Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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 |
| 7890075 | Mechanism for controlling amplifier gain in a radio receiver A radio receiver such as a frequency modulation (FM) receiver, for example, includes a radio frequency (RF) amplifier having an adjustable gain output. The RF amplifier may be configured to receive and amplify an incoming RF signal. The receiver also includes an int... | 02/15/2011 |
| 7606544 | System for dynamic control of automatic gain control take-over-point and method of operation A receiver for processing a signal comprises a first amplifier circuit and a second amplifier circuit. The first amplifier circuit is operated in association with a first gain profile. The second amplifier circuit is operated in association with a second gain profil... | 10/20/2009 |
| 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 |
| 7286809 | Method and circuit system for suppressing noise in a signal processing circuit Noise impulses are suppressed in a signal processing circuit by gating an input signal. The gated signal is then smoothed upstream of demodulating the smoothed signal as viewed in a signal flow direction from a signal input to a processed signal output. The signal p... | 10/23/2007 |
| 7274409 | Dynamically controlled tuner AGC attack point A tuner is controlled to manage noise and distortion levels in a video signal. The tuner recovers an RF modulated video signal. A video demodulator provides a baseband video signal from the recovered RF modulated video signal. At least one of signal-to-noise ratio (... | 09/25/2007 |
| 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 |
| 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 |
| 7133655 | Amplifiers and amplifying methods for use in telecommunications devices A signal strength indicator circuit that includes a first amplifier configured to receive a first input signal from a first mixer and a second input signal from a second mixer;. The circuit also includes a second amplifier configured to receive a first set of differ... | 11/07/2006 |
| 7116959 | Apparatus for selecting a receiver among a plurality of receivers in a diversity receiver system based upon automatic gain correction A diversity receiver system includes a plurality of radio receivers that each provide a uniquely associated receiver output signal and a uniquely associated receiver control signal indicative of the amount of gain applied by the associated radio receiver to create t... | 10/03/2006 |
| 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 |
| 7099641 | Receiver circuit for mobile radio receivers with automatic gain control A receiver circuit for a mobile radio receiver has a controllable amplifier with a variable gain level, an analog-digital converter stage, a digital filter configuration for the purpose of channel selection and a signal strength estimator. The signal strength estima... | 08/29/2006 |
| 7062244 | Speed-up mode implementation for direct conversion receiver A speed-up mode control system is operative to generate a speed-up mode signal based on a gain control signal from associated digital circuitry. The speed-up mode signal controls electronics associated with one or more amplifiers to facilitate settling time of an ou... | 06/13/2006 |
| 7054604 | Wireless signal amplification system and a television signal decoder comprising one such system A wireless signal amplification system including amplification apparatus (6) consisting of numerous different amplifiers (61 to 6n) which are distributed in an analogue processing chain (4). Also, a converter (12 | 05/30/2006 |
| 7046749 | Narrowband gain control of receiver with digital post filtering An Automatic Gain Control (AGC) circuit as used in a digital receiver that utilizes a main loop filter that is of a relatively wide bandwidth. A pre-filter, wideband variance is determined from the input digital signal, and a post-filter, narrowband variance is also... | 05/16/2006 |
| 7035351 | Automatic gain control loop apparatus A DC offset cancelling circuit with multiple feedback loops suppresses DC offset voltages within an automatic gain control loop apparatus. The apparatus includes a plurality of gain stages connected in series that receive and amplify an input RF signal. Each gain st... | 04/25/2006 |
| 7005922 | Variable gain amplifier circuit and gain control method thereof In order to rapidly control the gains of a plurality of variable gain amplifiers VGAs, each of gain control circuits is configured to determine a gain to be set therein, based on gain control information received from other gain control circuits existing in its prec... | 02/28/2006 |
| 6996386 | Automatic gain control circuit controlling gain of receiver including two automatic gain control amplifiers An A-rail circuit outputs a control signal AGCOUTA whereas a B-rail circuit outputs a control signal AGCOUTB in an AGC circuit. AGCOUTA controls an AGC amplifier (A) while AGCOUTB controls an AGC amplifier (B). A difference value between a power of an input signal a... | 02/07/2006 |
| 6995806 | Amplifier with a universal automatic gain control circuit An amplifier (125) includes a gain stage (210) for amplifying a signal received by the amplifier (125). The amplifier (125) also includes an AGC circuit (400) that adjusts the amplification of the gain stage (210) and that i... | 02/07/2006 |
| 6996200 | Device for use in controlling a sample rate A first device comprises a loop circuit to control a sample rate of a digital circuit element. A circuit comprises a digital loop circuit to control a sample rate of a digital circuit element to be a function of a frequency of a signal received by the circuit. A sec... | 02/07/2006 |
| 6980610 | Wireless terminal device A level of a base band signal at an input side of a variable gain amplification circuit is detected by a logarithmic amplifier having a wide input voltage range at a start of an operation, a control unit then performs a coarse feedforward control on a gain of the va... | 12/27/2005 |
| 6915141 | Secondary automatic gain control loops for direct conversion CDMA receivers A communications device includes a frequency conversion circuit and a control circuit. An antenna receives a radio signal at a first frequency and converts it into a radio frequency (RF) signal of the first frequency. The frequency conversion circuit is associated w... | 07/05/2005 |
| 6904273 | Method and system for automatic gain control in a satellite communications system An apparatus for providing automatic gain control for use in a satellite terminal of a satellite communication system capable of transmitting a plurality of different modes of data. The apparatus includes a demodulator circuit having an analog to digital converter; ... | 06/07/2005 |
| 6904274 | System and method for inverting automatic gain control (AGC) and soft limiting A soft limiter for a signal processor includes a variable-gain amplifier, and a threshold detector. The variable-gain amplifier includes a signal input for receiving an input signal, a signal output for providing an output signal representative of the input signal, ... | 06/07/2005 |
| 6862325 | Multi-standard channel decoder The invention relates to a multi-standard digital receiver, in a digital video transmission system. It comprises a channel decoder for protecting a transmitted signal against channel transmission errors, the channel decoder comprising: ... | 03/01/2005 |
| 6728524 | Automatic gain control circuit for controlling two AGC amplifiers An automatic gain control circuit includes a power calculator for calculating power of a modulation wave supplied to a demodulator; a power comparator for comparing the power calculated by the power calculator with ideal power of a modulation scheme of the modulatio... | 04/27/2004 |
| 6535560 | Coherent adaptive calibration system and method A receiver is adaptively calibrated by using a coherent reference signal. The reference signal is selected to be offset from a center frequency of the calibration signal such that the resultant product is offset from baseband by some small amount. The res... | 03/18/2003 |
| 6498927 | Automatic gain control method for highly integrated communication receiver A wireless or wired communication system and method is provided including a transmitter and a receiver. A RF communication system in accordance with the present invention includes an apparatus and gain control method between RF receiver and baseband modem... | 12/24/2002 |
| 6487419 | Systems and methods for management of current consumption and performance in a receiver down converter of a wireless device Methods, systems and computer program products are provide which control the operation of a receiver of a wireless device so as to reduce the power consumption of the receiver by setting the third order intercept point of a low noise amplifier based upon ... | 11/26/2002 |
| 6418303 | Fast attack automatic gain control (AGC) loop and methodology for narrow band receivers A fast attack Automatic Gain Control (AGC) loop (100) having the capability to selectably shape one or more decaying current sources (242, 260) contained within an off-channel feedback loop and an on-channel feedback loop of the AGC loop by sequentially a... | 07/09/2002 |
| 6324387 | LNA control-circuit for receive closed loop automatic gain control A controlled receive device is disclosed having an amplifier circuit, which receives an input signal, and a control circuit which receives the input signal and outputs a controlled signal to a receiver. The receiver outputs an output signal. A controller ... | 11/27/2001 |
| 6181201 | Automatic gain control circuit for controlling multiple variable gain amplifier stages while estimating received signal power The present invention is a novel and improved AGC circuit which is generically configurable to accommodate a variety of AGC amplifier configurations to enhance IP3 performance and reduce required amplifier current, while providing a received power estimat... | 01/30/2001 |
| 6122331 | Digital automatic gain control An automatic gain control, AGC, circuit comprising with a preferred transition region. A gain correction unit is responsive to an attenuate command and amplify command coming from a feedback system monitoring the AGC's output. The feedback system can indi... | 09/19/2000 |
| 6078796 | Method and apparatus for receiving a wideband signal using multiple automatic gain controllers A receiver (300) for use in a wideband code division multiple access (CDMA) wireless communication system is disclosed. The system conveys at least first and second CDMA signals by a carriers centered at first and second carrier frequencies. The receiver ... | 06/20/2000 |
| 6049361 | Automatic gain control circuit and method therefor An automatic gain control (AGC) circuit of a high definition television (HDTV) signal receiver and a method to compensate for a change in amplitude of a high definition signal. The AGC circuit of the high definition signal receiver includes a non-coherent... | 04/11/2000 |
| 6037999 | Tuner for receiving television signal A television signal receiving tuner comprises a variable attenuating circuit for attenuating an inputted television signal and outputting the attenuated signal, a preamplifying circuit for amplifying the attenuated signal outputted from the variable atten... | 03/14/2000 |
| 6035181 | Apparatus and method for maximizing transmit power output An apparatus (10) and method (100) optimize the transmit output power of a power amplifier (14) while providing for controlled backoff independent of temperature, gain stackup or other common error effects. The apparatus (10) and method (100) are particul... | 03/07/2000 |
| 5999578 | Automatic gain control circuit of radio receiver An automatic gain control circuit which is digitally embodied to prevent deterioration of bit error rate generated by saturation of a low noise amplifier located at the front stage of a receiver through an input of high power to an antenna, thereby simpli... | 12/07/1999 |
| 5943612 | Radio receivers A radio receiver comprising signal receiving means(10), means(12) for adjusting the amplitude of a signal received by said signal receiving means, a signal transmission system(32) coupled to said means for adjusting the signal amplitude, an agc feedback l... | 08/24/1999 |
| 5745847 | Automatic gain control circuit capable of compensating variation of reception level with wide range An RF AGC control circuit (47) gives a first initial voltage signal generated by a first initial level generating circuit (44) to an RF amplifier circuit (22) during a predetermined time duration T, when the channel selection signal was updated or when po... | 04/28/1998 |
| 5742899 | Fast attack automatic gain control (AGC) loop for narrow band receivers A fast attack Automatic Gain Control (AGC) loop (100) having a first feedback loop with selectable responses shapes and a second feedback loop with selectable responses shapes. Response shape selection is based, in part, upon fast pull-down, overshoot rec... | 04/21/1998 |
