Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 8103234 | Automatic gain control using signal and interference power to obtain extended blocking performance In a radio including analog and digital portions, with at least one A/D converter between the analog and digital portions, and the selectivity of the radio at least partly implemented in the digital domain, an AGC controller sets a first variable gain amplifier (VGA... | 01/24/2012 |
| RE41582 | S-band low-noise amplifier with self-adjusting bias for improved power consumption and dynamic range in a mobile environment A discrete low-noise amplifier designed to operate in a mobile wireless environment uses two cascaded GaAs FETs to achieve 25 dB gain and 0.9 dB noise figure at 2.5 GHz. Active bias control circuitry responsive to monitored amplifier output power automatically and c... | 08/24/2010 |
| 7536159 | Automatic gain control using signal and interference power to obtain extended blocking performance In a radio including analog and digital portions, with at least one A/D Convener between the analog and digital portions, and the selectivity of the radio at least partly implemented in the digital domain, an AGC controller sets a first variable gain amplifier (VGA)... | 05/19/2009 |
| 7515891 | Programmable gain amplifier (PGA) with AGC in receiver section A method and apparatus for dynamically controlling a programmable gain amplifier (PGA) to provide a plurality of gain steps thereby providing automatic gain control (AGC) in a receiver intermediate frequency (IF) stage comprising a succession of operational amplifie... | 04/07/2009 |
| 7499687 | Wireless transmitter DC offset recalibration In many circuits, including those operating in radio frequency (RF), there is commonly a need to perform DC offset cancellation. The DC offset is an error in an output signal in respect to the input that may cause a circuit to enter into undesirable or non-tolerable... | 03/03/2009 |
| 7447490 | In-situ gain calibration of radio frequency devices using thermal noise An apparatus for calibrating gain of an radio frequency receiver (“Rx”) is disclosed to provide, among other things, a structure for performing in-situ gain calibration of an RF integrated circuit over time and/or over temperature without removing the RF integra... | 11/04/2008 |
| 7440738 | Automatic gain control with two power detectors A receiver (100) adjusts its overall gain based on the detected power level of an incoming signal. The receiver is built with two detectors (D1, D2) which operate with different detecting ranges within the dynamic range of the incoming signal. I... | 10/21/2008 |
| 7437133 | Radio frequency tuner front end and tuner A front end for a radio frequency tuner, for example for connection to a cable distribution network, including an input connected to a signal path comprising an LNA connected via an AGC stage to a signal splitter. The input path has a bandwidth sufficiently wide to ... | 10/14/2008 |
| 7433662 | Mixer gain control with gain tracking offsets An apparatus and method to use a gain control network across source terminals of cascode transistors that drive a differential current to control gain. The drains of the cascode transistors are coupled to a load such as a mixer. The cascode arrangement provides high... | 10/07/2008 |
| 7433663 | Automatic gain control system for multiple receiving antennae A multiple receiving antennae system having a plurality of radio frequency (RF) modules being responsive to incoming signals for processing the same to generate baseband signals. The multiple receiving antennae system further processes baseband signals to generate d... | 10/07/2008 |
| 7430406 | Gain control in a wireless device This disclosure is directed to techniques that can be executed by a wireless device to perform various signal processing tasks associated with wireless communication. The techniques involve gain state switching based on an output of an analog-to-digital (A/D) conver... | 09/30/2008 |
| 7415259 | Automatic gain control for satellite digital audio radio service receiver, method of automatically controlling gain and SDARS receiver incorporating the same An automatic gain control (AGC) for a Satellite Digital Audio Radio Service (SDARS) receiver, a method of automatically controlling gain and a SDARS receiver incorporating the AGC or the method. In one embodiment, the AGC includes: (1) an AGC function selector confi... | 08/19/2008 |
| 7409197 | Transceiver with receive path overload protection and method A transceiver includes a detuning circuit to generate an impedance mismatch in a receive signal path in response to a control signal provided by loop-control circuitry. The loop-control circuitry generates the control signal based on a comparison of detected peak si... | 08/05/2008 |
| 7403757 | Automatic gain control method in wireless packet communication system The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calc... | 07/22/2008 |
| 7403759 | Method for the filtering of noise from measured signals The present invention concerns a method for eliminating interference in measuring signals (SM) which are corrupted by pulsed interference signals (SST) having a known or determinable interference pulse interval (TSt), whereby the det... | 07/22/2008 |
| 7386285 | Automatic gain control adaptive for plural modulation schemes An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, ... | 06/10/2008 |
| 7359690 | Single path front end with digital AGC in SDARS system A method and apparatus for automatically controlling the gain of a digital radio receiving circuit in which a single set of analogue amplifiers is used as the front end to feed two separate digital back-end, demodulating circuits, and in which, for optimal performan... | 04/15/2008 |
| 7356322 | Multiple-branch wireless receiver A wireless receiver detects signals received at two or more antennas, with each antenna coupled to an input receive chain. A switch is employed to couple selected input receive chains to one or more corresponding output receive chains during listening, coarse-detect... | 04/08/2008 |
| 7336936 | Radio signal receiving apparatus and radio signal receiving method Herein disclosed is a radio signal receiving apparatus for receiving radio signals each having a base band signal component, comprising: radio signal amplifying means for amplifying the radio signals each having a signal level; base band signal producing means for p... | 02/26/2008 |
| 7332964 | Gain-step transconductor A gain-step transconductor circuit operates with multiple gain values. The gain can be stepped from one gain value to another by selecting a different signal path between an input node and an output amplifier. The output amplifier may operate as a common source ampl... | 02/19/2008 |
| 7327294 | Gain compensation based on a first gain factor and a second gain factor with time-varying compensation An automatic gain control circuit has a gain determination circuit (B2) which determines a first gain factor (g), and a first gain controller (B3) which controls an amplitude of an input signal (S1) with the first gain factor (g) to supply a gai... | 02/05/2008 |
| 7327298 | Gigabit ethernet line driver and hybrid architecture A gigabit ethernet line driver includes a transmitter having both transmitter and active hybrid outputs. The transmitter consists of a plurality of transmitter clusters each connected to both the transmitter and active hybrid outputs. Each transmitter cluster includ... | 02/05/2008 |
| 7321266 | Current-matching variable gain amplifier A current-matching variable gain amplifier is provided. The amplifier comprises a reference current source, at least one cascode amplifier, a matching circuit, a control circuit, and at least one first blocking circuit. The reference current source provides a refere... | 01/22/2008 |
| 7317894 | Satellite digital radio broadcast receiver A satellite digital radio broadcast receiver has an integrated circuit including a first reception series for processing a satellite wave signal from a satellite and a second reception series for processing a ground wave signal from a repeater in order to receive bo... | 01/08/2008 |
| 7313377 | System, method, and circuit for dynamic range enhancement in a communication system A circuit includes one or more first amplifiers operable to amplify an incoming signal to produce an amplified incoming signal. The incoming signal is associated with a desired signal. The circuit also includes a controller. In response to the amplified incoming sig... | 12/25/2007 |
| 7313378 | Tracking automatic gain control An automatic gain control provides for enhanced acquisition and tracking of wireless signals. The wireless signals may include signals using electrostatic fields, magnetic fields, or electromagnetic fields. In an embodiment, wireless signals are provided as radio fr... | 12/25/2007 |
| 7305218 | RF switch An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the ... | 12/04/2007 |
| 7299021 | Method and apparatus for scaling the dynamic range of a receiver for continuously optimizing performance versus power consumption Methods and apparatus are disclosed for operating a RF receiver. The method executes, during operation of the RF receiver, by periodically determining existing RF receiver operational conditions; determining RF receiver performance requirements based at least in par... | 11/20/2007 |
| 7295820 | Method and apparatus for DC offset control An automatic gain control (AGC) circuit has an automatic gain controlled amplifier connected in series with a DC blocking capacitor. A reference DC voltage is selectively applied to an input of the automatic gain controlled amplifier and to an output of the DC block... | 11/13/2007 |
| 7283797 | System and method of improving the dynamic range of a receiver in the presence of a narrowband interfering signal An apparatus, system, and method improve the dynamic range of a receiver in the presence of a narrowband interfering signal. An error rate of a received signal is computed, and the input intercept point of a low noise amplifier in the receiver is adjusted based on t... | 10/16/2007 |
| 7277685 | Automatic gain control of multiple antenna OFDM receiver A method includes amplifying the plurality of received signals, generating a plurality of time domain samples of the amplified signals with at least an analog-to-digital converter (ADC), determining at least a candidate power according to root-mean-square (RMS) powe... | 10/02/2007 |
| 7272371 | Radio receiver and radio receiving method A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback cont... | 09/18/2007 |
| 7263143 | System and method for statistically directing automatic gain control The present invention is directed to a system and method which statistically determines when regularly occurring interference events of a predictable duration will occur, for example radar pulses and dynamically adjusts an automatic gain control (AGC) for RF data tr... | 08/28/2007 |
| 7262641 | Current differential buffer The present technique relates to a method and apparatus for operating a differential buffer. In the differential buffer, a first stage may include a differential pair configured to receive input signals and generate output signals. The first stage may also include a... | 08/28/2007 |
| 7257178 | Base band circuit of receiver and low cut-off frequency control method A base band circuit of a receiver and a low cut-off frequency control means can quickly converge transition state due to gain fluctuation with setting a low cut-off frequency of a high-pass filter as low as possible. The base band circuit of a receiver has a variabl... | 08/14/2007 |
| 7248847 | System and method for adaptively controlling receiver gain switch points Accordingly, a system and method are provided for adaptively controlling amplification in a wireless communications device receiver. The method comprises: receiving a signal with a variable signal strength; amplifying the received signal in response to the signal st... | 07/24/2007 |
| 7242915 | Timing based LNA gain adjustment in an RF receiver to compensate for intermodulation interference A Radio Frequency (RF) receiver includes a low noise amplifier (LNA) and a mixer coupled to the output of the LNA. The gain of the LNA is adjusted to maximize signal-to-noise ratio of the mixer and to force the mixer to operate well within its linear region when an ... | 07/10/2007 |
| 7242914 | Method of automatic gain control for multiple receiver front-ends A gain processor circuit calculates a first AGC signal for a first one of a number of receive chains, each including a gain-controlled front-end circuit, and derives one or more additional AGC signals from the calculation of that first AGC signal for any remaining c... | 07/10/2007 |
| 7218905 | Gain compensation A receiver front end is provided with a low-noise amplifier (LNA), a linearity on demand (LOD) circuit, and a gain calibration device. The LOD circuit provides current to the LNA depending on linearity requirements. The gain calibration device monitors the amount of... | 05/15/2007 |
| 7218175 | Dynamic feedback linearization An apparatus comprising an amplifier comprising at least one amplifier transistor, a threshold detection network and a bypass capacitor. The amplifier may be configured to generate an output signal at a collector in response to an input signal received at a base. Th... | 05/15/2007 |
