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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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7609120 |
Voltage-controlled oscillator using LC resonator
Provided is a voltage-controlled oscillator (VCO) using an LC resonator circuit which includes a first resonance circuit in which two serially connected varactor diodes and an inductor are...
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7602259 |
Voltage-controlled oscillator
A voltage-controlled oscillator has an oscillation frequency controlled through a voltage applied across ends of a variable-capacitance element. The voltage-controlled oscillator has a frequency...
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7598819 |
Electronic circuit with transistors sharing one and the same well
The disclosure relates to an electronic circuit including at least one first and one second differential pair each including a plurality of transistors. All the transistors of said first and second...
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7595700 |
LC quadrature oscillator having phase and amplitude mismatch compensator
Embodiments of the invention may provide for an LC quadrature oscillator that includes two LC oscillators that are cross-coupled with each other to generate I/Q clock signals and a phase and...
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7589598 |
Dual-band voltage controlled oscillator
The present invention discloses a dual-band voltage controlled oscillator (VCO), comprising a plurality of resonant circuits; an inductor module; a plurality of switches of current source; a buffer...
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7586381 |
User-definable, low cost, low phase hit and spectrally pure tunable oscillator
A tunable oscillator includes a first transistor, a second transistor connected in parallel with the first transistor, a noise feedback and bias network coupled to the first and second transistors,...
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7586379 |
Voltage controlled oscillator with operation current adjusting device
A voltage controlled oscillator has an amplifier circuit which includes an inductor and a variable capacitance element, and outputs an oscillation signal of an oscillation frequency corresponding...
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7583156 |
Oscillator with multi-tap inductor, capacitors, and negative-Gm stages
System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. An electronic communications device includes a controller to regulate the operation of the electronic...
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7573343 |
RTD-HBT differential oscillator topology
The new RTD-HBT differential oscillator circuit topology is proposed. At the nodes of the inductors and varactors in the conventional differential oscillator topology, each the RTD is attached to...
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7573342 |
VCO pre-compensation
A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational...
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7567139 |
Voltage controlled oscillator, and PLL circuit and wireless communication apparatus using the same
A voltage controlled oscillator including an inductor circuit including inductors 101, 102 , a variable capacitance circuit 110 having variable capacitance elements 111, 112 changing a...
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7561001 |
Electronic oscillator circuit device
An electronic circuit device includes a negative resistance generating circuit, a second transistor and a path. The negative resistance generating circuit has a first transistor having a control...
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7561000 |
Oscillator circuit for a sensor
An oscillator circuit for a sensor, with a tuned circuit and an operational amplifier, the electrical oscillation of the tuned circuit is capable of being tapped between a first terminal and a...
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7557668 |
Injection-locked frequency divider
An injection-locked frequency divider is provided. The injection-locked frequency divider includes a variable reactance unit, a signal injection unit, a first switch, a second switch, a first...
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7557664 |
Injection-locked frequency divider
An injection-locked frequency divider (ILFD) can go beyond simple frequency division by an even number. In one embodiment, another differential pair of transistors is added to convert the injection...
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7547970 |
Semiconductor device
A semiconductor device, including a semiconductor substrate having an element region on a surface thereof, an electrical element being formed in the element region; an insulating layer formed on...
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7538630 |
Voltage controlled oscillator
The present invention is an oscillator including: a first resonance circuit including a first variable capacitance diode having a cathode connected to a control terminal, a first capacitor and a...
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7538624 |
Oscillator having multiple oscillation units
The present invention is an oscillator including: first transistors outputting oscillation signals of different oscillation frequencies to collectors; a common node to which outputs of emitters of...
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7535308 |
Voltage-controlled oscillator decreasing phase noise
A voltage-controlled oscillator includes an LC bank, a negative resistor circuit, a DC block, an AC block including a source resistor, and a first bias circuit controlled by a junction node of a...
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7532080 |
LC oscillator circuit with a compensation coil for parasitical collector capacitor
An oscillator circuit configuration comprising in an LC-parallel oscillatory circuit and a transistor as an amplifying element. A compensating winding is associated with the parallel oscillatory...
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7512389 |
Active inductors using bipolar silicon transistors
An active inductor includes bipolar transistors T 1 , T 2 , T 3 and TD (TD being arranged in diode), where T 1 's emitter is connected to an output port and to T 2 's collector. T 2 's base is...
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7511589 |
DFY of XtalClkChip: design for yield of trimming-free crystal-free precision reference clock osillator IC chip
A Design For Yield (DFY) of Crystal Chip (XTALCHIP (Trademark for a chip equivalent to a crystal resonator)) is to have the high yield of high quality high accurate clock chip to be able to...
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7508279 |
Resonance circuit with variable diodes
A resistance having a high impedance is connected between anode terminals of two variable capacitance diodes sharing a cathode, and the components described above are sealed in one package. The...
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7504935 |
Transponder
A transponder has a transponder tuned circuit, an energy store or energy supply and a starter device. The transponder tuned circuit has a tuned circuit capacitor and a tuned circuit coil with an...
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7504899 |
Inductor and capacitor-based clock generator and timing/frequency reference
In various embodiments, the invention provides a clock generator and/or a timing and frequency reference comprising an LC oscillator with a frequency controller to control and provide a stable...
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7489207 |
Structure for voltage controlled oscillator
Disclosed are design structures for systems and methods of generating a periodic signal.
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7479839 |
Varactor bank switching based on negative control voltage generation
A method and apparatus for varactor bank switching for a voltage controlled oscillator is disclosed. Varactor bank switching involves generating a negative bias voltage signal as a control signal...
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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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7471164 |
Oscillator and method for operating an oscillator
An oscillator is provided having an oscillator circuit including at least one oscillator circuit inductor and a first oscillator circuit capacitor, whereby the value of the first oscillator circuit...
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7456697 |
Variable degeneration impedance supply circuit using switch and electronic circuits using the same
A variable degeneration impedance supply circuit, including: two alternatively connected transistors; a capacitor circuit having a predetermined capacitance and serially connecting output terminals...
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7449971 |
Transistor oscillating circuit having low change in oscillating frequency due to change in power supply voltage
Provided is a transistor oscillating circuit capable of reducing change in oscillating frequency due to change in power supply voltage by improving a base bias circuit of an oscillating transistor ...
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7449970 |
Frequency tuning circuits and voltage-controlled oscillator including the same
A frequency fine tuning circuit for use in a voltage-controlled oscillator is provided. The frequency tuning circuit includes a first varactor, a second varactor and a center bias unit. The second...
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7436266 |
LC quadrature VCO having startup circuit
Provided is an Inductor-Capacitor (LC) quadrature Voltage Controlled Oscillator (VCO) having a startup circuit which can accurately select one of +90° and −90° as a phase difference between two...
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7432768 |
Voltage controlled digital analog oscillator and frequency synthesizer using the same
Provided are a voltage controlled digital analog oscillator and a frequency synthesizer using the same, the oscillator comprising an oscillator having a frequency of an output signal being...
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7429899 |
Reduced eddy current loss in LC tank circuits
Placing inductors or resistors in parallel causes the combined value of inductance or resistance to decrease according to the parallel combination rule. This invention decreases the parasitic...
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7423495 |
Oscillator and method for generating an oscillator signal
An oscillator includes a first resonator circuit, a second resonator circuit coupled to the first resonator circuit and a reconfigurable network having a transconductance and coupled to at least...
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7414488 |
Low phase noise differential LC tank VCO with current negative feedback
A differential voltage controlled oscillator (VCO) employed in a frequency synthesizer used as a local oscillator of a wireless communication on-chip transmitter/receiver is provided. More...
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7411468 |
Low voltage low-phase-noise oscillator
There is a disclosed an oscillator for generating a periodic signal, comprising a transistor and two electro-magnetically coupled inductors in positive feedback configuration, one of the inductors...
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7408422 |
Variable-capacitance circuit element
An electronic circuit element has two capacitance values selected by means of a main control signal. The electronic circuit element comprises two variable-capacitance electronic components...
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7405632 |
Voltage-controlled oscillator, transmitter, and receiver
A voltage-controlled oscillator includes (i) a first variable-capacity element, (ii) a resonance circuit whose resonance frequency changes in accordance with a control voltage applied to the first...
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7400209 |
Oscillator circuit
Present invention relates to an oscillator circuit comprising: resonator means ( 102 ) and, first and second emitter followers ( 116, 118 ) being symmetrically coupled to the resonator means and...
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7397318 |
Voltage-controlled oscillator
A voltage-controlled oscillator including a voltage-controlled oscillation section, a frequency control bias circuit, a temperature compensation bias circuit, and a temperature compensation bias...
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7385452 |
Voltage controlled oscillator using capacitive degeneration
A VCO is based on a capacitively emitter degenerated topology which uses a cross-coupled MOS pair as the degeneration cell. The cross-coupled MOS pair contributes additional conductance and results...
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7382206 |
Voltage controlled oscillator with body of transistors bias control
In a voltage controlled oscillator, a resonant circuit generates a resonant frequency in response to a tuning voltage. A differential oscillator includes first and second transistors differentially...
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7378709 |
Oscillator with a guard ring formed around an N well and constituent components integrally formed on the N well, on a semiconductor substrate
An oscillator capable of reducing a noise component when partly formed by using the CMOS process or the MOS process. A high-frequency amplifier circuit, a mixing circuit, a local oscillator 13 ,...
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7375601 |
Dual-band oscillator
When two oscillation signals are output from a common terminal through switching, to reduce attenuation of the oscillation signals, a dual-band oscillator includes a first oscillating transistor...
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7375598 |
System and method for increasing radio frequency (RF)/microwave inductor-capacitor (LC) oscillator frequency tuning range
System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. A preferred embodiment comprises a voltage controlled oscillator (VCO) configured to generate an output...
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7375597 |
Low-noise fine-frequency tuning
Circuits, methods, apparatus, and code that provide low-noise and high-resolution electronic circuit tuning. An exemplary embodiment of the present invention adjusts a capacitance value by...
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7369007 |
Oscillating circuit for suppressing second harmonic wave
An oscillating circuit includes an oscillating transistor in which the collector or the base is grounded in a high-frequency manner, and a bias resistor connects the emitter of the oscillating...
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