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| Number | Title | Issue Date |
| 7353011 | Method and apparatus for operating a PLL for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 04/01/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7253671 | Apparatus and method for compensating for clock drift in downhole drilling components A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded num... | 08/07/2007 |
| 7251465 | Method and apparatus for producing mobile radio signals A method and device are provided for producing mobile radio signals, which utilize a direct conversion receiver, at least one first and one second local oscillator and one regenerative divider for processing signals according to different mobile radio standards. For... | 07/31/2007 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7082171 | Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul... | 07/25/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7027786 | Carrier and clock recovery using universal frequency translation Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO signal is in frequency and phase coherence with the received EM signal. ... | 04/11/2006 |
| 7015764 | Analog implementation of spread spectrum frequency modulation in a programmable phase locked loop (PLL) system A PLL circuit is described. The PLL circuit includes: a signal generator; and a spread spectrum modulator coupled to the signal generator, where the spread spectrum modulator receives a control voltage as an input and provides a spread spectrum control voltage to th... | 03/21/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 6993307 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 01/31/2006 |
| 6970496 | RF modem and communications transceiver utilizing saw device and pulse shaping A bidirectional direct sequence spread spectrum half-duplex RF modem that can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW based correlator for performing the spreading and de-spreading functi... | 11/29/2005 |
| 6965761 | Controlled oscillator circuitry for synthesizing high-frequency signals and associated method A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 11/15/2005 |
| 6960961 | EMI reduction of oscillating signals by way of controlled randomized modulation An electrical circuit generates an oscillating signal that produces reduced electromagnetic interference by way of modulation of the frequency of the oscillating signal within a specified frequency range. A randomized signal generator creates a randomized signal, wh... | 11/01/2005 |
| 6946916 | Arrangement and a method relating to phase locking The present invention relates to an arrangement for phase locking of a Voltage Controlled Oscillator (VCO) to a selected frequency harmonic among a number of predetermined or available frequencies (harmonics), comprising a reference generator for generating a refere... | 09/20/2005 |
| 6934665 | Electronic sensor with signal conditioning A method for extracting components from signals in an electronic sensor (50) having a sensing element (52). The sensing element (52) generates a first signal (60) and a second signal (62). The method comprises the steps of: receivi... | 08/23/2005 |
| 6798302 | Analog implementation of spread spectrum frequency modulation in a programmable phase locked loop (PLL) system A PLL circuit is described. The PLL circuit includes: a signal generator; and a spread spectrum modulator coupled to the signal generator, where the spread spectrum modulator receives a control voltage as an input and provides a spread spectrum control voltage to th... | 09/28/2004 |
| 6091306 | Circuit configuration with main and subordinate oscillators Parasitic feedback is prevented in a transmitter, a modulator, or a demodulator from having an interfering influence on the circuit section that generates the mixed frequency. The circuit has a main oscillator and a subordinate oscillator connected downst... | 07/18/2000 |
| 5952834 | Low noise signal synthesizer and phase noise measurement system A phase noise measurement system including a low noise programmable synthesizer and a receiver/down converter is provided. The low noise synthesizer provides L-Band Signals which can selectively exhibit low noise close-in or low noise far out. The receive... | 09/14/1999 |
| 5847613 | Compensation of long term oscillator drift using signals from distant hydrogen clouds A method and apparatus for compensating for the long term drift of an oscillator. Signals from hydrogen clouds are received and processed to generate an adjustment signal, which is used to adjust the frequency of the oscillator. The adjustment signal is d... | 12/08/1998 |
| 5748047 | Microwave frequency generator and method of generating a desired microwave frequency signal A microwave frequency generator and method of generating a predetermined microwave signal. The invention comprises oscillator means to generate a determinable frequency signal and means responsive to the frequency signal received from the oscillator means... | 05/05/1998 |
| 5703538 | Radar exciter local oscillator phase lock acquisition control circuit A phase lock acquisition control circuit for the local oscillator (LO) of a radar exciter. The control circuit includes a programmable logic array, a microsequencer and a counter employed as a divide-by-eight circuit which supplies a clock reference for t... | 12/30/1997 |
| 5508661 | Fast tuning YIG frequency synthesizer A frequency synthesizer using a fixed oscillator driving a comb line generator to generate a spectrum of comb lines, one of which is selected by a switched array of fixed-tuned, YIG passband filters. The selected comb line is combined in a mixer with a si... | 04/16/1996 |
| 5440275 | Marker sweep linearization system and method A multi-marker microwave sweep linearization system comprising a voltage controlled microwave oscillator utilizing an adaptive sweep control circuit is presented. The oscillator control voltage is to be adjusted as necessary to maintain a constant spacing... | 08/08/1995 |
| 5408196 | Tunable device A signal receiving device is kept tuned by a tuning signal, which supplied to a tuning input of a tunable circuit in the signal receiving device. The tuning signal is supplied from a memory. The signal receiving device has an operating state and a calibra... | 04/18/1995 |
| 5243302 | Voltage controlled oscillator with correction of tuning curve non-linearities A scanning-superhetrodyne ESM receiver having a VCO for a local oscillator which is linearized and temperature compensated. A stable combline oscillator is used to generate known frequency signals which are frequency converted to an intermediate frequency... | 09/07/1993 |
| 5179725 | Voltage controlled oscillator with correction of tuning curve non-linearities A scanning-superhetrodyne ESM receiver having a VCO for a local oscillator which is linearized and temperature compensated. A stable combline oscillator is used to generate known frequency signals which are frequency converted to an intermediate frequency... | 01/12/1993 |
| 5146186 | Programmable-step, high-resolution frequency synthesizer which substantially eliminates spurious frequencies without adversely affecting phase noise A frequency synthesizer is described which operates over a wide frequency range at high resolution and variable step size without trading off between spurious frequency rejection and phase noise suppression. The synthesizer includes a magnetically-turned ... | 09/08/1992 |
| 5015971 | Frequency agile microwave signal generator A frequency synthesized, microwave signal generator is disclosed that provides multiple channel frequency selection capability with rapid channel change time and low levels of spurious signals and noise. The generator uses a microwave harmonic phase locke... | 05/14/1991 |
| 4914405 | Frequency synthesizer A low-noise frequency synthesizer comprises a low-noise oscillator, such as a crystal oscillator, a multiplier, a divider and a phase-locked loop and is adapted to provide an output signal which is a combination of the multiplied and divided frequency. Th... | 04/03/1990 |
| 4845443 | Low noise multi-band channelized microwave frequency synthesizer The described embodiment of the present invention provides a technique for minimizing unwanted components in the output of a frequency synthesizer. The output signal of the frequency synthesizer is tapped and mixed with a selective reference control signa... | 07/04/1989 |
| 4728906 | Tuning and calibration circuits for CW and sweep frequency signal generators A signal generating device and method of control thereof for producing a desired output frequency, the generator having coarse and fine tuning controls capable of producing frequency changes over a limited range, wherein the output of the device is combin... | 03/01/1988 |
| 4611239 | Oscillator synchronizing system for eliminating static phase errors Non-inverting amplifier, with bandpass filter in regenerative feedback path, forms color reference oscillator in a color TV receiver. Phase shift circuit, responsive to an oscillator output, supplies signals to a first phase shifted signal amplifier, whic... | 09/09/1986 |
| 4603304 | Reference frequency generation for split-comb frequency synthesizer A frequency synthesizing apparatus of the closed-loop design employing a first frequency mixing means to provide a continuous constant increment frequency coverage over a given output signal frequency range. The first frequency mixing means is responsive ... | 07/29/1986 |
