Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8155618 | Receiving device for frequency modulated signals with voltage-limited reference input to demodulated signal binarization comparator A waveform shaping circuit wave-shapes a demodulated signal after FM demodulation to generate a binary value. A smoothing circuit smoothes the demodulated signal to generate a reference voltage. A comparator compares the reference voltage with the demodulated signal... | 04/10/2012 |
| 8135375 | Receiver having a gain-controllable stage A gain-controllable stage (CLN, A1, A2 . . . , A7, ACC) comprises a reactive signal divider (CLN) followed by an amplifier arrangement (A1, A2 . . . , A7, ACC). The reactive signal divider (CLN) may be in the form of, for ex... | 03/13/2012 |
| 7734274 | Narrow-band detections of a received signal The frequency of an RF signal to be transmitted is modulated at the transmitting unit, and the modulation information is used by the receiving unit to filter out any unwanted noise. The modulation information may be used to retrieve associated filter coefficients th... | 06/08/2010 |
| 7680477 | Integrated radio frequency filters for multiband transceivers A system and method integrates signal filters in a multiband transceiver. A preferred embodiment comprises an amplifier with a first tunable capacitor coupled to a signal input and a tunable filter. The tunable filter comprises an input stage with a first pair of in... | 03/16/2010 |
| 7616939 | Receiver and electronic device using the same A receiver and an electronic device are provided that suppress deterioration of the signal waveform of a symbol. The receiver has a filter that sends out an output signal having a symbol at an arbitrary time interval; and an intermittent operation part that controls... | 11/10/2009 |
| 7499695 | Configurable all-digital coherent demodulator system for spread spectrum applications A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimat... | 03/03/2009 |
| 7444132 | Apparatus, and associated method, for facilitating dynamic filtering of a receive signal Apparatus, and an associated method, for adaptively controlling filter characteristics of a filter forming part of a receive station, such as a mobile station operable in a cellular communication system. An adaptive parameter unit is provided with signal representat... | 10/28/2008 |
| 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 |
| 7433668 | Controlling Q-factor of filters The present invention provides a method and an apparatus for controlling a Q-factor for a filter. The method comprises stabilizing an active feedback to provide a variable feedback in a filter, varying the active feedback based on an input signal to the filter, and ... | 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 |
| 7421252 | Center frequency control of an integrated phase rotator band-pass filter using VCO coarse trim bits A phase rotator for a Cartesian feedback power amplifier in a transmitter final stage contains an integrated voltage controlled tunable resonant circuit accomplishing band-pass filtering at a center frequency selected by local oscillator (LO) coarse trim control sig... | 09/02/2008 |
| 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 |
| 7398065 | Programmable sampling band pass filter A variable bandwidth, sampled analog filter can be programmed to have a variety of responses. A variable bandwidth, sampled analog filter is preferably a sampled analog resonator based filter that receives a bandwidth control input and a sample clock input. The samp... | 07/08/2008 |
| 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 |
| 7376400 | System and method for digital radio receiver A communications system comprising a processor, a variable oscillator, a radio frequency (RF) quadrature demodulator, a variable capacitor, a continuous-time, sigma-delta analog-to-digital converter (ADC), and a frequency divider, all integrated on a single semicond... | 05/20/2008 |
| 7373125 | Off-channel signal detector with programmable hysteresis A communication module includes a variable gain amplifier, a mixer stage responsive to the variable gain amplifier, a post-mixer amplifier stage responsive to the mixer stage, and an off-channel signal detector responsive to the post-mixer amplifier stage. The post-... | 05/13/2008 |
| 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 |
| 7355484 | Oscillator and radar apparatus using the same An oscillator and a radar apparatus that includes a resonator electro-magnetically connected to a micro strip line and a rotor connected to the resonator by capacitance. The bottom surface of the rotor has a changing height in the circumferential direction of the ro... | 04/08/2008 |
| 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 |
| 7333790 | Method and apparatus for generating arbitrary phase shift using a phase shifter based on adding two perpendicular vectors with variable gains A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a secon... | 02/19/2008 |
| 7333791 | Use of an image reject mixer in a forward data channel tuner Disclosed are systems and methods which utilize an image reject mixer in an out-of-band mixer application such as in a forward data channel frequency converter. For example, according to a preferred embodiment, an image reject mixer is utilized to provide a relative... | 02/19/2008 |
| 7333467 | Receiver circuit and method using selectively variable amplification for receiving time signals from different transmitters A time signal carrying encoded time information transmitted at a transmission frequency from any one of plural time signal transmitters is received, amplified, and evaluated to acquire the time information. The transmission frequency of the received time signal is d... | 02/19/2008 |
| 7315730 | Architecture for a receiver front end having dual output low noise amplifier driving separate pre-selectors coupled to a transformer for single ended output An architecture for a receiver front end utilizes a dual output low noise amplifier (102) driving separate, fixed preselectors (104, 106) coupled to a transformer (108) to generate a single ended output (113). A pair of blocks coupled in ... | 01/01/2008 |
| 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 |
| 7288977 | High resolution pulse width modulator A pulse width modulator (100) and method that facilitates high resolution pulse width modulation is provided. The pulse width modulator (100) creates a pulse width modulated signal having a duty cycle that is proportional to a controllable delay in the... | 10/30/2007 |
| 7289784 | Active tunable filter circuit An active tunable filter circuit for use as an integratable active filter in a mobile radio apparatus, comprises an active amplifier circuit (A) including a reactive feedback network including a first tunable element (L1) set to pass with amplification a want... | 10/30/2007 |
| 7286804 | Receiver digital-analog converter and tuning circuit An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constitu... | 10/23/2007 |
| 7286811 | Local oscillator apparatus and method A direct conversion satellite tuner is fully integrated on a common substrate. The integrated tuner receives an RF signal having a plurality of channels and down-converts a selected channel directly to baseband for further processing. The integrated tuner includes o... | 10/23/2007 |
| 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 |
| 7283840 | Reconfigurable analog baseband for a single-chip dual-mode transceiver A dual-mode analog baseband circuit is implementable on a single IC with reduced chip area. The baseband portion of the IC includes a single dual-mode complex filter that is reconfigurable to be a filter for Bluetooth signals or for wireless local area network (wire... | 10/16/2007 |
| 7266465 | Wideband digital IFM receiver with frequency confirmation An apparatus for confirming a frequency measurement of a received signal includes a discrete Fourier transform (DFT) module for receiving a sampled digital signal. The DFT module is configured to analyze the received sampled digital signal, and output amplitude valu... | 09/04/2007 |
| 7251466 | Television receiver including an integrated band selection filter A tuner circuit includes a band selection filter coupled to receive an input RF signal and provide a band selected output signal where the band selection filter includes a bank of band pass filters. Each band pass filter includes an inductor and a variable capacitor... | 07/31/2007 |
| 7236756 | Tuning signal generator and method thereof A front end tuning system includes a tuning signal generator. The tuning signal generator includes a digital-to-analog converter (DAC) to receive a pre-conditioned tuning signal at a reference input, to receive a digital value at a digital control input, and to prod... | 06/26/2007 |
| 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 |
| 7221958 | Received signal filtering for enhanced selectivity A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is useful in removing adjacent channel interference in a received W-CDMA si... | 05/22/2007 |
| 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 |
| 7215931 | Method and apparatus for up-and-down-conversion of radio frequency (RF) signals This patent describes a method and system which overcomes the LO-leakage problem during modulation and demodulation, common to direct conversion and similar RF transmitters and receivers. This problem is solved using a virtual local oscillator (VLO™) signal which ... | 05/08/2007 |
| 7215939 | Apparatus and method for detecting ripples caused by multipath propagation and controlling receiving antenna and tuner Improved signal reception is provided in a digital television signal received by identifying and mitigating multipath signal effects prior to demodulation and equalization. According to an exemplary embodiment, a digital television signal is received having multipat... | 05/08/2007 |
