. An automatic gain controller monitors...
6703905 Crystal oscillation circuit  
A crystal oscillation circuit using a crystal oscillator comprises an inverting amplifier, a buffer, and a voltage shift circuit. The voltage shift circuit operates in such a way that within...
6680655 Automatic gain control for a voltage controlled oscillator  
A novel circuit topology which provides for the digital automatic gain control of a VCO is disclosed. The topology of the VCO is based on the negative transconductance oscillator due to its...
Matches 1 - 50 out of 401 1 2 3 4 5 6 7 8 9 >