Quotables
"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7286804 | Receiver digital-analog converter and tuning circuit An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constitu... | 10/23/2007 |
| 7269399 | Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The receiver comprises an antenna tuning circuit 10 including a tuning co... | 09/11/2007 |
| 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 |
| 7236212 | System and method for providing a low power receiver design An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 06/26/2007 |
| 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 |
| 7199664 | Integrated switchless programmable attenuator and low noise amplifier An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/03/2007 |
| 7139545 | Ultra-wideband fully synthesized high-resolution receiver and method An ultra-wideband receiver system includes an intelligent-preselector stage to up-convert received signals to signals within a first IF frequency-range with stepped first oscillation signals, a first down-converting stage to down-convert the signals within the first... | 11/21/2006 |
| 7132888 | Large gain range, high linearity, low noise MOS VGA An integrated receiver with channel selection and image rejection is substantially implemented on a single CMOS integrated circuit. A receiver front end provides programable attenuation and a programable gain low noise amplifier. LC filters integrated onto the subst... | 11/07/2006 |
| 7109781 | Temperature compensation for internal inductor resistance A compensation circuit compensates for the variation in the internal resistance of a multi-track inductor over temperature. The compensation circuit includes a dummy inductor that has the same temperature dependent resistance as that of the multi-track inductor that... | 09/19/2006 |
| 7092043 | Fully integrated tuner architecture An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 08/15/2006 |
| 6842610 | Tuner A tuner includes an input terminal, first to fourth band-pass filters, an automatic gain controller, first to third amplifiers, first and second mixers, first and second voltage controlled oscillators, first and second PLL ICs, a reference oscillator circuit, and an... | 01/11/2005 |
| 6188970 | Method of calibrating a multistage selective amplifier In a method for calibrating or aligning a multistage selective amplifier including an oscillator circuit and at least one tuning circuit, the tuning voltages respectively necessary for aligning the respective tuning circuits to the required receiving freq... | 02/13/2001 |
| 6178315 | FM radio receiver An FM radio receiver comprises a radio frequency tuning circuit for selecting a frequency modulated signal from an antenna and a local oscillator tuning circuit for tuning to an oscillating signal so as to convert the frequency modulated signal to an inte... | 01/23/2001 |
| 6057876 | Dual conversion settop terminal including a system for avoiding oscillator difference beats An improved multiple conversion CATV settop terminal eliminates the adverse effects of oscillator difference beats by selectively controlling local oscillators and the use of a wideband bandpass filter. The wideband bandpass filter is coupled between the ... | 05/02/2000 |
| 5697089 | Local oscillator having plural oscillators facilitating channel switching A device for generating a first signal and a second signal in a receiver for reception of a number of radio frequency signals. The first signal is mixed in a first mixer with the received radio frequency signals in order to generate an intermediate freque... | 12/09/1997 |
| 5613230 | AM receiver search tuning with adaptive control An AM radio receiver includes search tuning such as seek or scan tuning features whose stop thresholds for locking onto a received frequency are adapted to environmental conditions. In the preferred embodiment, wideband signal strength, preferably derived... | 03/18/1997 |
| 5603109 | Automatic frequency control which monitors the frequency of a voltage controlled oscillator in a PLL demodulator An automatic frequency control circuit measures the deviation in frequency of a selected signal from a reference frequency and when the deviation exceeds a selected threshold which is variable, steps the frequency of the selected signal back to the proper... | 02/11/1997 |
| 5511235 | Apparatus for detecting a signaling channel during scanning including a controlled frequency converter circuit and a controlled filter bandwidth, and a method therefor A receiver has a channel scan mode of operation and a communication mode of operation. In the channel mode of operation, the passband of a filter is narrowed relative to the passband of the filter in the communication mode. According to another aspect of ... | 04/23/1996 |
| 5483662 | Spade signal receiving station In an earth-based receiving station for receiving radio signals transmitted from a satellite relay station, a common first frequency converter and at least two receivers are provided. One of the receivers is used as a control receiver to receive a CSC car... | 01/09/1996 |
| 5483686 | Channel selecting apparatus for simultaneous use with both phase-continuous modulation signals and digital modulation signals A channel selecting apparatus simultaneously selects both the modulation signals, which are simultaneously received at different channels where modulation signals having a continuous phase and digital modulation signals having a discontinuous phase are lo... | 01/09/1996 |
| 5461645 | Frequency stabilizing device An intermediate frequency (IF) converter converts a received signal to an IF signal. A demodulator demodulates the IF signal to a demodulated signal and detects a phase error. A frequency error detector detects a frequency error based on the phase error. ... | 10/24/1995 |
| 5428829 | Method and apparatus for tuning and aligning an FM receiver A method for tuning and aligning an electronically tuned FM broadcast receiver is described. The system described compensates for the mismatch of component values between the antenna and RF amplifier tuned circuits, and the IF offset between the local osc... | 06/27/1995 |
| 5303398 | Stability detection method and apparatus for a tuning system An indication of stability of a tuning system after changing, the local oscillator frequency to a predetermined frequency, such as a frequency corresponding to a new channel during a channel changing operation or to a new search frequency during a search,... | 04/12/1994 |
| 5101509 | RF filter alignment using digital processor clock A variable frequency RF passband filter is calibrated to maximize the sensitivity of a radio receiver using reference frequencies applied based on the clock operation of a digital processor within the receiver. The reference frequency passing through the ... | 03/31/1992 |
| 5038405 | Tunable antenna apparatus and method for use with superheterodyne receivers An antenna tuning system and method are disclosed for use with a tunable receiver coupled to an external antenna, where the receiver has a local oscillator whose frequency is a function of the frequency to which the receiver is tuned. The tuning system in... | 08/06/1991 |
| 4955077 | Radio with broad band automatic gain control circuit The disclosure relates to a radio which prevents the level of a signal transmitted from a desired broadcasting station from being suppressed by the operation of a broad band automatic gain control circuit in the presence of an interference signal. The rad... | 09/04/1990 |
| 4939789 | Signal receiver for terrestrial and satellite broadcastings A signal receiver which is capable of receiving and demodulating a satellite broadcasting signal which is an FM signal and a terrestrial broadcasting signal which is an AM signal is disclosed. FM and AM signals are frequency-converted into signals having ... | 07/03/1990 |
| 4910796 | Automobile antenna An automobile antenna including a high frequency signal processing unit provided near an antenna where the processing unit only tunes in a designated frequency band and amplifies it and further detects the amplified signal. The high frequency signal proce... | 03/20/1990 |
| 4837852 | Electronic tuning circuit for AM receiver which is easy to effect tracking adjustment An electronic tuning circuit for AM receiver is disclosed which is so designed that tracking errors are minimized by increasing the accuracy of constants for tuning coils, oscillation coils and capacitance elements incorporated in an antenna tuning circui... | 06/06/1989 |
| 4817192 | Dual-mode AFC circuit for an SSB radio transceiver An automatic frequency control (AFC) circuit is disclosed for use in an SSB radio transceiver having the capability of transmitting and receiving SSB and FM data signals over any one of a number of communication channels having equal bandwidths. The dual-... | 03/28/1989 |
| 4817200 | Tracking YIG tuned filter-mixer A tracking YIG tuned filter-mixer circuit is provided. In the preferred embodiment, four YIG-tuned resonators are combined to provide a tracking filter-mixer with a switched input. Field coils produce a magnetic tuning field that is uniform over the four ... | 03/28/1989 |
| 4794458 | Modulation device A modulation device especially suitable for use in a joint TV reception device for tuning the input video and audio signals to various TV channel frequencies. The device includes a modulator for modulating a carrier wave with the video and audio signals t... | 12/27/1988 |
| 4783849 | FET tuner The RF stage and local oscillator stage of a tuner both include respective cascode connected dual gate field effect transistors as the amplifying device and similarly configured tuned circuits coupled to the first gate electrodes of the field effect trans... | 11/08/1988 |
| 4760535 | Control circuit for tuning a high-frequency input circuit A control circuit for tuning a high-frequency input circuit comprises, in addition to a first adjustable component 5 which is directly controlled by a control voltage, further adjustable components 6, 10 which are likewise under the influence of a control... | 07/26/1988 |
| 4742564 | Tuning alignment data memory device for tuning circuits tunable to selectable frequencies The invention relates to a tuning memory device for tuning circuits to selectable frequencies and in which digital tuning data corresponding to said frequencies are stored in a programmable memory. For each selectable frequency the programmable memory con... | 05/03/1988 |
| 4736456 | Tuning system for television sets An automatic alignment system for the tuner of a television receiver with a controlled high-frequency preamplifier stage and an intermediate-frequency amplifier that has a reference circuit with a resonance frequency that can be switched to the arithmetic... | 04/05/1988 |
| 4726072 | Double converter tuner Disclosed is a double converter tuner having an input circuit for performing first band control with respect to an input signal, amplifying a band-controlled input signal after automatic gain control is performed, and further performing second band contro... | 02/16/1988 |
| 4685150 | Tuning of a resonant circuit in a communications receiver A method and apparatus is provided for the tuning of the resonant circuits of a communications receiver. The frequency fD is generated with an additional oscillator, which frequency is then mixed with the receiver oscillator frequency, of which... | 08/04/1987 |
| 4662001 | Tunable notch filter for image frequency and conducted local oscillator leakage rejection A tunable notch filter for the front end of an RF receiver includes magnetically coupled input and output tunable stages each responsive to a tuning voltage provided thereto. Each of the input and output stages includes a respective series and parallel re... | 04/28/1987 |
| 4658437 | Tuning voltage tracking arrangement A superheterodyne receiver having a plurality of selectable bands includes a tuning voltage source and a band selection signal source. To improve tracking, the receiver includes a selectively enabled voltage modifying arrangement responsive to the band se... | 04/14/1987 |
