Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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 |
| 7868687 | Ideal-like band-pass filter and single-frequency filter A near ideal single frequency and band pass filter comprises an input unit, a filter combination, and an output unit. The input unit accepts an input signal which can be expressed with a mathematical formula f(t). The filter combination comprises a plurality of filt... | 01/11/2011 |
| 7808310 | Differential band-pass filter having symmetrically interwoven inductors One embodiment of the invention relates to a dynamically adjustable differential band-pass filter. This band-pass filter includes a first leg that has an input portion and an output portion with a first inductor therebetween. It also includes a second leg in paralle... | 10/05/2010 |
| 7750730 | Bandpass filter circuit A semiconductor integrated circuit device provided with an input terminal supplied with a reference frequency signal from outside of the device, a bandpass filter circuit coupled to the input terminal and outputting an internal reference frequency signal and a PLL c... | 07/06/2010 |
| 7719350 | Bandpass sample-and-hold circuit A sample-and-hold circuit includes a transconductance cell and an inductive-capacitive (L-C) resonator circuit acting as a bandpass filter. ... | 05/18/2010 |
| 7639071 | Active LC band pass filter An active LC band pass filter 10 includes a single LC pair and a plurality of active amplifiers providing a number of separate resonance circuits. The active amplifiers compensate ohmic losses, high frequency skin effects, and high frequency radiation. Each c... | 12/29/2009 |
| 7560982 | Apparatus for reducing apparent capacitance in high frequency filter for power line An Op amp circuit is used to provide higher capacitance to a power network to remove unwanted high frequency components from the power signal. At the primary power line frequency, a lower capacitance is presented by the circuit. ... | 07/14/2009 |
| 7521991 | Balanced band-pass filter for radio receivers A filter includes an input and an output. First and second filter stages having respective stage inputs and stage outputs are connected in cascade between the input and the output. Each filter stage includes an amplifier having an amplifier input and an amplifier ou... | 04/21/2009 |
| 7463086 | Apparatus and method for tuning a band pass filter A tunable band pass filter is provided. The tunable band pass filter includes a band pass filter and a plurality of switches coupled to the band pass filter. The band pass filter includes a plurality of transconductors and a plurality of capacitors. The tunable band... | 12/09/2008 |
| 7436250 | Highly selective filtering device and corresponding filtering method The invention proposes a filtering device having a frequency response which is symmetrical, using asymmetrical filters coupled by transposition means. The advantageous characteristics of the asymmetrical filters are retained and the faults associated with the asymme... | 10/14/2008 |
| 7429889 | Control system for programmable filters Control system for programmable filters, master-slave calibration system and fully programmable high precision filter for use in such control system, such filters being provided with a filter input and a filter output including a first, first order low pass filter s... | 09/30/2008 |
| 7417495 | Reconfigurable frequency filter There are various mobile communication standards such as GSM, EDGE, and W-CDMA. For a GSM or EDGE system, a receiver must be configured to work with an IF signal with a center frequency and bandwidth of 200 KHz. For WCDMA system, the same receiver must be configured... | 08/26/2008 |
| 7372323 | Resonance limiter circuits for an integrated circuit In one embodiment, an integrated circuit comprises resonance limiter circuits coupled to a power supply connection of the integrated circuit. The resonance limiter circuits are configured to detect oscillation on the power supply connection at a resonant frequency, ... | 05/13/2008 |
| RE40292 | Bandpass filter The bandpass filter has a comparatively large pass bandwidth, with, at the same time, comparatively steep edges up to the stop band and low attenuation in the passband. The bandpass filter contains three parallel LC elements, one of which is connected between the ba... | 05/06/2008 |
| 7368981 | Limit circuit A limit circuit capable of providing high gain. The limit circuit included in an FM receiver comprises, for example, seven amplifiers (11 to 17), and a BPF (18) inserted substantially in the middle thereof. Each of the amplifiers (11 to | 05/06/2008 |
| 7349174 | Soft sensor for operating shock in a disc drive A method of preventing a write operation to a disc in a disc drive during a shock event without the use of a separate shock sensor comprises steps of monitoring an actuator voice coil motor (VCM) control plant output signal, generating an actuator voice coil motor (... | 03/25/2008 |
| 7332970 | Integrated amplifier, electronic communication unit with integrated amplifier and method for operating the electronic communication unit with an integrated amplifier An integrated amplifier has a resonant circuit with a tuneable center frequency, in which the resonant circuit has at least one coil and at least one varactor for varying a resonant frequency of the resonant circuit. ... | 02/19/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7318081 | Band-pass filter and tracking signal processor circuit A band-pass filter includes two operational amplifiers. The gm values of the operational amplifiers are each determined by a current flowing through a corresponding transistor for inducing flow of the drive current. The current flowing through the transistor is adju... | 01/08/2008 |
| 7308241 | Receiver system A conventional receiver system has a filter circuit with unsatisfactory gain characteristics, and thus does not offer satisfactory reception performance. A receiver system of the invention has a filter circuit employing an equivalent inductor circuit including a cap... | 12/11/2007 |
| 7304533 | Integrated channel filter using multiple resonant filters and method of operation A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter co... | 12/04/2007 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7292092 | Tunable poly-phase filter and method for calibration thereof A resonator circuit is shown that is fabricated with substantially identical elements disposed symmetrically along an axis such that the circuit has a linear response to bias current. The alignment of the circuit permits multiple characteristics of the circuit to be... | 11/06/2007 |
| 7266351 | Transconductance / C complex band-pass filter A complex filter such as the channel select filter in a radio transceiver is implemented using a transconductance/C topology to benefit from the ability to tune such filters and thereby stabilize the output transfer function of the filter over variations in temperat... | 09/04/2007 |
| 7248103 | Complex band-pass filter A complex band-pass filter. The complex band-pass filter includes a band-pass filter coupled to a voltage source. The band-pass filter includes a first plurality of transconductors that receives a first voltage, where the first voltage controls the center frequency ... | 07/24/2007 |
| 7245186 | Bandpass amplifier The present invention discloses a bandpass amplifier having gain and bandpass performance. The bandpass amplifier includes an input match unit for matching the gain of the amplifier and having a first filter response; a first bias unit electrically connected to the ... | 07/17/2007 |
| 7245178 | Analog filter circuit and adjustment method thereof An analog filter circuit in which filter characteristic deviation can be adjusted with simple circuitry and its adjustment method can be provided. The analog filter circuit includes a low pass filter and a high pass filter and output signals of both filters are inpu... | 07/17/2007 |
| 7233616 | Arrangement for initializing digital equalizer settings based on comparing digital equalizer outputs to prescribed equalizer outputs A physical layer transceiver, configured for retrieving signal samples from a prescribed network medium having an undetermined length, includes a digital feedforward equalizer, configured for generating equalized signal samples from the retrieved signal samples and ... | 06/19/2007 |
| 7196574 | Active polyphase ladder filters with transmission zeros and their synthesis method Direct incorporation of transmission zeros into a continuous-time active complex BP filter transfer function yields a filter having much sharper roll-off than that of an all-pole filter. The ladder filter is constructed using transconductors and capacitors only. The... | 03/27/2007 |
| 7171010 | Dynamic bass boost apparatus and method Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and providing a filtered output signal, the variable filter having a fixed... | 01/30/2007 |
| 7164261 | Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method includes the measurin... | 01/16/2007 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7098731 | Synthesis method for an active polyphase filter A fully-integrated continuous-time active complex bandpass IF filter that may contain transmission zeros yielding much sharper roll-off than that of an all-pole filter is implemented using transconductors and capacitors only. Each of the filter second-Order sections... | 08/29/2006 |
| 7081796 | Radio frequency low noise amplifier with automatic gain control A low noise amplifier (500) includes a first transconductance device (326) having a control electrode for receiving a first input signal, and a first current electrode; a first load device (322) having a first terminal coupled to a first power s... | 07/25/2006 |
| 7081788 | Band pass filter A band pass filter includes a first band pass filter constructed of a biquad circuit and having a first center frequency, and a second bandpass filter constructed of a biquad circuit and having a second center frequency different from the first center frequency, and... | 07/25/2006 |
| 7082171 | Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul... | 07/25/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7071760 | Filter circuit and detection circuit having filter circuit A filter circuit has an input terminal which is input with a first current, and which is coupled with a first node, capacitor, of which one terminal is coupled with the first node, of which the other terminal is coupled with a second node, and which integrates the f... | 07/04/2006 |
| 7061310 | All-pass filter circuit An all-pass filter circuit includes a first terminal to which an input signal is input, a capacitor having a first electrode connected to the first terminal and a second electrode, a current amplifier circuit which is configured by MOS transistors, has an input term... | 06/13/2006 |
