|
Match
|
Document |
Document Title |
|
|
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,...
|
|
|
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.
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
6657506 |
Low operating voltage crystal oscillator
An apparatus comprising a first circuit and a capacitor circuit. The first circuit may be configured to generate an output signal having a frequency in response to (i) an input signal having a...
|
|
|
6628175 |
Voltage-controlled crystal oscillator (VCXO) using MOS varactors coupled to an adjustable frequency-tuning voltage
A voltage-controlled crystal oscillator (VCXO) has variable load capacitors on the crystal nodes. The variable load capacitors are p-channel or n-channel transistors with their source and drain...
|
|
|
6590460 |
Reduced harmonic distortion oscillator circuit
A harmonically damped oscillator circuit including a controllable oscillator amplifier for generating an oscillator output signal and including an amplitude control circuit for controlling the...
|
|
|
6556092 |
Low consumption oscillator
A low consumption oscillator having an inverter connected to a high supply potential and to a low supply potential via two respective resistors, with the resistors formed of capacitors having...
|
|
|
6525619 |
Crystal-oscillator circuit for preventing stopping of oscillation
A crystal-oscillator circuit includes an oscillation transistor having the collector or the base thereof at a ground potential. A first capacitor is connected between the base and the emitter of...
|
|
|
6404296 |
Amplitude-leveled wide-range source-coupled oscillator
A source-coupled oscillator contains two main MESFETs which supply current to respective loads and which have sources connected through a capacitor. Each of the main MESFETs is supplied with a...
|
|
|
6329884 |
Oscillator circuit with current limiting devices
There is disclosed an oscillator circuit in which the first capacitor is connected between the input side of a CMOS inverter in a quartz oscillator circuit and a higher potential side, the second...
|
|
|
6323738 |
Voltage-controlled ring oscillator with level converting and amplitude control circuits
A voltage-controlled oscillator comprises a level converting circuit, an amplitude controller, a voltage-controlled oscillation section having differential delay cells connected in a ring form, and...
|
|
|
6278338 |
Crystal oscillator with peak detector amplitude control
A crystal oscillator apparatus is described that has a wide dynamic frequency range and that is capable of supporting a broad range of crystal types. The present invention reduces the unwanted side...
|
|
|
6268777 |
Single inductor fully integrated differential voltage controlled oscillator with automatic amplitude adjustment and on-chip varactor
The voltage controlled oscillator (VCO) of the present invention generally includes a energy storage circuit portion, an oscillator operably connected to the energy storage circuit portion, a...
|
|
|
6215365 |
Inductive proximity sensor oscillator
An inductive proximity sensor oscillator having a differential comparator in combination with a negative feedback network and a positive feedback network connected to the comparator. The positive...
|
|
|
6194973 |
Oscillator with automatic gain control
An oscillator having an adjustable gain circuit provides abundant gain when the oscillator is first powered up but reduces the gain substantially below its start-up value once oscillations build...
|
|
|
6166609 |
Oscillator circuit supplied with optimal power voltage according to oscillator output
A crystal oscillation circuit that is capable of operating stably with a low power consumption includes a signal inversion amplifier and a power control circuit that controls the power voltage of...
|
|
|
6137375 |
Loss control loop circuit for controlling the output voltage of a voltage-controlled oscillator
A circuit for controlling the loss of a VCO in a master-slave tuning system includes an envelope detector, an amplitude regulator, a current-mode circuit, and a low-pass filter. The envelope...
|
|
|
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...
|
|
|
6064277 |
Automatic biasing scheme for reducing oscillator phase noise
A drive circuit for an oscillator having an LC tank reduces phase noise by maximizing the oscillation amplitude and minimizing the drive to the tank. The drive circuit utilizes a capacitive...
|
|
|
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...
|
|
|
6025757 |
Piezoelectric oscillator circuit
There is disclosed an oscillator circuit comprising the first load capacitor with one electrode there of being connected with an input side of a CMOS inverter within a quartz oscillator circuit,...
|
|
|
6008701 |
Quadrature oscillator using inherent nonlinearities of impedance cells to limit amplitude
A quadrature oscillator based on two cross-coupled gm/C cells utilizes the inherent nonlinearity of positive and negative impedance cells to control the amplitude of oscillation, thereby...
|
|
|
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....
|
|
|
5994969 |
Ring oscillator having automatic gain and low frequency shut off circuits
A ring oscillator with differential delay stages employs an automatic gain control circuit producing a gain adjust signal that is responsive to a frequency control voltage applied to the ring...
|
|
|
5926071 |
Minimization of the power consumption in an oscillator
A method is presented for minimizing the current consumption and the operating voltage of a voltage controlled oscillator. According to the invention the oscillator's (Q2) output signal (RFout) is...
|
|
|
5834983 |
Wideband oscillator with automatic bias control
A bipolar negative resistance UHF oscillator having a voltage tunable resonator in its emitter circuit is operated at a fixed collector bias current and an RF detector is used as a convenient way...
|
|
|
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,...
|
|
|
5825255 |
Oscillator starting circuit
An oscillator in which the transconductance of an amplification transistor (T0) is limited through a measurement of the potential at the input electrode (G0) of the amplification transistor (T0) by...
|
|
|
5821828 |
An oscillator having a voltage controlled amplitude
An oscillator provided with an amplitude controller (AMPREG1) which is coupled by an input (G1) to an amplitude reference terminal (AMPREF1). The amplitude of the oscillator signal at the output...
|