Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7362799 | Method and apparatus for communication signal resolution Embodiments of the present invention provide methods and apparatuses for determining a parameter value for each of a plurality of communication signals received concurrently as a composite signal. The parameter value of each communication signal is within a correspo... | 04/22/2008 |
| 7289781 | Device for receiving digital signals A device for receiving digita1 signals comprising at least one receiving antenna for receiving signals, a measuring means for determining parameters of relevance to signal quality of signals received by the antenna, and a digitizer for the signals received by the an... | 10/30/2007 |
| 7262650 | Amplitude adjusting circuit An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third... | 08/28/2007 |
| 7107036 | Demodulator architecture and associated methods Embodiments of a frequency modulated (FM) demodulator and associated methods are generally described. According to but one example embodiment, an apparatus is disclosed comprising a receiver front-end, to receive a signal from one or more antenna(e) and generate qua... | 09/12/2006 |
| 6931513 | Data converter with statistical domain output An integrated circuit having statistical processing capability. The integrated circuit has an input for receiving input data in a first data domain. A data converter is provided for converting received input data from the first domain to a second domain different fr... | 08/16/2005 |
| 6850190 | Combined beamforming-diversity wireless fading channel demodulator using adaptive sub-array group antennas, signal receiving system and method for mobile communications A wireless fading-channel demodulator using adaptive sub-array group antennas to combine beamforming and diversity gain, a signal receiving system and method for mobile communications using the wireless fading-channel demodulator. The wireless fading-channel demodul... | 02/01/2005 |
| 6809584 | Signal transmission and receiving methods optimized for integrated circuit implementation A demodulator for demodulating a modulated input signal transmitted at a carrier frequency includes a current mirror for receiving the modulated input signal and generating a first and a second current-mirror output signals of same amplitude and frequency as the mod... | 10/26/2004 |
| 6744827 | Demodulator arrangement, method to demodulate, and telecommunication system comprising such a demodulator arrangement A demodulator arrangement, suitable to demodulate data symbols modulated in accordance with a predefined constellation diagram and sent as part of information bursts (A1, B1, C1, D1, A2, B2, C2, D2) over a tran... | 06/01/2004 |
| 6668032 | Device and method for signal sampling at multiple clock rates A network receiver is configured for receiving a modulated carrier signal representing a data frame from another network transceiver via a network medium, the modulated carrier signal may be either a pulse position modulated (PPM) carrier, a quadrature am... | 12/23/2003 |
| 6483381 | Signal transmission and receiving methods optimized for integrated circuit implementation This invention discloses a demodulation method. The method includes steps of: A) Receiving a modulated input signal having an input signal frequency. B) Generating a first switch control signal at a first switching frequency substantially equal to the inp... | 11/19/2002 |
| 6046629 | Method of an apparatus for demodulating amplitude-modulated signals in an amplitude phase shift keying (APSK) system In a demodulating method of demodulating amplitude-demodulated signals in an amplitude phase shift keying system for conducting an amplitude modulation by setting signal points as information codes on a complex plane representing a signal space of transmi... | 04/04/2000 |
| 5732337 | Reconfigurable mixer-filter-decimator A digital mixer-filter-decimator (MFD) is disclosed which is reconfigurable so that it can be used in both modes of operation of a dual mode receiver such as an AM/FM receiver. In either mode of operation the MPD performs filtering and decimation operatio... | 03/24/1998 |
| 5614862 | Digital demodulator for a frequency modulated signal and an amplitude modulated signal A DMUX 11 outputs data in a digital FM signal in a circulation to produce signals S1 to S4. An MUX 14 alternately outputs inverted signals of the signals S1 and S3, obtaining a signal Si.sub.(k). An MUX 15 alternately outputs inverted signals of the signa... | 03/25/1997 |
| 5602868 | Multiple-modulation communication system A multiple-modulation communication system includes a transmitter that modulates and transmits communication signals modulated by a first modulation technique and communication signals modulated by a second modulation technique. The first modulation techn... | 02/11/1997 |
| 5554955 | Method and apparatus for removing the effects of co-channel interference from the message on a dominant frequency modulated carrier and for recovering the message from each of two co-channel carriers Method and apparatus for improving an estimate of a message being carried by a frequency modulated dominant carrier in the presence of co-channel interference from a subdominant carrier. An envelope detector provides an envelope signal E(t). A frequency d... | 09/10/1996 |
| 5206601 | Order statistic signal processor for estimating values of signal parameters and demodulating amplitude-, phase-, and frequency-modulated signals The order statistic signal processor obtains continuing estimates of amplitude, phase, or frequency of an input signal based on order statistics. By way of definition, the P'th order statistic for a set of samples from a continuously distributed process i... | 04/27/1993 |
| 5121072 | Digital demodulator for amplitude or angle modulation using truncated nonlinear power series approximations A digital demodulator for demodulating baseband signals in a radio receiver. The demodulator includes a digital signal processing module for forming a mathematical series adapted for generating demodulation functions. The selection of coefficients for thi... | 06/09/1992 |
| 4677690 | Baseband demodulator for FM and/or AM signals A demodulator of the type employed in a "zero-IF" system uses a local oscillator for providing quadrature output signals at the center frequency of a received signal to be demodulated. The demodulator has first and second mixers for separately mixing the ... | 06/30/1987 |
| 4599743 | Baseband demodulator for FM and/or AM signals A demodulator of the type employed in a "zero-IF" system uses a local oscillator for providing quadrature output signals at the center frequency of a received signal to be demodulated. The demodulator has first and second mixers for separately mixing the ... | 07/08/1986 |
| 4577157 | Zero IF receiver AM/FM/PM demodulator using sampling techniques Apparatus is depicted which enables the sampling of the phase angle of a modulated signal and manipulates the sample signals to demodulate the same. The apparatus is particularly adaptable for use in demodulating the I and Q channel signals of a zero IF r... | 03/18/1986 |
| 4521749 | Simultaneous amplitude and angle modulation using detection of complex zeroes Modulation of a carrier signal using both amplitude and angle modulation increases the information capacity of transmission without increasing bandwidth. Complex zeros in an amplitude modulating signal are detected and a conjugation function dependent on ... | 06/04/1985 |
| 4470147 | Radio receiver with quadrature demodulation and digital processing A multi-mode radio receiver divides the radio frequency input into two channels and in each channel mixes it with the carrier wave frequency. A quadrature shift in the mixing carrier wave frequencies enables base band signals to be filtered from the mixer... | 09/04/1984 |
| 4430747 | Receiving apparatus for stereophonic broadcast having amplitude and angle modulated signal components A receiver for demodulating a stereophonic broadcast signal. Envelope detection is provided for a preselected radio frequency broadcast signal. Angle demodulation of a difference signal contained in the broadcast signal is provided at the radio frequency ... | 02/07/1984 |
| 4340782 | Circuit for demodulating amplitude and angle modulated broadcast signals A superheterodyne receiver is described for demodulating signals containing both amplitude and angle modulation components. An intermediate frequency signal is produced which is simultaneously amplitude detected as well as angle demodulated. Detector mean... | 07/20/1982 |
| 4324952 | Direct function receivers and transmitters for multichannel communications system Transmitters and receivers are disclosed for communicating composite modulated signals including at least two modulated components. The transmitters include phase and envelope operators (54, 56) which generate the phase and envelope portions of the compos... | 04/13/1982 |
| 4300020 | Method and apparatus for eliminating pilot signal components from stereo demodulated signals A pilot signal cancelling signal is first combined with a composite stereo signal by a first predetermined ratio and thus a combined signal is fed to a stereo demodulator (3A) which produces a difference signal and an inverted difference signal, while the... | 11/10/1981 |
| 4255815 | Electronic switching for AM-FM radio An integrated circuit, when operated from a simple single-pole-double throw switch, performs all of the functions required to switch modes in an FM-AM radio. The radio frequency circuits are switched directly and, in response to the AM oscillator circuit ... | 03/10/1981 |
| 4201946 | AM-FM Detector circuit stabilized against fabrication and temperature variations A detector circuit for detecting AM and FM signals adapted particularly for integrated circuit fabrication which has a circuit configuration that provides highly stable operating characteristics for both AM and FM operation and is responsive to an increas... | 05/06/1980 |
| 4160955 | Compatible AM-FM frequency discriminator A compatible AM-FM frequency discriminator for deriving an FM demodulated output and AFC outputs for FM and AM waves from an FM demodulator employing a quadrature detecting circuit which has connected thereto a phase shifter group composed of a series cir... | 07/10/1979 |
| 4147986 | AM-FM receiver An AM-FM receiver has switching elements such as field effect transistors inserted in a signal path of the FM circuit. A switch for applying bias voltage to the AM or FM front end circuit is arranged to operate synchronously with switching of the bias vol... | 04/03/1979 |
| 4070628 | Radio receiver with selective plural band reception A radio receiver consisting of a radio receiver circuit capable of the reception of one band such as the AM band and one or more adapters capable of the reception of other bands such as the FM band, the radio receiver circuit and the adapter housed in the... | 01/24/1978 |
| 4001702 | High speed FM and AM demodulator A high speed arrangement for simultaneously demodulating the AM and FM information coming in on a tone frequency carrier. In the case of the incoming tone signal being only FM modulated, the FM demodulator extracts the data whereas the AM demodulator prov... | 01/04/1977 |
| 3999138 | Detector for AM-FM signals A detector for AM or FM signals is described. The detector employs a differentially connected emitter follower pair to which an in-phase and a phase-shifted signal are respectively applied. The emitter follower pair produces an output waveform with contro... | 12/21/1976 |
| 3990016 | Asynchronous demodulator Phase detectors in quadrature whose outputs are simultaneously coupled to: high pass networks and cross coupled multipliers with the output summed to produce a signal proportional to the frequency difference of the signals applied to the aforesaid phase d... | 11/02/1976 |
| 3983485 | Multi-phase and multi-amplitude level modulator and modulation and demodulation methods A multi-phase, multi-amplitude level modulation method, and modulator, is provided which produces a three-level, ten-phase modulated carrier. The carrier is modulated in three amplitude levels, viz., off, intermediate and high and in ten phase positions, ... | 09/28/1976 |
| 3971988 | AM/FM receiver using spectral parameter estimators An AM/FM receiver which demodulates radio signals by computing estimates of spectral parameters of the radio signals. Three spectral parameter estimation circuits are selectively formed from a number of shared circuits according to the type of modulation ... | 07/27/1976 |
| 3936750 | AM-FM receiver having improved bias supply circuit The present invention relates to an AM-FM receiver of the superheterodyne variety having a novel bias supply circuit wherein a common filter capacitor may be used for the bias supply, the AGC function in AM operation, and the AFC function in FM operation.... | 02/03/1976 |
