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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8150352 | Feedback LNA with image filtering What is described herein is a technique that includes a clock generator configured to generate a clock signal having a frequency of |fbp+fi|. The technique further includes a mixer configured to input (1) an input signal that includes a desired... | 04/03/2012 |
| 8145172 | Low-cost receiver using tracking filter A receiver (400) includes a tracking bandpass filter (420) and a signal processing circuit (430-480). The tracking bandpass filter (420) has a first input for receiving a radio frequency (RF) signal, and an output, and includes a f... | 03/27/2012 |
| 8135370 | FM tuner having adaptive bandpass filter for adjacent channel interference Adjacent interference is reliably detected in an FM tuner. A receiving field strength judgment circuit (102) compares a reception field strength signal SM-DC input from an S-meter circuit (92) and a reference voltage Vref2, and ou... | 03/13/2012 |
| 8131244 | Method and system for dynamically adjusting intermediate frequency (IF) and filtering for microwave circuits Certain aspects of a method and system for dynamically adjusting intermediate frequency (IF) and filtering in microwave circuits may include generating one or more intermediate frequency (IF) signals from one or more baseband signals and/or one or more radio frequen... | 03/06/2012 |
| 8116713 | Automatic bandwidth control with high-deviation detection A signal processing system and methods for controlling a bandwidth of the signal processing system are disclosed. One method includes the steps of detecting a presence of an adjacent signal on at one adjacent channel relative to a desired channel, detecting a modula... | 02/14/2012 |
| 8107914 | RF filter with low-IF mixing, tuning and calibration Radio-frequency (RF) circuits, methods and systems are implemented according to a variety of embodiments. According to one such embodiment, a radio-frequency (RF) receiver circuit is implemented with an adjustable RF filter circuit in a receive path of the RF receiv... | 01/31/2012 |
| 8078129 | Systems and method for a highly integrated multi-mode tuner A method and apparatus for a tuner for adjusting the receiver bandwidth based on adjacent channel interference and group delay distortion. ... | 12/13/2011 |
| 8068803 | Method and apparatus for optimizing signal processing An booster/amplifier receives a plurality of RF signals, including a subject RF signal. A location-based signal spectrum is determined by performing either a frequency scan or an information lookup operation. An initial filter bandwidth for the booster/amplifier is ... | 11/29/2011 |
| 7991373 | Signal filtering system and related methods A signal filtering system for a frequency reuse system. A first implementation may include a downlink baseband signal, coupled to a downlink bandwidth filter, including a composite received signal including at least an interfering signal and a signal of interest, ea... | 08/02/2011 |
| 7756500 | Active inductor circuits for filtering in a cable tuner circuit An integrated front-end filter for a tuner provides an array of from several to a multitude of passbands, each for passing at least one but less than all channels designated in a band of frequencies. Each passband is exclusively selectable. The integrated front end ... | 07/13/2010 |
| 7684775 | Method and apparatus for compensating DC level in an adaptive radio receiver A radio frequency receiver 30, 32, includes a first component block 12, 16, 18, 20; a second compensating component block 22, 22a-22b, 34; and control circuitry 26 operable for controlling the state (e.g., load... | 03/23/2010 |
| 7636559 | RF filter adjustment based on LC variation A system for processing a signal comprises a Radio Frequency (RF) signal tuner, one or more filters in a signal path of the RF tuner each based on Inductive/Capacitive (LC) circuitry, a variation unit operable to measure a variation of the LC circuitry, and a freque... | 12/22/2009 |
| 7577415 | Method and apparatus for ultra wideband power control A method for power control in an ultra wideband impulse radio system includes: (a) transmitting an impulse radio signal from a first transceiver, (b) receiving the impulse radio signal at a second transceiver; (c) determining at least one performance measurement of ... | 08/18/2009 |
| 7519344 | Bandpass amplifier, method, and system An amplifier has a band pass response. The band pass response may be set by setting corner frequencies of low pass filters. ... | 04/14/2009 |
| 7512392 | System for adaptively filtering a received signal in a wireless receiver An adaptive band-pass filter for a wireless receiver comprises a band-pass filter associated with the receiver, the band-pass filter configured to selectively filter the received signal, and a switch responsive to a control signal, the switch configured to control t... | 03/31/2009 |
| 7437139 | Method and apparatus for calibrating filtering of a transceiver A method and apparatus of calibrating filtering of receive and transmit signals is disclosed. The method of calibrating filtering of a received signal includes injecting an LO signal. The injected LO signal is filtered by a tunable filter. The filtered signal is fre... | 10/14/2008 |
| 7430420 | Cell selection and inter-frequency handover The present invention provides a method and an apparatus for controlling a communications system that includes a mobile wireless device, a first and a second base station and a radio network controller. The communications system may allocate frequency bands to users... | 09/30/2008 |
| 7428262 | Channel estimation in a rake receiver of a CDMA communication system A method and apparatus for channel estimation in a rake receiver of a CDMA communication system operates with a finite-impulse-response channel estimation filter with L taps and having a fixed delay. A pilot sequence of a received sequence of data from a channel of ... | 09/23/2008 |
| 7421262 | Tuning method and apparatus for reducing interference between adjacent channels A tuning method comprises: detecting a fundamental intermediate frequency IF0 of a channel to be received; determining whether the fundamental intermediate frequency IF0 is affected by an adjacent channel; when the fundamental intermediate freq... | 09/02/2008 |
| 7386306 | Multi-carrier communications methods and apparatus Methods and apparatus for implementing a multi-carrier communications system are described. Various approaches to a phased system deployment and system configurations resulting from different levels of deployment are described. In addition mobile node and methods of... | 06/10/2008 |
| 7369836 | Adjacent interference removal device An adjacent interference removal device capable of providing an improved reception quality. An IF signal Sin having passed through an IF filter having a pass frequency band width of 200 kHz is supplied to a first narrow band filter having a pass frequency band width... | 05/06/2008 |
| 7369829 | Signal reception apparatus and method for multi-band ultra-wideband communication systems A signal reception apparatus and method for communication systems. The signal reception apparatus for communication systems according to the present invention is applicable to communication environments in which a plurality of sub-bands having different frequency ba... | 05/06/2008 |
| 7366489 | Mobile communication apparatus A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF b... | 04/29/2008 |
| 7362384 | Apparatus and method for feed-forward image rejection in a dual conversion receiver A receiver portion includes a bandpass filter (e.g. SAW filter) that performs channel selection from an input signal having a plurality of channels, and an image cancellation circuit that is in parallel with the bandpass filter. The bandpass filter performs channel ... | 04/22/2008 |
| 7363013 | Phase lock loop applying in wireless communication system and method thereof A phase lock loop receives a baseband signal which has an input frequency, and modulating the baseband signal to be a corresponding RF signal which has a predetermined transmission frequency for transmitting. The phase lock loop comprises a programmable divider, a m... | 04/22/2008 |
| 7359691 | High frequency interference-cut filter circuit Disclosed is a high frequency apparatus which eliminates an influence of interfering signals. An interference-cut filter (24) for eliminating interfering signals is disposed between an input terminal (22) and a mixer (27). The interference-cut f... | 04/15/2008 |
| 7356314 | Systems and methods for reusing a low noise amplifier in a wireless communications device A wireless communication device comprises a plurality of receive signal paths, each of the receive signal paths is configured to receive signals in a certain frequency bandwidth. The communication device also comprises an amplifier coupled with each of the plurality... | 04/08/2008 |
| 7339883 | Ultra-wideband communication protocol A communication protocol for ultra-wideband communications is provided. The present invention provides compatibility and interoperability between ultra-wideband communications devices within various types of networks. In one embodiment, combined, or interleaved data... | 03/04/2008 |
| 7340233 | Integrated circuit and methods for third sub harmonic up conversion and down conversion of signals An integrated circuit may include a receiver and/or a transmitter that performs third order sub-harmonic conversion. The integrated circuit may include a Gilbert cell active mixer with three or more serially-connected transistors in each of the mixer's four branches... | 03/04/2008 |
| 7340509 | Reconfigurable appliance control system A reconfigurable appliance control system includes a dedicated appliance control (DAC) for controlling operation of an appliance. The system further includes an appliance communication control (ACC) for communicating with at least one appliance. The system includes ... | 03/04/2008 |
| 7340234 | UWB transmitting and receiving device for removing an unnecessary carrier component in a transmission signal spectrum An Ultra Wide Band (UWB) transmitting and receiving device that includes a Digital Signal Processor (DSP) for implementing a DC offset cancellation algorithm, an adder for adding a baseband transmission signal from the transmitter and a calibration signal produced b... | 03/04/2008 |
| 7336939 | Integrated tracking filters for direct conversion and low-IF single conversion broadband filters A radio frequency (RF) tuner includes a programmable tracking filter bank receiving an RF input and outputting a filtered RF signal. A mixer stage receives the filtered RF signal and outputs a first quadrature component of the filtered RF signal and a second quadrat... | 02/26/2008 |
| 7336732 | Carrier frequency detection for signal acquisition A carrier frequency in a filtered received M-ary phase-shift keyed (MPSK) modulated signal having in-phase and quadrature components is detected by processing the filtered received signal to remove modulation components and thereby generate a test signal at the carr... | 02/26/2008 |
| 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 |
| 7310507 | Filter circuit permitting adjustment of cutoff frequency A filter circuit, having a plurality of selectable impedance elements, that has a cutoff frequency dependent on a selected impedance element, comprises a pulse generation circuit that supplies a variable frequency pulse with a successively increasing or decreasing f... | 12/18/2007 |
| 7299029 | Method of operating radio receiver implemented in a single CMOS integrated circuit A single chip superhetrodyne AM receiver is disclosed herein. To compensate for process variations in the implementation of the IC, bias currents setting the operating conditions for various amplifiers and other components in the system are adjusted based on frequen... | 11/20/2007 |
| 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 |
| 7292830 | Receiver gain management Noise floor searching is performed for a cellular base station to increase accuracy of receiver gain estimates. This allows adjustment of gain in a radio module to account for gain in front-end devices, and achieve a desired overall receiver target gain. The gain of... | 11/06/2007 |
| 7292649 | 3G radio A homodyne receiver is provided for receiving GSM and UMTS transmissions. The receiver may also be used for other transmission schemes. The receiver includes an electronically reconfigurable low pass filter and an off set generator for providing DC offset correction... | 11/06/2007 |
