Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8135369 | Communication device The attenuation characteristics of an attenuator largely changes depending on the frequency of an input signal. Accordingly, a difference between the amounts of attenuation of gains of each two attenuators included in a communication device is not constant. In commu... | 03/13/2012 |
| 8131241 | Linear voltage controlled variable attenuator with linear DB/V gain slope A variable attenuator and method of attenuating a signal is presented. The variable attenuator contains an input that receives an input signal to be attenuated. A voltage divider between a resistor and parallel MOSFETs provides the attenuated input signal. The MOSFE... | 03/06/2012 |
| 7929934 | Identification information reader and printer including the same An identification information reader includes an antenna commonly used for transmission of a radio wave to a radio frequency identification tag and reception of a radio wave that has been modulated with at least identification information and transmitted from a radi... | 04/19/2011 |
| 7860473 | Systems and methods for providing millimeter wave signal improvements A radio frequency receiver includes a receiver circuit for processing RF signals, an antenna to receive millimeter wave RF signals, and an attenuator circuit, coupled between the receiver circuit and antenna. In one embodiment, the attenuator circuit may be used to ... | 12/28/2010 |
| 7583945 | Amplifier with improved noise performance and extended gain control range An amplifier and method of amplifying a signal is presented. The amplifier contains a fixed gain stage, a digitally controllable gain stage, and a continuously variable attenuator connected between the fixed and controllable gain stages. The attenuator and controlla... | 09/01/2009 |
| 7546101 | Variable attenuation of broadband differential signals using PIN diodes Disclosed herein is a system for the variable attenuation of broadband differential signals. An exemplary system of variable attenuation of broadband differential signals includes attenuation devices arranged such that an attenuation device on the positive side of t... | 06/09/2009 |
| 7505748 | Linear voltage controlled variable attenuator with linear DB/V gain slope A variable attenuator and method of attenuating a signal is presented. The variable attenuator contains an input that receives an input signal to be attenuated. A voltage divider between a resistor and parallel MOSFETs provides the attenuated input signal. The MOSFE... | 03/17/2009 |
| 7454182 | Attenuator with switch function and mobile telephone terminal device using the same A high frequency part, which amplifies a high frequency signal outputted from an intermediate frequency part and supplies to an antenna, is equipped with a gain controller with switch function. The gain controller with switch function comprises an attenuator with sw... | 11/18/2008 |
| 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 |
| 7359686 | Radio-frequency amplifier system A device for measuring voltage levels includes a root mean square (RMS) detector. The RMS detector includes a linear multiplier, a log converter, a low-pass filter and a temperature compensator. The linear multiplier multiplies a voltage of an input signal by the vo... | 04/15/2008 |
| 7352259 | Broadband step attenuator with improved time domain performance An integrated step attenuator (“ISA”) monolithically integrated on a single chip for adjusting an input signal. The ISA may include a step attenuation network (“SAN”) that may include at least one switchable attenuation section, and at least one electronical... | 04/01/2008 |
| 7327991 | Pulse modulation circuit Provided is a pulse modulation circuit that improves the on/off operation and improves the on/off ratio of an output power of the entire pulse modulation circuit in the switching operation. The pulse modulation circuit inputs a local oscillation wave and a DC pulse ... | 02/05/2008 |
| 7317902 | Successive log video pad power detector and method A power detector which samples the output signal from a communications device and produces a control signal proportional to the transmit power level, comprising a series of diode detectors where the sampled signal is divided between the diode detectors by an attenua... | 01/08/2008 |
| 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 |
| 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 |
| 7289777 | Power control for non-constant envelope modulation There is disclosed a method and apparatus for control of a power control loop. The method comprises the steps of: amplifying a non-constant envelope modulation signal to thereby produce an output signal; combining a power level control signal with a signal represent... | 10/30/2007 |
| 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 |
| 7280618 | Digital baseband receiver including a high pass filter compensation module for suppressing group delay variation distortion incurred due to analog high pass filter deficiencies A digital baseband (DBB) radio frequency (RF) receiver includes a digital high pass filter compensation (HPFC) module used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFs) in the receiver. The digital HPFC module ... | 10/09/2007 |
| 7277511 | Two-stage non-linear filter for analog signal gain control in an OFDM receiver An analog signal gain control circuit(ASGC) for a digital radio HomePlug orthogonal frequency division multiplexing (OFDM) receiver includes a digital variable gain amplifier (DVGA) to control the gain of a received signal to achieve a desired signal amplitude to ma... | 10/02/2007 |
| 7260374 | Method for controlling power level of received signal in ultra wide band transmission system Disclosed is a method for controlling power level of received signal in an ultra wide band transmission system which uses multi frequency bands, and includes a pre-gain controller (PGC) and a voltage gain amplifier (VGA). The method for controlling a power level of ... | 08/21/2007 |
| 7254421 | Configurable wireless computer communication attenuation device Systems, methodologies, and other embodiments associated with reconfiguring a wireless computer communication device by processing an output signal provided by the device are described. One exemplary system embodiment includes an attenuation circuit configured to at... | 08/07/2007 |
| 7245895 | Attenuator with switch function and mobile telephone terminal device using the same A high frequency part, which amplifies a high frequency signal outputted from an intermediate frequency part and supplies to an antenna, is equipped with a gain controller with switch function. The gain controller with switch function comprises an attenuator with sw... | 07/17/2007 |
| 7231308 | Test system dynamic range extension through compression compensation A method for extending dynamic range and a test system with extended dynamic range compensate for a compression effect on measured data caused by a receiver channel of the test system being compressed. The measured data is magnitude and phase data for one of a devic... | 06/12/2007 |
| 7225001 | System and method for distributed noise suppression The present invention advantageously provides a manner by which to further suppress noise superimposed upon an information signal without increasing distortion to the signal, e.g., speech. By distributing the noise suppression, the quality of the information signal ... | 05/29/2007 |
| 7215937 | Radio wave reception device, radio wave clock, and repeater A received low-frequency standard radio wave, which is an amplitude modulation signal, is converted to an intermediate frequency signal Sa, and is output to a detection circuit and an AGC circuit. The detection circuit and AGC circuit generates an RF control signal ... | 05/08/2007 |
| 7209078 | Antenna array calibration A smart antenna calibration system is disclosed for calibrating an antenna array having a plurality of antennas. Each antenna has a calibration coupler for providing a monitoring signal indicative of a signal passing through a transceiver associated thereof, and a p... | 04/24/2007 |
| 7184730 | Automatic gain control system having a wide range of continuous gain control An automatic gain control system (100) and methods thereof for a receiver for providing a wide range of continuous gain control has been discussed. The AGC includes an input stage (120) for providing an indication of a strength of a received signal; an... | 02/27/2007 |
| 7184731 | Variable attenuator system and method A variable attenuator comprising a first attenuator for attenuating a RF signal according to a fixed voltage, a second attenuator connected in parallel to the first attenuator and attenuating the RF signal according to a control voltage for determining an attenuatio... | 02/27/2007 |
| 7171176 | Tuner system self adaptive to signal environment A circuit and method for adjusting the operating characteristics of a tuner in accordance with information derived from the signals being processed by the tuner. Depending upon signal type and/or signal strength, the power levels of certain components are adjusted a... | 01/30/2007 |
| 7167693 | Scanning receiver for use in power amplifier linearization A feed forward power amplifier system and method identify active channels across a frequency band to suppress unwanted intermodulation distortion (IMD) products in a communications signal such as a single- or multi-carrier communications signal. A scanning receiver ... | 01/23/2007 |
| 7137047 | Method and apparatus for selection of ARQ parameters and estimation of improved communications The present invention includes a method for selecting appropriate forward error correction and automatic repeat request parameters for protection of a multicarrier communication channel. The multicarrier communication channel may be wired or wireless. Particular asp... | 11/14/2006 |
| 7130602 | Dynamically programmable receiver Disclosed is a novel and improved dynamically programmable linear receiver which provides the required level of system performance with reduced power consumption. In one embodiment, disclosed is a programmable receiver coupled to a jammer detector for detecting the ... | 10/31/2006 |
| 7127211 | Method and apparatus for reduced intermodulation distortion in a radio transceiver A transceiver transmits first and second signals on first and second transmit radio frequencies. After detecting a received signal, intermodulation distortion caused by transmission of the first and second signals is suppressed, reduced, and/or eliminated using info... | 10/24/2006 |
| 7127224 | Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency A base band circuit forms a part of an automatic gain controller incorporated in a direct conversion receiver, and includes a series of variable gain amplifiers controlled by a gain controller and a feedback loop connected between the output node and the input node ... | 10/24/2006 |
| 7116958 | Interference rejection in a radio receiver The use of wideband or software defined radio is attractive in terms of cost reduction since it allows re-use of base stations for different transmission modes. However, wideband radio also introduces the problem of how to deal with high level interfering signals. P... | 10/03/2006 |
| 7110735 | Automatic gain control system An example automatic gain control (AGC) system in which an adder adds a radio frequency (RF) signal power of only the low-frequency component of an RF signal and an intermediate-frequency (IF) signal of an output from a variable-gain intermediate-frequency amplifier... | 09/19/2006 |
| 7107033 | Smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end A smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end. More specifically, this is provided for by a smart radio incorporating Parascan® varactors embodied within an intelligent adaptive RF front end that comprises at ... | 09/12/2006 |
| 7107030 | Transmitter and a modulator therefor A transmitter for a portable radio communication apparatus comprising a modulator having first port for inputting a baseband signal and a second port for inputting a local oscillator signal, and including means for rectifying the input local oscillator signal to pro... | 09/12/2006 |
| 7103335 | Receiver used in spread spectrum communication system In a receiver used in the spread spectrum communication system, power of a base band signal which is obtained by A/D converting an output of a quadrature demodulator is detected by a base band signal power-detecting unit, where the quadrature demodulator demodulates... | 09/05/2006 |
| 7103377 | Small signal threshold and proportional gain distributed digital communications A method for signal gain adjustment in a multi-port, digital distributed antenna system uses a sorter to sort received signals in ascending order according to their signal levels. A threshold comparator generates a dynamic range fair threshold that is updated as any... | 09/05/2006 |
