Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8095102 | Phase-lock loop In one implementation an output signal of an oscillator is varied to be within a desired frequency band with respect to a reference signal, the output signal having a plurality of phases. The implementation may include comparing the output signal with the reference ... | 01/10/2012 |
| 7574186 | Self-powered radio integrated circuit with embedded antenna A radio frequency circuit is generated as an integrated circuit that is arranged to provide transmission, receipt, and storage of data. The data is transmitted and received across a radio frequency band. An antenna is included within the integrated circuit, wherein ... | 08/11/2009 |
| 7397312 | Spectrum analyzer and method for correcting frequency errors A spectrum analyzer corrects for internal frequency errors in a reference oscillator using a timing control signal. The reference oscillator provides a reference signal at a reference frequency. An error detection circuit determines an error in the reference frequen... | 07/08/2008 |
| 7386286 | High frequency low noise phase-frequency detector and phase noise reduction method and apparatus The present invention discloses a new type of extremely low-noise phase-frequency detector (PFD) 500, broadband from DC to multi-GHz RF frequencies for PLL synthesizer applications. Free of any feedback mechanisms, thus inherently fast, it operates close to t... | 06/10/2008 |
| 7383033 | Differential and quadrature harmonic VCO and methods therefor A differential and quadrature harmonic voltage controlled oscillator (VCO), and a method for generating a differential and quadrature harmonic signal. The VCO may include a first oscillation unit for generating a first and a third signal, a first combining unit for ... | 06/03/2008 |
| 7343135 | Method and apparatus for down conversion of radio frequency (RF) signals There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signa... | 03/11/2008 |
| 7336739 | Cross-correlation signal detector A method, system, and computer program product are provided for detecting at least one signal of interest within an input signal. At least one set of samples from the input signal is multiplied by at least one set of samples representing a complex conjugate of the i... | 02/26/2008 |
| 7313380 | Variable resolution A/D converter A variable resolution analog-to-digital converter includes a sample-and-hold circuit including a plurality of sample-and-hold units which are connected in parallel and selectively activated corresponding to a required resolution to sample and hold an analog input si... | 12/25/2007 |
| 7313379 | Generation of a self-correcting local oscillation A method and apparatus for generating a self-correcting local oscillation includes processing that begins by generating a frequency correction signal that represents undesired tones introduced by the self-correcting local oscillation. The processing continues by gen... | 12/25/2007 |
| 7310506 | Differential voltage control oscillator including radio-frequency switching circuits The present invention provides a differential voltage control oscillator including: a parallel resonance circuit in which an inductor circuit, a variable capacitance circuit, and a radio-frequency switching circuit are connected in parallel together; and a negative ... | 12/18/2007 |
| 7295824 | Frequency multiplier pre-stage for fractional-N phase-locked loops A WLAN (Wireless Local Area Network) communication device comprising a WLAN frequency synthesizer for generating a synthesizer signal suitable for modulating a transmission signal and/or demodulating a reception signal and corresponding methods and integrated circui... | 11/13/2007 |
| 7289005 | Polar modulator and a method for modulation of a signal A polar modulator contains a phase locked loop which is designed to emit a radio-frequency signal at one frequency to one output, with the frequency being derived from the reference signal and from a phase modulation signal at a control input of the phase locked loo... | 10/30/2007 |
| 7272374 | Dynamic selection of local oscillator signal injection for image rejection in integrated receivers A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signa... | 09/18/2007 |
| 7272373 | Ratiometric clock systems for integrated receivers and associated methods A ratiometric clock system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP) circuitry on the same integrated circuit as mixer and local oscillator (LO) generation circu... | 09/18/2007 |
| 7269402 | PLL circuit having a multi-band oscillator and compensating oscillation frequency A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip are... | 09/11/2007 |
| 7266357 | Reduced local oscillator feedthrough quadrature image reject mixer An RF communications circuit having a reduced LO feed through image reject mixer is disclosed. The image reject mixer includes a quadrature phase transconductance stage coupled to a quadrature phase mixer of a quadrature phase mixer module and an in-phase mixer of a... | 09/04/2007 |
| 7263340 | PLL circuit having a multi-band oscillator and compensating oscillation frequency A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip are... | 08/28/2007 |
| 7263341 | Audio demodulating circuit and television broadcast receiver An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circu... | 08/28/2007 |
| 7250824 | Voltage controlled oscillator with linear capacitance The voltage controlled oscillator comprises an amplifier and an oscillating system comprising an inductor and a first and second variable capacitor connected in series, each having a capacitance varying according to its control voltage. The capacitance of one of the... | 07/31/2007 |
| 7248844 | Radio frequency integrated circuit electo-static discharge circuit The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes an integrated circuit pin and a radio frequency (RF) ESD circuit. The integrated circuit pin provides coupling to an antenna. The RF ESD circuit is operably coupled to the i... | 07/24/2007 |
| 7242916 | Communication semiconductor integrated circuit device and wireless communication system The invention provides a communication semiconductor integrated circuit device (RF IC) capable of pulling in the frequency of a PLL circuit to a desired set frequency at high speed even in the case where a frequency settable range of the PLL circuit is wide without ... | 07/10/2007 |
| 7239713 | Wireless transmission system for hearing devices A transmission system for rearing devices is provided that, in spite of having less energy available, allows for a transmission relatively safe from interference. Such a gearing device has a self-exciting oscillation circuit as an antenna that enables an inductive c... | 07/03/2007 |
| 7239857 | Method and apparatus for compensating an oscillator in a location-enabled wireless device A method and apparatus for compensating an oscillator in a location-enabled wireless device is described. In an example, a mobile device includes a wireless receiver for receiving wireless signals and a GPS receiver for receiving GPS signals. The mobile device also ... | 07/03/2007 |
| 7236060 | Electronic pulse generator and oscillator Distributed traveling wave oscillator circuitry is disclosed. The oscillator circuitry includes a signal path, a plurality of active switching means, and a direction promoting means. The signal path is formed from a pair of adjacent conductors and exhibits endless e... | 06/26/2007 |
| 7236756 | Tuning signal generator and method thereof A front end tuning system includes a tuning signal generator. The tuning signal generator includes a digital-to-analog converter (DAC) to receive a pre-conditioned tuning signal at a reference input, to receive a digital value at a digital control input, and to prod... | 06/26/2007 |
| 7233584 | Group TDMA frame allocation method and apparatus A Group TDMA multiple destination, multiple node wireless network includes a first destination having a first group of nodes (Group 1) in communication range and a second destination having a second group of nodes (Group 2) in communication range. A th... | 06/19/2007 |
| 7221920 | Voltage controlled oscillator, frequency synthesizer and communication apparatus A voltage controlled oscillator includes a resonator configured to resonate with an initial oscillation frequency during starting period of oscillation and a steady oscillation frequency during a steady state oscillation. The resonator includes a film bulk acoustic ... | 05/22/2007 |
| 7218180 | Low noise oscillator A low noise oscillator constructed using a rotary traveling wave oscillator. The conductors of the rotary traveling wave oscillator provide at any tap position a pair of oppositely phased oscillations and these oscillations have slightly different phases at position... | 05/15/2007 |
| 7209065 | Rotary flash ADC A system and method for converting an analog signal to a digital signal is disclosed. The system includes a multiphase oscillator preferable a rotary oscillator, a sample and hold circuit, an integrator and a time-to-digital converter. The multiphase oscillator has ... | 04/24/2007 |
| 7203079 | Switching controller having frequency hopping for power supplies A switching controller having frequency hopping is used for reducing the EMI of a power supply. A pattern generator generates a digital pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of... | 04/10/2007 |
| 7184732 | PLL frequency synthesizer A PLL frequency synthesizer suitable for improving even a spurious characteristic in a lock state while ensuring a high-speed lockup characteristic to thereby implement satisfactoy communication quality includes a switch circuit interposed between a low-pass filter ... | 02/27/2007 |
| 7184283 | Switching frequency jitter having output ripple cancel for power supplies A switching frequency jitter having output ripple cancel includes a pattern generator generating a pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal in response to th... | 02/27/2007 |
| 7181180 | Sigma delta modulated phase lock loop with phase interpolation A sigma delta modulated phase lock loop reduces quantization noise by using phase interpolation to increase an effective frequency resolution of the dividing ratio of a divider. ... | 02/20/2007 |
| 7177601 | Method and apparatus for transceiving data using a bimodal power data link transceiver device A bimodal power data link transceiver device (33) is provided. The device comprises a transceiver integrated circuit (IC) (14); wherein the IC comprises an oscillator (150), a frequency reference port, and a RF output port. A VCO (12) is ... | 02/13/2007 |
| 7177611 | Hybrid control of phase locked loops A hybrid digital and analog phase locked loop. A voltage controlled oscillator is provided, having a fine tune input, a coarse tune input and an output. A frequency divider has an input connected to receive a signal provided by the output of the voltage controlled o... | 02/13/2007 |
| 7164900 | Impulse waveform generating apparatus An impulse waveform generating apparatus comprises an oscillator for generating a reference signal having a center frequency in a frequency band of an impulse to generate, a timing matching circuit for shifting a phase of the reference signal by 90 degrees, a freque... | 01/16/2007 |
| 7158767 | Tuneable frequency translator A tuneable frequency translator is disclosed having electrical circuitry mounted to a circuit board. The circuitry is designed to provide a phase-locked loop with a resonator. Compliant material is positioned between the resonator and the circuit board. Operably cou... | 01/02/2007 |
| 7155190 | DDS-PLL method for frequency sweep A high frequency sweep generator uses a DDS-PLL method for frequency sweep over wide frequency spans. A digital sweep generator produces a linear ramp signal using DDS techniques that is applied to a coarse tuning port of a high frequency tunable oscillator, such as... | 12/26/2006 |
| 7154341 | Communication semiconductor integrated circuit device and wireless communication system A communication semiconductor integrated circuit device includes an RFVCO and a TXVCO and is formed over one semiconductor substrate, and has a first operation mode (idle mode) which does not perform transmission and reception, a second operation mode (warmup mode) ... | 12/26/2006 |
| 7155176 | System for synchronizing a portable transceiver to a network A system for synchronizing a portable transceiver to a network is disclosed. Embodiments of the system for synchronizing a portable transceiver to a network include a crystal oscillator, a frequency synthesizer adapted to receive an output of the crystal oscillator,... | 12/26/2006 |
