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| Number | Title | Issue Date |
| 8183915 | Oscillator, and receiving device and electronic device using the oscillator An oscillator unit is configured such that a frequency adjustment unit of a synthesizer used by a controller is smaller than a frequency variation tracking capability of a demodulator connected to an output side of a frequency converter. This structure successfully ... | 05/22/2012 |
| 8040178 | Oscillator, and receiving device and electronic device using the oscillator An oscillator unit is configured such that a frequency adjustment unit of a synthesizer used by a controller is smaller than a frequency variation tracking capability of a demodulator connected to an output side of a frequency converter. This structure successfully ... | 10/18/2011 |
| 7863974 | Selectable intermediate frequency demodulator A method and apparatus for demodulating an input signal in a selectable intermediate frequency system is disclosed. The apparatus includes a front end module, a filter, and a phase lock loop (PLL). The front end module mixes the input signal with an oscillating sign... | 01/04/2011 |
| 7791408 | Method and apparatus for automatic frequency correction A method and apparatus for automatic frequency correction in a demodulation circuit. The apparatus includes a demodulator, a frequency offset estimator, a frequency controller, and an oscillator. The oscillator provides a receiver clock signal which the demodulator ... | 09/07/2010 |
| 7598803 | Combined phase-locked loop and amplitude-locked loop module for switching FM signals A combined PLL and ALL module for switching FM signals includes a PLL unit and an ALL unit electrically connected therewith. The PLL unit is used to initially process FM signals received from a co-channel. Outputs of the PLL unit are sent to the ALL unit and process... | 10/06/2009 |
| 7443930 | Complex digital phase locked loop for use in a demodulator and method of optimal coefficient selection A complex digital phase locked loop for use in a digital demodulator includes a phase detector for producing a phase error indicative of a difference in phase between a complex digital input signal and a complex digital feedback signal. The phase error is input to a... | 10/28/2008 |
| 7421053 | Fast clock acquisition enable method using phase stir injection to PLL for burst mode optical receivers Systems and methods for aligning the phase of a PLL with an incoming data signal. In one embodiment, when a data signal is received in a PLL, a phase perturbation signal is generated and injected into the PLL. The PLL then performs a phase alignment procedure to loc... | 09/02/2008 |
| 7420409 | Phase locked loop demodulator with gain control The invention relates to a demodulator to demodulate frequency-modulated signals FM including a phase locked loop PLL including at least a phase detector, a loop filter and a voltage controlled oscillator function VCO′, characterized in that said voltage controlle... | 09/02/2008 |
| 7408418 | Phase locked loop circuit having reduced lock time A phase locked loop circuit comprising a phase detector having a first input for receiving a first frequency signal and an output, a first filter adapted to filter the output electric signal of the phase detector, a voltage controlled oscillator adapted to generate ... | 08/05/2008 |
| 7339809 | Systems and methods for electrical power regulation and distribution in aircraft The present invention comprises systems and methods for electrical power regulation and distribution. In an embodiment, a system includes a modulator coupled to the source that receives an unregulated output waveform and is operable to produce a first composite wave... | 03/04/2008 |
| 7337356 | Systematic and random error detection and recovery within processing stages of an integrated circuit An integrated circuit includes a plurality of processing stages each including processing logic 1014, a non-delayed signal-capture element 1016, a delayed signal-capture element 1018 and a comparator 1024. The non-delayed signal-capture e... | 02/26/2008 |
| 7321801 | Automatic gain adjustment device and automatic gain adjustment method An automatic gain adjustment device and method capable of accurately adjusting a gain with a simple structure. In an automatic gain adjustment method of a feedback control system that uses a phase difference between an output signal obtained from a controlled object... | 01/22/2008 |
| 7254195 | Apparatus, methods and articles of manufacture for dynamic differential delay correction The invention is directed to a system for dynamically correcting an electromagnetic wave by processing two or more aspects of the electromagnetic wave along two or more separate signal paths; comparing an expected value for at least one of the aspects of the electro... | 08/07/2007 |
| 7218178 | Frequency generator with a phase locked loop A frequency generator with a phase locked loop includes a loop filter, the transfer function of which has a pair of complex conjugated poles. The present invention provides an optimum and greatly improved compromise, in particular as opposed to the prior art, betwee... | 05/15/2007 |
| 7215215 | Phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus A phase modulation apparatus is provided whereby excellent RF phase modulation signals can be obtained even when the modulation sensitivity of a voltage controlled oscillator varies. Phase modulation apparatus 100 has: phase detector 105 that performs ... | 05/08/2007 |
| 7196537 | Integrated circuit An integrated circuit includes a circuit component, a first control circuit and a switchable resistance network. An input voltage is fed to the circuit component on the input side. A control signal generated by the first control circuit is fed to the control termina... | 03/27/2007 |
| 7187727 | Clock and data recovery circuit and clock control method To provide a clock and data recovery circuit which facilitates alteration of the frequency range and adjustment of characteristics. The clock and data recovery circuit includes a phase shift circuit 101 having a switch receiving as inputs multi-phase clocks f... | 03/06/2007 |
| 7148754 | Self-tunable phase lock loop The present invention provides a method and an apparatus for selectively pretuning and updating a phase lock loop, deployed in an integrated circuit including an agile radio, such as a wideband or an ultra wideband frequency agile radio in a telecommunication system... | 12/12/2006 |
| 7138857 | Signal processing device for mobile radio A signal processing device includes a conversion device configured to output a differential current signal at two taps on the basis of an input signal and an oscillator signal. A respective controllable current source is coupled to one of the two taps. An amplificat... | 11/21/2006 |
| 7127010 | Oscillator controlling A receiver local oscillator is always tuned to a frequency that lies within a range of reception frequencies of the receiver. The oscillator is tuned to a frequency less than and above the received frequency when the received frequency is above and below a threshold... | 10/24/2006 |
| 7103186 | Stereo/two-tone demodulator In a stereo/two-tone demodulator for demodulating an intermnediate-frequency signal having stereo or two-tone sound signals modulated on a first and a second sound carrier, the second sound carrier having a lower amplitude than the first sound carrier, ceramic filte... | 09/05/2006 |
| 7084615 | Performance measurement of device dedicated to phase locked loop using second order system approximation A method, system and program product to measure performance of a device dedicated to a phase locked loop (PLL). A resistor-inductor-capacitor (RLC) model is produced to simulate the PLL. The RLC model and the device to be measured are mapped together into a test cir... | 08/01/2006 |
| 7071773 | Digital phase locked loop The invention relates to a digital phase locked loop (PLL) 12 for demodulating an intermediate frequency signal. The digital phase locked loop 12 comprises two coordinate rotation digital computers 24 and 30 in its phase detector. The rob... | 07/04/2006 |
| 7062165 | Receiver monitoring and optimization using forward error correction information A data regenerator for regenerating a data signal, including a convertor for converting a received data signal into a binary data signal in dependence on conversion parameters, an error corrector for correcting errors in the binary data signal based on error correct... | 06/13/2006 |
| 7058360 | Method and system for stabilizing the performance variation of a radio frequency device A method for stabilizing the performance variation of a primary radio frequency (RF) device is provided that includes providing a secondary RF device. An output signal is generated with the secondary RF device. The output signal is provided to a feedback circuit. A ... | 06/06/2006 |
| 7050778 | Direct conversion turner A direct conversion tuner down-converts television signals, cable signals, or other signals directly from an RF frequency to an IF frequency and/or baseband, without an intermediate up-conversion step for image rejection. The direct conversion tuner includes a pre-s... | 05/23/2006 |
| 7020229 | Phase-locked loop A phase-locked loop is described and has a phase detector that provides at its output per clock cycle a current pulse whose pulse duration is a measure of a phase difference between an input signal and an output signal of the phase-locked loop. A loop filter is conn... | 03/28/2006 |
| 7020890 | Millimeter wave transmitter, millimeter wave receiver and millimeter wave communication system enabling simplification of wiring and improvement in degree of freedom for setting receiver in receiving system for terrestrial broadcasting and satellite broadcasting In order to receive satellite broadcasting (BS and CS) and terrestrial broadcasting (VHF and UHF), complicated wiring is required in a personal residence for transmitting broadcasting signals to a plurality of TV receivers while new distributors must be additionally... | 03/28/2006 |
| 7006846 | Credit card communication system A system for long range communications is disclosed. The system includes a base station and credit card sized wireless long range communications devices. The wireless long range communication devices each include a transceiver, a man machine interface (e.g., display... | 02/28/2006 |
| 7007220 | Error correction coding across multiple channels in content distribution systems Error correction coding across multiple channels is provided in multi-channel transmission systems. Specifically, redundancy is provided by selecting a portion of original data from each of a plurality of original channels, performing at least one encoding operation... | 02/28/2006 |
| 7002639 | Dual digital television tuner A dual digital television tuner includes first and second direct conversion circuits, each having a pair of mixers and a local oscillator, in which a digital television signal is input to the pair of mixers, which directly output baseband signals. The first direct c... | 02/21/2006 |
| 6978125 | Methods and apparatus for tuning pre-selection filters in radio receivers A tuning arrangement in a radio receiver includes a front-end circuit having a tunable band-pass filter that is capable of tunably selecting channels within at least one frequency band of an RF signal. A noise source coupled to an input of the tunable band-pass filt... | 12/20/2005 |
| 6937717 | Low power signal detection The present invention provides a low power method and apparatus for detecting a signaling tone. The apparatus comprises a resonator which can be configured to resonate at a specified frequency, a controller for configuring the resonator, and a comparator for compari... | 08/30/2005 |
| 6912381 | Processing received signals A method and circuitry for a receiver are disclosed. In the method a signal is received in a signal processing path of the receiver. Direct voltage that is present in the received signal is reduced by compensation means (12). The amplitude of the signal is at... | 06/28/2005 |
| 6809585 | Frequency modulation system and method A frequency modulation system is disclosed which includes a voltage-controlled oscillator (VCO) 43 and a phase detector 47 configured to receive an output signal from the VCO. The phase detector is arranged to output an error signal representing the ph... | 10/26/2004 |
| 6765435 | Phase locked loop demodulator and demodulation method using feed-forward tracking error compensation In embodiment, the present invention is directed to a PLL phase demodulator that utilizes feed-forward error correction. The feed-forward error correction may occur by calibrating an equalizer to possess transfer function that emulates the modulation response curve ... | 07/20/2004 |
| 6757336 | Device and method for performing a carrier recovery A method of receiving a signal and performing a carrier recovery, the method comprising the steps of: (a) receiving a signal Xk. (b) rotating Xk by a previous correction angle θk−1 to generate a rotated signal Qk, wherein the rotation is based upon a sine and cos... | 06/29/2004 |
| 6731698 | Quadrature demodulation circuit capable for canceling offset When a clock reproduction circuit (6) is locked, a phase comparator (9) detects a level difference ΔE between a zero crossing point and a true 0 level. The level difference ΔE represents an offset level and is output as an offset detection signal. Af... | 05/04/2004 |
| 6646500 | Integrated circuit having an FM demodulator and method therefor A digital FM demodulator employs a baseband phase lock loop (BBPLL), which is particularly effective for long range reception, for combining and demodulating a pair of signals represented by the mathematical expression A(t)ejθ(t) to result in ... | 11/11/2003 |
| 6614841 | Signal processing apparatus A reproduced signal is adaptively equalized in an adaptive equalizer after going through an AD converter. The AD converter, the adaptive equalizer, a phase error detector, a phase shifter, a DA converter, a loop filter, and a variable frequency oscillatio... | 09/02/2003 |
