Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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 |
| 7436276 | Tuning circuit preventing a deterioration of Q value A tuning circuit comprises, at least, a first circuit K1 which serially connects a first variable capacitor element 21a and a second variable capacitor element 31a, an inductance element 23a which is parallely connect... | 10/14/2008 |
| 7295822 | Radio wave receiver, radio-controlled timepiece and tuning capacitance setting method A radio wave receiver for receiving radio waves having a predetermined frequency, the receiver comprises an antenna, an variable capacitor connected to the antenna, a memory, and a controller which determines an optimum capacitance of the variable capacitor with whi... | 11/13/2007 |
| 7200370 | Power amplifier having enhanced swing cascode architecture A Radio Frequency (RF) power amplifier includes a transconductance stage, an AC coupling element, and a cascode stage. The transconductance stage is adapted to receive an input RF voltage signal and to produce an output RF current signal. The cascode stage is adapte... | 04/03/2007 |
| 7173505 | Tuning RF circuits using switched inductors provided in a monolithic integrated circuit A Radio Frequency (RF) circuit includes an active portion and a tuned portion. The active portion receives an RF signal and that operates upon the RF signal. The tuned portion couples to the active portion and includes a first inductor, a second inductor, and a swit... | 02/06/2007 |
| 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 |
| 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 |
| 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 |
| 6889036 | Integrated frequency selectable resonant coupling network and method thereof An integrated center frequency selectable resonant coupling network suited for use in an integrated circuit is disclosed. The network includes an integrated coupling transformer having a secondary winding for coupling to a load and a primary winding for coupling to ... | 05/03/2005 |
| 6433658 | High Q structure A structure (110, 150) for enhancing the quality factor (Q) of a capacitive circuit (112, 152). The capacitive circuit (112, 152) includes a first resistance (122, 164), a capacitance (124, 166), and a second resistance (126, 168). The capacitance (124, 1... | 08/13/2002 |
| 6239675 | Tuning circuit having switchable capacitor controlled by a selection circuit An electronic system 8 is disclosed herein. The system includes circuitry 10 for processing a signal and a plurality of antennas 12a-12b. A plurality of switches 22a-22b are also included. Each of the switches 22a-22b is coupled between the processing cir... | 05/29/2001 |
| 6232847 | Trimmable singleband and tunable multiband integrated oscillator using micro-electromechanical system (MEMS) technology A high-Q precision integrated reversibly trimmable singleband oscillator and tunable multiband oscillator are presented that overcome the problems laser trimming and solid state switches. This is accomplished using micro-electromechanical system (MEMS) te... | 05/15/2001 |
| 6181218 | High-linearity, low-spread variable capacitance array The invention provides a unique apparatus and method which varies the capacitance coupled to a circuit. In one embodiment, the variable capacitance comprises a unique variable capacitance array with multiple capacitance modules which can be selectively en... | 01/30/2001 |
| 5953642 | System for contactless power and data transmission In a system for contactless power and data transmission, a transmitting or receiving station has at least one transmitting or receiving resonant circuit which is driven by an integrable control circuit. The integrated control circuit has a multiplicity of... | 09/14/1999 |
| 5880921 | Monolithically integrated switched capacitor bank using micro electro mechanical system (MEMS) technology A monolithically integrated switched capacitor bank using MEMS technology that is capable of handling GHz signal frequencies in both the RF and millimeter bands while maintaining precise digital selection of capacitor levels over a wide tuning range. Each... | 03/09/1999 |
| 5841334 | RF capacitor circuit and method of electronically tuning same An RF capacitor circuit having a plurality of capacitors and a method of electronically tuning such circuit is disclosed. The method includes the steps of connecting the capacitors in parallel relation so as to have common nodes and electronically elimina... | 11/24/1998 |
| 5821838 | Double tuning circuit of TV tuner The double tuning circuit of a TV tuner provided by the present invention comprises a primary tuning circuit and a secondary tuning circuit coupled with each other wherein at least one of the primary and secondary tuning circuits comprises two series circ... | 10/13/1998 |
| 5473291 | Solid state plasma chamber tuner A solid state automatic tuner is used in a plasma processing system for measuring and adjusting a voltage standing wave ratio of the system. The tuner has a switched variable inductor circuit controlled by an automatic control system coupled to an impedan... | 12/05/1995 |
| 5300904 | Circuit arrangement for the tank circuit of a high-frequency transmitter output stage operated with frequency shift keying The invention concerns a circuit for the resonant cavity in a frequency-shift HF transmitter output stage, with a first capacitance (2), a first inductance (3) and a first switch (5) for feeding the HF signal to the resonant cavity. To switch the resonant... | 04/05/1994 |
| 5065121 | Switchable resonator device A switchable resonator device having a selectable center frequency over a wide radio frequency range comprising a radio frequency signal input and output means, a resonator structure connected between the signal input and output means for respectively rec... | 11/12/1991 |
| 4890063 | Probe coil system for magnetic resonance apparatus A probe coil system for a magnetic resonance (MR) apparatus includes a plurality of coil elements, a plurality of shortening capacitor elements, and first and second capacitors. The plurality of shortening capacitor elements are inserted between and in se... | 12/26/1989 |
| 4802238 | Radio receiver In a radio receiver which can be switched between at least two waveranges, the coil winding (33) of the oscillator circuit (31) has a further coil winding (36) inductively coupled to it with which a capacitor (37) is arranged in parallel for limiting the ... | 01/31/1989 |
| 4710719 | High voltage capacitor wand for high power tuned circuits Two or more high power rf capacitors are mounted on the surface of a printed circuit board that has been developed, etched, and plated to receive the capacitors and to engage mating spring contact fingers for electrical contact between the tuned circuit a... | 12/01/1987 |
| 4633206 | Expanded dial arrangement for 56 channel UHF tuner The channel selector shaft of a 70 channel mechanically detented UHF tuner is provided with mechanical stops which prevent the shaft from moving above UHF channel No. 69 so that the upper twenty-four UHF channels are unused. Also, a dial driving arrangeme... | 12/30/1986 |
| 4602222 | Circuit for bandswitching a voltage controlled oscillator A circuit is provided which is capable of band switching a voltage controlled oscillator (VCO) while maintaining the relative sensitivity of the voltage controlled device and, hence, the control line voltage itself. The circuit includes an array of capaci... | 07/22/1986 |
| 4216451 | Variable capacitance device having a plurality of capacitance elements and a plurality of switching elements therefor formed on a single common substrate A variable capacitance semiconductor device is provided wherein a plurality of capacitance elements each having a fixed capacitance value are coupled in parallel with each other and at least two insulated gate field effect transistors are provided for eac... | 08/05/1980 |
| 4186360 | Digital channel selecting apparatus A digital channel selecting apparatus for selecting a channel among a plurality of channels which are distributed in at least a relatively higher and lower frequency regions, wherein a plurality of capacitance elements are coupled in parallel, each consti... | 01/29/1980 |
| 4138654 | Digitally tuned circuit including switching of bank capacitors between plural tuned circuits An electrically tuned filter arrangement including several tuned filters which may alternatively be coupled to the input and output of the filter arrangement so as to provide the arrangement with different tuning ranges. Each tuned filter has a tuning inp... | 02/06/1979 |
| 4056796 | Detented UHF television tuner with independent inductive fine tuning A UHF television tuner utilizes a mechanical fine tuning mechanism that alters the operation frequency of the oscillator of the tuner independently of the position of the main tuning shaft. The mechanical fine tuning mechanism utilizes a tuning slug dispo... | 11/01/1977 |
| 4009451 | Frequency range selectable oscillator for multichannel communication system To provide the required multiple channels for an aircraft communications system, a crystal controlled reference oscillator includes a tunable circuit for changing the base reference frequency provided by a crystal. The base reference frequency of the crys... | 02/22/1977 |
