Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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 |
| 8131245 | Mixer for downconversion of RF signals A mixer for downconversion of RF signals includes at least one RF transistor (305); at least one switching pair (303) connected to the drain current (301) of the at least one RF transistor (305); and a common mode sensing component (30... | 03/06/2012 |
| 8055233 | High linearity passive mixer and method thereof A high linearity mixer circuit includes a commutation network comprising four switches to provide an electrical coupling between a first pair of circuit nodes and a second pair of circuit nodes, whereas the coupling has two states and is controlled by a pair of comp... | 11/08/2011 |
| 8045943 | High performance CMOS radio frequency receiver A high performance radio frequency receiver includes a low noise amplifier with large binary and stepped gain control range, controlled impedance, and enhanced blocker immunity, for amplifying and converting a radio frequency signal to a current; a pulse generator f... | 10/25/2011 |
| 7877073 | Superheterodyne receiver having at least one downconversion stage empolying a single image reject filter stage and both low-side injection and high-side injection of a local oscillator signal A multi-channel superheterodyne receiver employs a low intermediate frequency (IF) and both high-side injection and low-side injection of a selected local oscillator (LO) signal into the mixer in order to position image frequencies outside the passband of a single i... | 01/25/2011 |
| 7853232 | Low-noise amplifier and antenna device having the same To provide an antenna device adapted to interrupt jamming waves and enable cost reduction, a high-pass filter (HPF) adapted to interrupt general-use frequencies at least near a low-frequency side of a pass band intended for use is provided as a frequency selection c... | 12/14/2010 |
| 7761074 | Low-noise amplifier and antenna device having the same To provide an antenna device adapted to interrupt jamming waves and enable cost reduction, a high-pass filter (HPF) adapted to interrupt general-use frequencies at least near a low-frequency side of a pass band intended for use is provided as a frequency selection c... | 07/20/2010 |
| 7729678 | Controllable power operational transconductance amplifier Controllable operational transconductance power amplifier (controllable power OTA) including an input stage receiving a differential input signal (Ovin) and deriving therefrom first (i1) and second (i2) low power current signals being coupled to first ... | 06/01/2010 |
| 7668526 | Frequency mixer using current feedback amplifiers A frequency mixer includes a semiconductor substrate. An input current feedback amplifier is formed on the semiconductor substrate and receives a radio frequency (RF) signal and a local oscillator (LO) signal. An inverting current feedback amplifier is formed on the... | 02/23/2010 |
| 7650131 | Wireless receiver and its demodulating method A wireless receiver which is used for a digital signal transmission system to wirelessly transmit a digital signal by packetizing and modifying it, selectively sets the shortest arithmetical bit length satisfying a required communication quality when performs demodu... | 01/19/2010 |
| 7613440 | Mixer circuit A mixer circuit of a receiving system, requiring low noise characteristics at lower frequency, includes a bypass current source (41) which is connected in parallel with an LO transistor (21) between an IF output terminal (33) and a drain termina... | 11/03/2009 |
| 7483684 | Mixer To realize a mixer with a charge subsampling circuit with which a base band signal can be readily obtained without being affected by noise from wide bandwidth signals or undesired signals. A current generating circuit 8 outputs a current in proportion to the ... | 01/27/2009 |
| 7421036 | Systems and methods of RF power transmission, modulation, and amplification, including transfer function embodiments Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 09/02/2008 |
| 7398073 | Low noise mixer A low noise mixer comprises a first mixer core configured to receive a radio frequency (RF) input signal having an RF frequency, and a first local oscillator signal, wherein the first local oscillator signal is at a frequency that is nominally twice the frequency of... | 07/08/2008 |
| 7395043 | Data receiver adaptive to RSSI and a method of determining its threshold A modem generates a new RSSI threshold value in response to a flag signal representing the quality of the threshold value indicated by the result of error detection supplied from one monitor, and supplies the generated threshold value to another monitor. The RSSI th... | 07/01/2008 |
| 7392033 | Reducing active mixer flicker noise A mixer is disclosed that includes first and second transconductance modules that, in one embodiment, includes MOSFETs configured to receive a plurality of signals that are to be mixed and a selectively coupled auxiliary current source to inject an auxiliary current... | 06/24/2008 |
| 7386290 | RX dual-band mixer A dual-band input transceiver block is formed to operably receive one of a 2.4 GHz radio frequency signal or a 5.0 GHz radio frequency transceiver signal in a manner that minimizes duplication of circuitry and creates a combined circuit path for RF front end input s... | 06/10/2008 |
| 7376407 | System and method for dynamic impedance tuning to minimize return loss A system for tuning an impedance at a node comprises a first component associated with a first impedance when the first component is operating and a second impedance when the first component is not operating. The system further comprises a second component coupled t... | 05/20/2008 |
| 7376403 | Terahertz radiation mixer A terahertz radiation mixer comprises a heterodyned field-effect transistor (FET) having a high electron mobility heterostructure that provides a gatable two-dimensional electron gas in the channel region of the FET. The mixer can operate in either a broadband pinch... | 05/20/2008 |
| 7369837 | Frequency-mixing method and frequency-mixing device using the same A frequency-mixing method includes a step of generating a first quadrature signal having a predetermined frequency, a second quadrature signal having a phase difference of about 180 degrees with respect to a phase of the first quadrature signal, a third quadrature s... | 05/06/2008 |
| 7356326 | Direct-conversion receiver for removing DC offset A direct-conversion receiver for a mobile communication system for substantially removing DC offset to recover an information signal from a carrier signal modulated by the information signal is disclosed. ... | 04/08/2008 |
| 7324787 | Method of ramping up output level of power amplifier of radio communication system, communication semiconductor integrated circuit, and radio communication system In a radio communication system having a phase control loop for phase modulation and an amplitude control loop for amplitude modulation and being capable of time divisional transmission and reception under a predetermined time management, when transmission in a firs... | 01/29/2008 |
| 7315192 | CMOS-based receiver for communications applications A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically injec... | 01/01/2008 |
| 7312716 | Wireless communication using an intrinsically safe design for use in a hazardous area A wireless circuit setup is used in a hazardous area where the circuit is intrinsically safe and does not require explosion proof containment. In this setup, an intrinsically safe master barrier (420) is used without the use of a resistor and one or more resi... | 12/25/2007 |
| 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 |
| 7277687 | Low power amplitude modulation detector An AM demodulator using totem pole complementary metal oxide semiconductor transistors having a feedback to provide a common gate voltage of approximately half that across the transistors in the totem pole. The AM demodulator used in a hearing assistance device and ... | 10/02/2007 |
| 7272370 | Mixers with a plurality of local oscillators and systems based thereon A receiver apparatus including a main input for receiving the input signal and a first standard mixer having a first mixer input, a first local oscillator input, and a first mixer output. The first mixer input is connected to the main input and the first local oscil... | 09/18/2007 |
| 7239889 | Antenna system for GSM/WLAN radio operation An antenna system with two antennas provides the possibility to operate at least two different radio communication systems with one radio communication system operating on one single antenna of the antenna system and another radio communication system operating on b... | 07/03/2007 |
| 7221322 | Dual polarization antenna array with inter-element coupling and associated methods The dual-polarization, slot-mode antenna includes an array of dual-polarization, slot-mode, antenna units carried by a substrate, with each dual-polarization, slot-mode antenna unit having at least four patch antenna elements arranged in spaced apart relation about ... | 05/22/2007 |
| 7212798 | Adaptive AGC in a wireless network receiver An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal ... | 05/01/2007 |
| 7181171 | System and method for providing auxiliary reception in a wireless communications system A system and method for providing auxiliary reception in a wireless communications system includes a wireless communications device. The wireless communications device includes a first antenna and a second antenna. The wireless communications device can, for example... | 02/20/2007 |
| 7177620 | Mixer constant linear range biasing apparatus and method A Gilbert cell mixer for a wireless transceiver includes a first stage that performs voltage to current conversions and that includes first and second transistors that are operated in a saturation region and third and fourth transistors that are operated in a triode... | 02/13/2007 |
| 7177618 | Low noise block down converter with a plurality of local oscillators A low noise block down converter accommodates two local oscillators within one shielding chamber in a metal shielding box and has a conductive bar provided between two dielectric resonators included in the local oscillators respectively. The conductive bar prevents ... | 02/13/2007 |
| 7171184 | Method and apparatus for a gain controlled mixer A gain controlled mixer for an integrated CMOS transceiver. Accuracy of the controlled gain may be relatively invariant over temperature, manufacturing process, and other variations attendant to circuit realizations in a CMOS transceiver, and other realizations. A p... | 01/30/2007 |
| 7167698 | Balanced sub-harmonic mixer A wide band mixer is provided that mitigates local oscillator leakage. A LO signal is provided to a 180 degree splitter that provides a first intermediate LO signal and a second intermediate LO signal 180° out of phase from one another. Since both the first and sec... | 01/23/2007 |
| 7164899 | System and method for frequency translation with harmonic suppression using mixer stages A method for generating phase signals includes triggering a phase register to output a binary number stored in the phase register, wherein the phase register is triggered based at least in part on a voltage signal provided by a voltage controlled oscillator. The met... | 01/16/2007 |
| 7164897 | Method and apparatus for conversion of radio frequency (RF) signals using aperiodic mixing signals An inexpensive, high-performance, fully-integrable, multi-standard transceiver with a topology including: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aper... | 01/16/2007 |
| 7164902 | Filter-integrated even-harmonic mixer and hi-frequency radio communication device using the same Configuration of a connection between an even-harmonic mixer and a filter is simplified, thereby enabling size reduction. An even-harmonic mixer and a high-frequency bandpass filter are connected to each other via a transmission line, thereby forming a filter-integr... | 01/16/2007 |
| 7164905 | High frequency module Heretofore, a plurality of packages were used in a high frequency module in which a plurality of waveguide terminals were positioned resulting in problems, such as degradation of characteristics in the connection lines between packages, lower ease of assembly when m... | 01/16/2007 |
| 7149487 | Mobile communication terminal device and variable gain circuit In receiver systems for cellular phones using the W-CDMA method, the change in DC voltage occurring when the gain of a programmable gain amplifier (PGA circuit) is switched to adjust the gain for a received signal, can be suppressed. A sample-and-hold circuit is ins... | 12/12/2006 |
| 7130595 | Transmitter power amplifier ramping method A method for reducing frequency glitches in a digital transceiver due to power amplifier input impedance variations. According to the method, the power amplifier is switched on after the end of a prior packet reception period and before a new packet transmission beg... | 10/31/2006 |
