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WO/2000/019612A1 |
The present invention includes a Voltage Controlled Oscillator (VCO) having a resonant circuit capable of being quickly switched between two resonant frequencies in order to generate two different LO frequencies. In a preferred embodimen...
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WO/2000/014872A1 |
The invention relates to a radio receiver device having a tuning stage (2, 3) that can be varied with a tuning signal (V¿T?) and is connected to a receiving antenna (1), a frequency converting stage (5) with a mixer oscillator (6) that ...
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WO/2000/014881A1 |
A method of easily controlling the free-running frequency of a voltage-controlled oscillator. A single-shot circuit (24) generates a signal of accurate pulse width by using the signal output from a reference oscillator in a frequency syn...
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WO/2000/014972A2 |
An AFC (Automatic Frequency Control) device and a method of controlling reception frequency in a dual-mode terminal. When a dual-mode terminal uses one or two AFC circuits (151), time required for acquiring tracking synchronization in a ...
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WO/2000/014553A1 |
An apparatus and method for generating an accumulated phase measurement (406) of a communication signal over a predetermined time interval. A frequency estimate of the signal is generate (402); the frequency estimate is then converted to...
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WO/2000/011925A2 |
The invention relates to a circuit for frequency synthesis, modulation and AFC, wherein said functions are carried out digitally. The basic aim of the invention is to subdivide the functions channel adjustment (over a broad frequency ran...
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WO/2000/011783A1 |
In a tunable band-pass circuit, comprising a double-tuned tank circuit having a first terminal (T1) coupled (C1) to an input terminal (I) and a second terminal (T2) coupled (Lo) to an output terminal (O), and an image trap capacitance (C...
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WO1999057808A9 |
A control device can automatically tune an external or auxiliary input signal to the frequency currently being received by a target receiver. Therefore the control device uses noise from a target receiver to tune the auxilary signal to t...
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WO/2000/008480A2 |
The present invention provides a broad band, multi-band radar detector which may be configured so as to have two or three down conversion stages. There are three mixers in the circuit, the second of which has a frequency synthesized loca...
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WO/2000/008548A1 |
A remote control device for a home theater has a macro creation/editing mode with authoring tools on the remote's GUI. One of the editing tools lets the user move a selected macro step visibly up or down the list of steps on the GUI.
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WO/2000/003482A1 |
The invention to which this application relates is to provide a means for use in electrical and electronic apparatus, such as apparatus for the receipt of television signals in either analogue or digital form, and to allow components wit...
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WO/2000/003538A1 |
A tuning device (10) employs switchable tuning circuits (20, 24, 30, 34) each of which includes a switched tuning matrix comprised of a plurality of micro-electronic electro-mechanical switches and an array of capacitors and/or inductors...
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WO/2000/001147A1 |
A television receiver, such as a video recorder, for example, is known to contain an infrared transmitting diode which enables a satellite receiver to be driven. In this case, it is disadvantageous that the user has to programme his vide...
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WO/2000/001103A1 |
A desirable operating condition is maintained in a communication device (100) that is operating in an undesirable environment by reducing the number of radio frequency signals being amplified and subsequently transmitted by the communica...
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WO/1999/065142A2 |
Until now, a switched 2-band concept of a mixer oscillator stage has been developed independently of a 3-band concept. The invention provides a mixer oscillator stage which can be used both with the switched 2-band concept and the 3-band...
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WO/1999/065143A1 |
A remote control (1) of the type used for remotely controlling parameters on a television or Hi Fi set, such as sound, is adapted to be connected to a telephone (4), the remote control (1) incorporating switch means (12) for switching on...
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WO/1999/062195A1 |
To effectively suppress harmonics in a dual band mobile phone with a power amplifier (10) outputting transmitting signals for different frequency bands (GSM; PCS, DCS) via a single output as described a power amplifier output circuit in ...
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WO/1999/062287A2 |
A remote control device (1) is disclosed for controlling a 'Web-TV'. The device has a first keypad (5) for controlling the conventional TV and VCR functions. The normal TV and VCR control commands are transmitted through a top-LED (7) in...
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WO/1999/060734A2 |
The invention relates to a radio or television receiver for receiving a plurality of signals, comprising selection means for selecting a selected signal and identifying means for assigning an identity to each signal, e.g. a preset number...
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WO/1999/059256A1 |
A single chip superheterodyne AM receiver is disclosed herein. Pin count may be 4 or more. The receiver is a OOK (ON-OFF keyed) Receiver IC for remote wireless applications. This device is an 'antenna-in, data-out' monolithic device. All...
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WO/1999/059239A1 |
A method (100) for mechanically tuning a VCO that has a resonant stripline having vias in predetermined locations connected through a circuit board to ground. This includes a step (104) of measuring the operating frequency of the VCO. A ...
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WO/1999/057809A1 |
A circuit using amplification stages (VS1, VS2) with MOS tetrodes (SE1, SE2) to switch the ranges between various bands (UHF, VHF) in television receivers, whereby the operating point of said tetrodes is easy to adjust. The MOS tetrodes ...
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WO/1999/056145A1 |
Satellite ephemeris data, received from SPS satellites in view of the particular SPS reference receiver. A plurality of digital processing system are coupled to the communication network to receive the satellite ephemeris data which is t...
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WO/1999/056395A1 |
The invention is aimed at detecting the dependence of oscillation frequency on temperature during perfect operation of the automatic frequency corrector (AFC), storing information relevant thereto and using said information in phases in ...
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WO/1999/056143A1 |
A system and method for processing in a distributed manner satellite position system (SPS) information. In one example of the invention, a first mobile SPS receiver receives SPS signals from a plurality of SPS satellites and transmits a ...
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WO/1999/054807A1 |
A graphical user interface 'touch screen' having an entire collection of icons displayed at a scale in which the individual function of each icon is recognizable, but too small to easily access features of the function, and wherein upon ...
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WO/1999/054998A1 |
The present invention concerns a digital signal tuning apparatus (9) which includes an offset frequency correction system (919). In the offset frequency correction system, searching for an offset signal starts from an end point of a band...
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WO/1999/049581A2 |
During an automatic scanning of an AM frequency band it is required that the scanning is only stopped when a usable audio signal is received. To achieve this normally the receiver checks the (RF) signal level and the IF frequency of the ...
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WO/1999/049575A2 |
A reduced-complexity automatic frequency control (AFC) loop to match the frequency of a receiver to that of a transmitter. A received input signal is multiplied with the sine and cosine signals of a voltage-controlled-oscillator, digitiz...
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WO/1999/049662A2 |
Upon installation of a broadcast receiver, for example a television receiver, the different tuning frequencies/channel numbers are to be stored in a memory of the broadcast receiver. To facilitate the installation, the network provider t...
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WO/1999/049652A1 |
An apparatus, particularly a display, which can be easily controllable by any one of two or more types of remote controllers, for instance, remote controllers of different manufacturers, while suppressing the cost increase as much as pos...
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WO/1999/049568A1 |
A demodulator circuit for demodulating a frequency modulated input signal comprises detector means (14) which are operable to produce a demodulated signal from an incoming frequency modulated signal, tuning means (19) connected to the de...
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WO/1999/048201A2 |
A tuner for example for a television receiver, comprises a UHF and a VHF section and a mixer oscillator stage. It is known that the VHF frquency band has to be splitted in at least two parts to handle the VHF signals. The invention propo...
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WO/1999/046930A1 |
A method for compatibly tuning a video signal receiver to an image processing device involves generating (47) a prompting message for display to prompt a user to initiate a command response. First and second signals are generated (20). E...
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WO/1999/045636A1 |
A front end circuit for an RF dual band GSM/DCS phone includes a first channel including an elliptical high-pass filter, a first SAW filter, and a low noise amplifier and a second channel including a second SAW filter and a second low no...
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WO/1999/043085A1 |
In a communication system including at least one transmitter and at least one receiver, a frequency synchronization signal transmitted from the transmitter to the receiver is detected. An in-phase component of a signal received by the re...
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WO/1999/041842A1 |
The invention relates to a tuning method used in a base station which comprises, in addition to at least one transceiver unit generating signals, a filtering means (30) which is separate from the transceiver unit and filters signals whic...
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WO/1999/040679A1 |
A signal having a substantially uniform spectral distribution, e.g., a flat noise signal such as a signal ground, is provided at the input of a bandpass filter such as an IF filter of a receiver circuit, to thereby produce an output sign...
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WO/1999/039447A2 |
A tuner comprising an oscillator, dividing means for dividing the oscillator signal and a mixer, suitable for global tuner applications, i.e. USA / Europe / Japan without any hardware change. The tuner comprises dividing means for dividi...
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WO/1999/033217A2 |
A method for estimating a frequency error in a communication system, in particular in a mobile communication system, in which method sample sets are successively sampled from a signal (2) to be received at given points (b¿1n?, b¿2n? an...
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WO1999026338B1 |
In a communication system including at least one transmitter and at least one receiver, a frequency offset between a carrier frequency of the transmitter and a local frequency reference of the receiver is estimated. A phase difference is...
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WO/1999/030420A1 |
A frequency synthesizer is presented comprising RF mixer means, and local oscillator means coupled to the RF mixer means. The local oscillator means comprises local oscillator mixer means coupled to the RF mixer means as well as band and...
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WO/1999/030417A1 |
An antenna tuning apparatus for VHF/UHF antenna comprises an automatic gain control (AGC) arrangement, including an amplifier, the gain of which is controlled by the AGC arrangement, and a plurality of impedance matching networks which a...
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WO/1999/030385A1 |
A wide-band self-tuning antenna system for the reception of VHF/UHF signals includes planar antenna elements located on both the surfaces of a printed circuit board and a tuner unit which includes a plurality of matching networks for the...
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WO/1999/030424A2 |
A transmitter in which a complex low IF digitised signal is applied in quadrature to a complex phase comparator (32) together with a digitised frequency down-converted version of an analogue signal produced by a transmitter VCO (46). The...
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WO/1999/030416A1 |
An apparatus and method to obtain a high Q, narrowband active filter with high gain suitable for an integrated circuit implementation. The high Q is achieved via active feedback with an amplitude control loop. The frequency control of th...
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WO/1999/027690A1 |
A system for controlling a tuning means for receiving broadcasted signals comprises a microcomputer, and means to connect the system to the internet. The microcomputer is adapted to process IP signals and to display web pages including U...
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WO/1999/027667A1 |
The invention relates to a radio receiver comprising a circuit for verifying reception quality at an alternative frequency to a received transmission frequency, two tuners (6,7) for converting received signals into two different intermed...
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WO/1999/027647A2 |
An extra symmetry is introduced into resonant circuits in order to make the location of voltage nodes (+Vdc, -Vdc) of the resonant waveform stationary. These stationary voltage nodes (+Vdc, -Vdc) are then used as the contact points of th...
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WO/1999/026339A1 |
In a receiver for receiving a carrier modulated with data, there is provided a method and apparatus for searching L-Band spectra for digital carriers within a mixed analog/digital environment. Carrier lock is used as a pre-filter prior t...
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