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| Number | Title | Issue Date |
| 8183941 | Electronic device for generating a local oscillator signal having a frequency equal to a fractional part of a fundamental frequency An electronic device (ED) is intended for generating a local oscillator signal having a chosen frequency FLO from a main signal outputted by a voltage-controlled oscillator (VCO) and having a fundamental frequency FVCO and harmonics thereof. Th... | 05/22/2012 |
| 7924106 | Oscillation module To provide an oscillation module which is able to improve an input level by passing signals in a main signal band while removing near noise and far noise. An oscillation module is provided with an OCXO, an amplifier, and a noise elimination filter. The noise ... | 04/12/2011 |
| 7847646 | Carrier generator with LC network A carrier generator for generating a carrier at a frequency of interest in a wireless communications system comprises an oscillator exhibiting a first impedance, the oscillator comprising an energy storage tank configured to generate a periodic signal, the energy st... | 12/07/2010 |
| 7576619 | Integrated circuit arrangement An integrated circuit arrangement is disclosed. In one embodiment, the integrated circuit arrangement includes an output circuit having at least one first output connection which can provide a data signal, at least one first data output connection; and at least one ... | 08/18/2009 |
| 7432770 | Signal transmission device The present invention provides a signal transmission device in which jitter occurring in a clock signal is eliminated. The signal transmission device has a construction in which a transmission end IC chip provided with a transmission part of a data signal and a rece... | 10/07/2008 |
| 7397314 | Redundant clock source A redundant clock source provides a stable clock source for digital system. The clock source uses two oscillators to generate a clock signal. If one of the oscillators fails, the clock signal is generated from the other oscillator until the failed oscillator is repl... | 07/08/2008 |
| 7362190 | Oscillator circuit with high pass filter and low pass filter in output stage An integrated circuit has an internal oscillator circuit for being connected to an external frequency source such as a crystal or a ceramic resonator. The internal oscillator circuit has an inverting amplifier across the frequency source terminals to establish an os... | 04/22/2008 |
| 7355484 | Oscillator and radar apparatus using the same An oscillator and a radar apparatus that includes a resonator electro-magnetically connected to a micro strip line and a rotor connected to the resonator by capacitance. The bottom surface of the rotor has a changing height in the circumferential direction of the ro... | 04/08/2008 |
| 7345549 | Phase locking on aliased frequencies A phase-locked loop (200) includes a sampler (202), a phase detector (210), a loop filter (212), and a VCO (214). The loop achieves frequency multiplication without the need for a divider in the loop's feedback path. The VCO (21... | 03/18/2008 |
| 7298217 | Phased array radar systems and subassemblies thereof A phase shifter is fed an input signal having a frequency f. A coupler is included fed by the input signal. The coupler has a pair of output terminals for providing a pair of signals having the frequency f and having a relative phase shift difference of mπ/2 radian... | 11/20/2007 |
| 7277683 | Regenerative divider for up and down conversion of radio frequency (RF) signals The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demod... | 10/02/2007 |
| 7132899 | Method and apparatus for providing an improved high speed buffer A method and apparatus for providing a high speed buffer with high gain bandwidth and rail-to-rail operation is disclosed. Resistor-capacitor (RC) filters are added in current mirrors that are in the signal path. The effect of these filters is to create a frequency-... | 11/07/2006 |
| 7071869 | Radar system using quadrature signal A radar system using a quadrature signal includes a quadrature push—push oscillator for generating four harmonics with a 90-degree phase difference from each other, and producing two-balanced 2nd harmonic signals from the harmonics; a first coupler bloc... | 07/04/2006 |
| 6987423 | Two port voltage controlled oscillator for use in wireless personal area network synthesizers A voltage controlled oscillator (VCO) for use in a personal area network synthesizer includes a delay cell (100), a first current amplifier (201, 203) for amplifying an input current, a resister capacitor (RC) tuning network (207, 209, 211) for ... | 01/17/2006 |
| 6844763 | Wideband modulation summing network and method thereof A wideband impedance attenuator includes a phase-locked loop filter, a voltage-controlled oscillator connected to the phase-locked loop filter during transmit, and an impedance circuit connected to the phase-locked loop filter and the voltage controlled oscillator. ... | 01/18/2005 |
| 6762651 | High frequency crystal oscillator and high frequency signal generating method A high frequency oscillator according to the present invention is structured in a small size and prevents noise from taking place in a severe environment of which there is a large temperature change. In the high frequency oscillator according to the present inventio... | 07/13/2004 |
| 6756863 | High-frequency oscillator of frequency switching type and high-frequency oscillation method An oscillator of frequency switching type according to the present invention is adapted to select and output any of a plurality of high frequencies. The oscillator of frequency switching type includes a plurality of crystal oscillators whose fundamental frequencies ... | 06/29/2004 |
| 6549083 | High-frequency crystal oscillator outputting a harmonic component A high-frequency crystal oscillator capable of outputting a signal at a frequency, for example, higher than 500 MHz without using a multiplication amplifier. The high-frequency crystal oscillator comprises a voltage controlled Colpitts oscillation circuit... | 04/15/2003 |
| 6498538 | Low jitter integrated phase locked loop with broad tuning range System and method for providing low noise signal having a broad tuning range (1 GHz to 10 GHz, or larger), with associated jitter no more than about 10 percent of the selected period of a target output signal. In a first stage, a ring-based VCO phase lock... | 12/24/2002 |
| 6459341 | Voltage controlled oscillation device A voltage controlled oscillation device includes a voltage controlled oscillator, fixed-frequency oscillator, frequency mixer, and frequency selector. The voltage controlled oscillator changes the output signal frequency in the microwave band in accordanc... | 10/01/2002 |
| 6356143 | Method and apparatus for filtering radio frequency signals A variable bandpass filter system passes a selected range of frequencies while rejecting other frequencies in an RF input signal. The system includes a switch and an oscillator. The switch receives the RF input signal and an oscillating calibration signal... | 03/12/2002 |
| 6348842 | Method and apparatus for achieving accurate temperature-invariant sampling frequencies in a multiple message non-volatile multilevel analog signal recording and playback system An apparatus and method for achieving accurate temperature-invariant sampling frequencies in a device, such as, a multiple message non-volatile multilevel analog signal recording and playback system is described. An oscillator is used to generate an oscil... | 02/19/2002 |
| 6292063 | Oscillating apparatus including two-band resonance circuit The two-band oscillating apparatus of the present invention comprises in one aspect a first oscillator for outputting an oscillation signal of a first frequency band, a second oscillator for outputting an oscillation signal of a second frequency band whic... | 09/18/2001 |
| 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 switch circuit for turning on and off the first oscillation tra... | 09/11/2001 |
| 6252470 | Microwave oscillating circuit and remotely controllable "Kotatsu" using the same An oscillating circuit adjusts its oscillating frequency through the following method. A tip-open type strip-line stub coupled to the base terminal of the transistor. An electrical length of the stub is changed by an adjusting mechanism such as coupling t... | 06/26/2001 |
| 6181216 | Low phase-noise voltage controlled oscillator An oscillator is formed using a Field-Effect Transistor (FET) in a Colpitts configuration. The circuit has a resistor from source to ground. Also connected to the source are two capacitors, one between the source and ground while the other is from source ... | 01/30/2001 |
| 6163223 | High performance dual mode multiple source/local oscillator module A dual-mode multiple signal source/local oscillator module is capable of operating in either an independent offset mode or a common offset mode. The module includes first and second coarse frequency sources, a first signal generator coupled to the first c... | 12/19/2000 |
| 6057740 | Local oscillator system using harmonic derived from phase locked loop A method and a stable local oscillator system for providing a signal centered at a frequency of interest to a radio frequency (RF) converter. The method includes the following steps: (a) generating an output signal which comprises a fundamental signal cen... | 05/02/2000 |
| 6018274 | Radio receiver and frequency generator for use with digital signal processing circuitry The present invention relates to a radio receiver, particularly to a receiver for use in single-frequency applications, such as GPS, and to a frequency generator, which may be used in such a radio receiver, or elsewhere. The frequency generator comprises ... | 01/25/2000 |
| 5923225 | Noise-reduction systems and methods using photonic bandgap crystals Active electronic circuits are immersed in photonic bandgap crystals (PBC's) that form part of transmission lines for propagation of output signals of the electronic circuits. The output signals of the electronic circuits are accompanied by noise signals ... | 07/13/1999 |
| 5920234 | Buffered oscillator transmitter arrangement for power specific applications having parasitic impedances A transmitter circuit includes an output impedance and a buffered oscillator. The buffered oscillator includes a resonator for generating a reference signal and an amplifier coupled with the resonator for amplifying the reference signal. A first resonant ... | 07/06/1999 |
| 5770977 | Microwave frequency synthesizer with ultra-fast frequency settling and very high frequency resolution The ability to achieve ultra-fast frequency settling times with good frequency resolution and high absolute accuracy over significant bandwidth at microwave frequencies ranging over three octaves. The implementation is an open-loop system requiring little... | 06/23/1998 |
| 5721515 | High stability single-port saw resonator oscillator A high stability clock oscillator circuit that has no inductors in the oscillator circuit itself. In the preferred embodiment neither the collector, the base, nor the emitter of the transistor is grounded and the oscillator output is taken from the collec... | 02/24/1998 |
| 5712596 | Tunable crystal oscillator with harmonic output In an oscillator arrangement (VCXO), an oscillation loop (OSL) oscillates at, approximately, the fundamental frequency of a crystal (XTL) included therein. The output signal (Sosc) of the oscillator arrangement (VCXO) is a harmonic extracted from the osci... | 01/27/1998 |
| 5699021 | Balanced and buffered oscillator and transmitter arrangement A balanced and buffered oscillator and transmitter arrangement includes a first and second oscillator, each of which include a resonator for generating a reference signal, an amplifier for amplifying the reference signal, a resonant tank for generating an... | 12/16/1997 |
| 5697095 | Tuner capable of reducing power consumption and heat generation There is provided a tuner capable of improving reliability thereof with reduced power consumption and reduced heat generation. In the tuner, one wideband amplifier circuit including one transistor constitutes a buffer amplifier. The wideband amplifier cir... | 12/09/1997 |
| 5625324 | Ultra low noise frequency generator producing the sum of plural signal sources The frequencies of N oscillators are summed to provide a signal generator output signal. Because the phase noise power spectral densities of the oscillators add as power, the frequency summed output exhibits a noise degradation over a single oscillator of... | 04/29/1997 |
| 5576667 | Voltage control type oscillator An inexpensive voltage control type oscillator suitable for use with a mobile radio communication system within a predetermined frequency band range. The oscillator includes a resonance circuit and an oscillation stage formed on a printed wiring board and... | 11/19/1996 |
| 5568098 | Frequency synthesizer for use in radio transmitter and receiver A phase comparator (91) makes a phase comparison between a frequency-divided signal from a frequency divider (98) and a reference oscillation signal from a reference signal oscillator (90). The phase error signal obtained from the comparison is passed thr... | 10/22/1996 |
| 5568095 | Balanced oscillator and transmitter arrangement The present invention teaches an oscillator and transmitter. The balanced oscillator comprises a resonator for generating a reference signal having a resonating frequency, a first oscillator for providing a first oscillating output in response to the reso... | 10/22/1996 |
