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| Number | Title | Issue Date |
| 7961040 | Accuracy on-chip clock generator for multi-clock driven single chip solution A mixed-signal chip is described. The mixed-signal chip comprises a first portion of analog circuit and second portion of digital circuit, an on-chip precision oscillator residing on the first analog portion, the precision oscillator has a precision frequency; a fir... | 06/14/2011 |
| 7683705 | Circuit arrangement and method for matching a demodulator A circuit arrangement for matching a demodulator to operating conditions comprises a demodulator designed to demodulate an analog input signal to a demodulated signal. The demodulator is also designed to be driven by a control signal. The circuit arrangement further... | 03/23/2010 |
| 7428280 | Receiving apparatus and transceiver The present invention has a N pieces of receiving antennas, a propagation path characterization estimator, a weight generator for interference canceller, an array processing interference canceller, a weight generator for signal estimator, a signal estimator, a trans... | 09/23/2008 |
| 7421043 | Method and/or apparatus for stabilizing the frequency of digitally synthesized waveforms An apparatus comprising a first circuit, a second circuit, a third circuit and a fourth circuit. The first circuit may be configured to generate a demodulated signal in response to (i) a modulated signal and (ii) a seed value. The second circuit may be configured to... | 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 |
| 7330068 | Adjusting coefficients of a filter Demodulation apparatus includes a transversal filter characterized by coefficients adjusted by a coefficient determiner responsive to a constant modulus error signal and variable mode error signal related to the output of a spectral mean frequency detector having it... | 02/12/2008 |
| 7277688 | DC offset correction for very low intermediate frequency receiver A wireless receiver includes a local oscillator, a mixer, a band pass filter, a DC offset determination module, a DC offset correction module, a subtraction module, and a down converter. The local oscillator produces a local oscillation that a mixer uses to down con... | 10/02/2007 |
| 7260163 | Noise blanker using an adaptive all-pole predictor and method therefor A noise blanker (40, 106) monitors and removes noise from a sampled signal by adaptive filtering (98, 150) the sampled signal to generate trained adaptive filter prediction coefficients. The sampled signal is provided as an output signal when the noise... | 08/21/2007 |
| 7184730 | Automatic gain control system having a wide range of continuous gain control An automatic gain control system (100) and methods thereof for a receiver for providing a wide range of continuous gain control has been discussed. The AGC includes an input stage (120) for providing an indication of a strength of a received signal; an... | 02/27/2007 |
| 7181184 | Band edge amplitude reduction system and method A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of signals not under the power control of the receiver. For example, the r... | 02/20/2007 |
| 7170279 | Device and method for measuring angles A device for angle measurement, having at least one transducer wheel and at least one sensor, including at least one sensor element and cooperating with the transducer wheel, in which by means of the cooperation of the transducer wheel and the sensor, a pair, which ... | 01/30/2007 |
| 7164730 | Digital demodulator, a telecommunications receiver, and a method of digital demodulation A digital demodulator comprises means (14) to perform a complex frequency shift operation on the received signal so as to provide a first signal at an intermediate frequency of one quarter of the sampling frequency. The digital demodulator also comprises a qu... | 01/16/2007 |
| 7151919 | Method for forming an intermediate frequency signal in a mixer, and a mixer The invention relates to a method for forming at least two intermediate frequency signals with different phases in a mixer (1), to which a first signal (RF) and a second signal (LO) are conducted. According to the method, the first intermediate frequency sign... | 12/19/2006 |
| 7142624 | Analog unidirectional serial link architecture The present analog invention is related to a unified digital architecture comprising logic transmitter portions and logic receiver portions. A unified serial link system and method for transmitting digital data across wired media including a transmitter and a receiv... | 11/28/2006 |
| 7133476 | Apparatus and methods for suppression of interference among disparately-modulated signals Information is recovered from a composite signal including first and second component signals modulated according to respective first and second modulations, for example, 8-PSK and GMSK. The composite signal is processed based on predetermined characteristics of the... | 11/07/2006 |
| 7116963 | Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan... | 10/03/2006 |
| 7116734 | Method and system for providing maximum likelihood detection with decision feedback interference cancellation A method for providing maximum likelihood detection with decision feedback interference cancellation is provided. The method includes estimating a current symbol with previous symbol interference (PSI) removed based on estimated previous symbols. A next symbol is es... | 10/03/2006 |
| 7099647 | Single chip direct conversion transceiver for reducing DC offset and method of manufacturing the same A single chip direct conversion transceiver that includes a substrate on which a mixer unit and a local oscillator are provided as a circuit, and a positive hole formed between the mixer unit and the local oscillator and filled with a conductive plug to block signal... | 08/29/2006 |
| 7095799 | Systems and methods for providing baseband-derived predistortion to increase efficiency of transmitters Systems and methods for providing baseband predistortion within a transmitter. In a simplified embodiment, the transmitter contains a main signal path that receives an input signal and generates a main signal in response thereto. A filter in the main signal path is ... | 08/22/2006 |
| 7038531 | Active filter An active filter comprising a first operational amplifier (10) disposed in an inverting integral configuration through a feedback capacitor (14) and a main resistor (15), and a divider (20) connected through a first connecting terminal ( | 05/02/2006 |
| 7024608 | Transmitting method and transmitting apparatus Ideal nonlinear distortion compensation is realized by removing an imperfection of amplitude delay characteristic and an affection of inherent deviation that an amplifier has. A linear distortion compensation factor calculating part (18) estimates, based on q... | 04/04/2006 |
| 7006806 | System and method for SAP FM demodulation Certain embodiments of the present invention provides a system and method for SAP FM demodulation. The system includes a bandpass filter for isolating the SAP signal, a Hilbert filter to produce a copy of the SAP signal phase shifted by 90 degrees, an FM demodulator... | 02/28/2006 |
| 6993107 | Analog unidirectional serial link architecture A unified serial link system and method for transmitting digital data across wired media including a transmitter and a receiver. The system comprises a phase locked loop (PLL) control circuit, a phase rotator circuit, a phase buffer circuit, and an equalization driv... | 01/31/2006 |
| 6985029 | Circuit configuration for tolerance correction in a frequency demodulator A demodulator has a resistor and a capacitor that may be subject to tolerances. For tolerance correction, the FM demodulator is preferably supplied with a reference frequency, which corresponds to the nominal mid-frequency of the demodulator, which is a function of ... | 01/10/2006 |
| 6980785 | Direct conversion wireless receiver with digital phase equalization A direct conversion receiver (DCR) with a pair of quadrature conversion paths. Each of the quadrature conversion paths receives an RF input signal and converts the RF input signal to a digital baseband signal. The quadrature conversion paths each include a mixer mix... | 12/27/2005 |
| 6977545 | FM signal receiver and wireless communications device using same An FM signal receiver for use in receiving a burst signals as in a Bluetooth system includes a BPF and a frequency-demodulation circuit, each having, for example, a phase shifter, which is constructed from similar or related circuitry so as to enable adjustment of t... | 12/20/2005 |
| 6972617 | FM demodulator including a DC offset detector An FM demodulator has a differential output demodulator for receiving an FM signal and for outputting a positive differential signal and a negative differential signal of a demodulated signal of the FM signal, a DC offset detector electrically connected to the diffe... | 12/06/2005 |
| 6969984 | Direct phase and frequency demodulation The present invention, generally speaking, provides a time shift angle demodulator that is of simple construction and has an extended linear range. Range extension is achieved by using the input signals directly, not simply post-processing the S-PFD outputs. In acco... | 11/29/2005 |
| 6950479 | DC offset compensation A method of estimating a DC offset value of a signal includes estimating a DC offset value of a preamble part of the signal using a pair of diodes (D1, D2) and a resistor (R) connected in parallel. During receipt of the data part of the signal, the dio... | 09/27/2005 |
| 6943847 | FM demodulator for SECAM decoder A SECAM decoder and an FM modulator therefor are disclosed, in which a demodulated color signal is provided to indicate deviations in the frequency of modulated color information from a nominal subcarrier frequency. The demodulator comprises numerator and denominato... | 09/13/2005 |
| 6724247 | FM demodulator having DC offset compensation An FM demodulator compensates for DC offset by detecting the positive peak value of the frequency demodulated signal (D1, C2, R1) and the negative peak value of the frequency demodulated signal (D2, C3, R2). The mean of the ... | 04/20/2004 |
| 6664849 | Digital FM demodulator performing amplitude compensation A digital FM demodulator converts a digital FM input signal to a demodulated signal, detects the amplitude of the digital FM input signal, generates a corresponding amplitude signal, and adjusts the amplitude of the demodulated signal according to the amp... | 12/16/2003 |
| 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 |
| 6573782 | Sigma delta FM ratio detector A circuit (100) for generating a ratio signal indicating a ratio of frequency error to signal magnitude of an input signal includes an FM ratio detector (110) and a sigma-delta analog-to-digital converter (130). The FM ratio detector (110) is responsive t... | 06/03/2003 |
| 6487240 | Apparatus for receiving and recovering frequency shift keyed symbols A receiver architecture includes a selectivity filter (206) for selectively passing a wanted channel and rejecting unwanted channels. The selectivity filter has a filter BT of about one-half the BT of the transmitter filter. A discriminator (208) is coupl... | 11/26/2002 |
| 6456673 | Digital radio frequency interference canceller Disclosed are radio frequency (RF) interference cancellation techniques that effectively estimate RF interference to the data signals being received using a frequency domain model, and then remove the estimated RF interference from the received data signa... | 09/24/2002 |
| 6456950 | Method and apparatus for estimating and digitizing instantaneous frequency and phase of bandpass signals The present invention is a method and apparatus to detect an instantaneous frequency of an input signal. A sampler samples the input signal to generate a sampled signal. A metric generator is coupled to the sampler to generate a metric signal based on the... | 09/24/2002 |
| 6393068 | Communication channel and frequency offset estimator Estimates of both the communication channel impulse response coefficients and a received signal carrier frequency offset are generated simultaneously without either estimation interfering with or hampering of the other estimation. This is realized in an e... | 05/21/2002 |
| 6304136 | Reduced noise sensitivity, high performance FM demodulator circuit and method An FM demodulator circuit with reduced sensitivity to noise and performance nearly identical to theoretical predictions. The FM demodulator is a time sampled detector for binary shift key (BFSK) modulated signals. Its inputs are an in-phase and a quadratu... | 10/16/2001 |
| 6295015 | Reference generator for demodulator calibration A reference generator includes a memory that stores reference data which, when clocked out of the memory, produces an ATSC compliant VSB reference signal substantially free of sub-harmonics of the clock signal. A digital-to-analog converter converts the c... | 09/25/2001 |
