Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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 |
| 7983638 | Tuner input filter with electronically adjustable response for adapting to antenna characteristic A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to the RF tuner. The frequency response adjustment is preferably accomplis... | 07/19/2011 |
| 7668519 | Tuner input filter with electronically adjustable response for adapting to antenna characteristic A system, apparatus and/or method provides frequency response adjustment of an RF input filter of an RF tuner based on impedance of an antenna system that is providing reception of RF signals to the RF tuner. The frequency response adjustment is preferably accomplis... | 02/23/2010 |
| 7386065 | Voltage controlled oscillator (VCO) suitable for use in frequency shift keying (FSK) system A voltage controlled oscillator (VCO), suitable for use in a frequency shift keying (FSK) system. The VCO device comprises a switching varactor unit, having a first terminal and a second terminal, wherein the switching varactor unit produces a capacitance, according... | 06/10/2008 |
| 7365804 | Television tuner for balance-inputting signal to balanced mixer A television tuner includes an unbalanced tuning circuit and a balanced mixer provided at the next stage of the tuning circuit. An output port of the tuning circuit is grounded through a serial circuit composed of an inductive element and a capacitive means. The out... | 04/29/2008 |
| 7349034 | Television tuner using integrated circuit An integrated circuit is provided with a power supply terminal and an external circuit connecting terminal which is DC insulated from an internal high-frequency circuit and is connected to an external circuit. An interface is provided with an address identifying cir... | 03/25/2008 |
| 7339446 | Tunable resonator with MEMS element According to an embodiment of the present invention, a microelectromechanical system (MEMS) element tunes a resonator to a frequency. ... | 03/04/2008 |
| 7295251 | Television tuner capable of improving image disturbance with receiving UHF band The present invention provides to provide a television tuner capable of improving image disturbance when receiving a UHF band television signal. The television tuner comprises a tuning circuit having a tuning circuit having two varactor diodes connected in series wi... | 11/13/2007 |
| 7289780 | Band switchable type tuning circuit of television signal A band switchable type tuning circuit has first switch means interposed between a power supply Vcc and an anode of a switch diode, a first resistor whose one end is connected to a cathode of the switch diode, second switch means interposed between the other end of t... | 10/30/2007 |
| 7283796 | Electronic tuning system An electronic tuning system includes an electronic tuner for adjusting the predetermined control voltage of a voltage controlled oscillator (VCO) to tune the local frequency signal to radio waves on an arbitrary channel in accordance with channel selection informati... | 10/16/2007 |
| 7263339 | Tuner comprising a voltage converter The invention relates to a tuner for converting a radio frequency signal into an intermediate frequency signal, said tuner comprising a voltage converter supplying a control signal, a mixer associated with an oscillator which is voltage-controlled by said control si... | 08/28/2007 |
| 7183880 | Discrete inductor bank and LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 02/27/2007 |
| 7155182 | Varactor with extended tuning range The invention proposes a device for high-frequency and/or radio-frequency tuning comprising within one IC-package a first variable capacitor (C1) and at least one second capacitor (C2), each of the at least one second capacitor (C2) ... | 12/26/2006 |
| 7103320 | Wireless communication system within a system on a chip A communication system (8) for transmitting data between cores (10) embedded in an integrated circuit on a silicon chip (12). Communication system (8) includes transmitter circuitry (24) for wirelessly transmitting data between cor... | 09/05/2006 |
| 7102465 | Frequency discrete LC filter bank An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i... | 09/05/2006 |
| 7095989 | Frequency translating devices and frequency translating measurement systems with DC bias added to a mixer diode A frequency translating device (FTD) includes at least one mixer diode connected to down-convert a radio frequency (RF) to an intermediate frequency (IF) and to up-convert an IF to an RF and a source of direct current (DC) bias that is connected to the mixer diode. ... | 08/22/2006 |
| 7088202 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 08/08/2006 |
| 7088984 | Electronic tuner An electronic tuner of the present invention is arranged such that between an input part of the amplifying circuit and the ground serially connected are a coil and a diode, and a capacitor is connected between the ground and a connecting part between the coil and th... | 08/08/2006 |
| 7030940 | Tuner that suppresses outside radiation of inside oscillated signal An integrated circuit is mounted on a printed board in a state in which a first edge thereof is located to face to a first side of the printed board and a second edge adjacent to the first edge is located to face to a second side adjacent to the first side of the pr... | 04/18/2006 |
| 7020450 | Active inductors using bipolar silicon transistors An active inductor includes bipolar transistors T1, T2, T3 and TD (TD being arranged in diode), where T1's emitter is connected to an output port and to T2's collector. T2's base is connected to a first voltage line and betw... | 03/28/2006 |
| 6975685 | Apparatus and method for multi-channel communications system A communications system employs digitally modulated signals operating in a band of frequencies that is divided into two or more non-overlapping channels, with each channel occupying no more than a predetermined maximum frequency band. A receiver system includes a fr... | 12/13/2005 |
| 6973288 | Linearizer for a PIN diode attenuator Linearizer circuitry is disclosed for providing control signal outputs to operate a controllable attenuator throughout a relatively large dynamic range while maintaining a relatively consistent return loss. Preferred embodiment linearizer circuitry provides a series... | 12/06/2005 |
| 6957053 | Method for selection of a receiver tuning frequency Method for tuning the reception of radio broadcast signals to an FM RDS transmitter using program related data and transmitter related data and receiver executing the method, providing a band scanning search for detecting FM RDS transmitters exceeding a predetermine... | 10/18/2005 |
| 6950152 | Television tuner which has leveled a gain deviation in the same band A gain deviation is leveled in the same band by using a varactor diode having the same characteristics as that used in an input tuning circuit for coupling the input tuning circuit and a high frequency amplifier The input tuning circuit has a tuning varactor diode w... | 09/27/2005 |
| 6940365 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 09/06/2005 |
| 6933984 | Television tuner which maintains UHF band tuning circuit bandwidth constant in low to high band range A tuning circuit's bandwidth is maintained almost constant throughout a UHF low to high band range so as to prevent interference by a neighboring channel, particularly in receiving high band television signals, and also to improve NF in receiving low band television... | 08/23/2005 |
| 6915114 | Direct tuning of embedded integrated circuit components A method and apparatus for direct tuning of a component embedded within an integrated circuit includes processing that begins by providing a plurality of frequency dependent control input signals to an input of the integrated circuit. The processing continues for ea... | 07/05/2005 |
| 6906596 | Oscillation circuit and a communication semiconductor integrated circuit A voltage controlled LC resonance oscillation circuit has a plurality of capacitive elements connected to an output node. These capacitive elements are applied with voltages at opposing terminals for selecting an oscillating frequency band, so that the oscillating f... | 06/14/2005 |
| 6904271 | High-frequency-signal switching circuit suppressing high-frequency-signal distortion A high-frequency-signal switching circuit includes a first high-frequency-signal path which includes first and second diodes connected in series with a high-frequency amplifier stage therebetween, and a second high-frequency-signal path formed of a third diode conne... | 06/07/2005 |
| 6711390 | Program related data in an FM RDS receiver Method for processing transmitter and program related data in an FM RDS receiver and receiver executing the method, providing a band scanning search for detecting FM RDS transmitters exceeding a predetermined reception quality level. To enhance efficiency in data pr... | 03/23/2004 |
| 6583826 | Intermediate frequency circuit in television tuner with large attenuation of audio if signal in adjacent channel The present invention resides in the provision of an intermediate frequency circuit in a television tuner capable of enlarging the attenuation of a audio IF carrier in an adjacent channel without increasing a loss in an intermediate frequency band. The in... | 06/24/2003 |
| 6466114 | Resonator with variable resonance frequency The invention relates to a resonator (200,300) with variable resonance frequency, intended for connection to an amplifier, thus forming an oscillator, said resonator comprising a resonator circuit (205,305) for deciding the resonance frequency of the reso... | 10/15/2002 |
| 6226503 | Double-tuned circuit Between one end of a high-band tuning coil in a primary tuning circuit and one end of a high-band tuning coil in a secondary tuning circuit, a first switch diode and a second switch diode connected in series are provided. A second coupling coil is provide... | 05/01/2001 |
| 6160572 | Tuner for cable modem Input CATV signals are received by a PIN diode where the signals are high frequency signals of a plurality of frequency bands including UHF band, VHF.cndot.HIGH band and VHF.cndot.LOW band, the respective selected high frequency signals are tuned to prede... | 12/12/2000 |
| 5978663 | Antenna tuning circuit An antenna tuning circuit of a tuner with a band switching device, which can eliminate an image disturbance and a disturbance due to a UHF band frequency at reception of a high band and further eliminate a disturbance at a frequency higher than the image ... | 11/02/1999 |
| 5752179 | Selective RF circuit with varactor tuned and switched bandpass filters A selective RF circuit for a double conversion tuner includes three sections: low and mid band double tuned bandpass sections and a high band double tuned bandpass section. Each section includes tuning varactors and one or more coupling varactors. The var... | 05/12/1998 |
| 5715531 | Synchronous tracking filter circuit for a broadcast satellite tuner A synchronous tracking filter circuit for use in a broadcast satellite tuner that comprises four varactors and a strip-shaped inductor plate or pcb-printed strip line which produces a resonant frequency. The circuit is used in a doubly tuned resonant circ... | 02/03/1998 |
| 5715528 | Converting capacitance to inductance in a floating resonant An improved tuner for a varactor-tuned local oscillator in a radio receiver includes a winding of a pair of magnetically coupled inductors, preferably constructed in the form of a transformer. Preferably, the first and second windings are magnetically cou... | 02/03/1998 |
| 5678212 | Electronic tuning circuit for an AM receiver An electronic tuning circuit for an AM radio receiver in which a signal of a specific frequency is selected from the input signal from an antenna is provided, this tuning circuit having a tuning transformer with a first winding and a second winding, the n... | 10/14/1997 |
| 5524288 | Tuning of a radio receiver The present invention relates to a method of tuning a radio receiver to a desired frequency. The frequency of each tuning circuit in the radio receiver is controlled by controlling the capacitance diodes of the tuning circuits. The control is accomplished... | 06/04/1996 |
| 5438690 | Tuner circuit substrate having a jack attachment plate electrically connected with an earth pattern In a tuner for converting antenna input signal into audio signals, tuner circuit components are mounted on a tuner circuit substrate. Of the tuner circuit components, FM wave front end circuit components constituting a high-frequency amplifying circuit, a... | 08/01/1995 |
