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8169546 |
Technique for tuner automatic gain control circuit for mobile television applications
A technique for providing stable tracking performance to an AGC loop circuit comprises amplifying a wideband radio frequency signal; detecting signals and blockers adjacent to the radio frequency...
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8145166 |
Enhanced programmable automatic level control
An enhanced programmable automatic level control loop comprising an input for receiving an input RF signal; a level modulator, wherein the level modulator receives the input RF signal and a control...
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8107910 |
Differential to single-ended conversion for radio frequency devices
In an exemplary embodiment, a circuit is disclosed comprising a plurality of inputs, each input to receive a radio frequency waveform from a plurality of differential input waveforms having...
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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...
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8095101 |
Receiving device and related method for calibrating DC offset
A receiving device includes a mixer, an AC coupling circuit, a post-stage circuit, and a DC offset calibration circuit. The mixer is utilized for mixing an input signal with a local oscillating...
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8090331 |
Method and apparatus for compensating code channel power in a transmitter
It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative...
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8085839 |
Adaptive equalization system and method having a lock-up-free quantized feedback DC restoration circuit
An adaptive equalizer may include one or more equalizing gain stages coupled to an input signal. An automatic gain control circuit may be used to control the gain of the one or more equalizing gain...
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8078126 |
Communication apparatus and low noise amplifying method
A communication apparatus and a low noise amplifying method. The communication apparatus includes a gain adjusting unit to adjust a gain of an input signal; a combiner to generate an output signal...
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8055231 |
RF feedback engine coupled to receiver low noise amplifier
Methods and apparatus to perform radio frequency (RF) analog-to-digital conversion are described. According to one example, a receiver includes an amplifier to amplify received analog RF signals...
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8055229 |
Low noise, highly linear amplifying stage and signal receiver using the same
The invention provides a signal amplifying stage, used in a signal receiver. The signal amplifying stage has: a fixed-gain low noise amplifier (LNA), amplifying an input signal; a variable-gain LNA...
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8045941 |
Methods and apparatus to implement receiver linearity enhancement
Methods and apparatus to implement receiver linearity enhancement are described. One example method includes controlling receiver gain by determining a level of a received signal that is to be...
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8036618 |
Auto gain controller and control method thereof
An auto gain controller (AGC) and a control method thereof are provided. An input signal is amplified by a radio frequency (RF) amplifier and an intermediate frequency (IF) amplifier. When strength...
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8032099 |
Automatic gain control circuit using gain shift
An AGC circuit includes a low noise RF amplifying module with an adjustable gain, a frequency converter, an IF/Baseband amplifying module with an adjustable gain, an A/D converter, an AGC module...
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8027647 |
Broadcasting receiving apparatus and method thereof
Provided are a broadcasting receiving apparatus and a broadcasting receiving method using the same. The broadcasting receiving apparatus including: a low noise amplifying unit low-noise-amplifying...
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8023598 |
Automatic gain control method and apparatus for wireless communication systems
A system and method are provided for automatic gain control (AGC) using an adaptive reference and a threshold. An adaptive reference allows for adjusting the target power based on variations in...
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7995977 |
High frequency power detector circuit and radio communication device
First and second envelope detector circuits have, respectively, a resistance row, a capacitative element connected to the resistance row in parallel and a transistor connected between a connection...
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7945226 |
Method and circuit for adaptive automatic gain control
A method for adaptive automatic gain control and an automatic gain control circuit are provided. A predetermined waveform is injected into the automatic gain control circuit. A signal is sampled at...
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7920840 |
Wireless receiver apparatus provided with gain control amplifier
In a wireless receiver apparatus including a gain control amplifier for controlling a gain of a reception signal, a maintaining device compulsorily maintains the gain of the gain control amplifier...
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7912436 |
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...
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7899419 |
Method and apparatus for compensating code channel power in a transmitter
It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative...
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7894772 |
Low distortion radio frequency (RF) limiter
A limiter for minimizing an amount of phase change caused by input amplitude variation includes a variable gain amplifier configured to receive a signal having an amplitude component and a phase...
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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...
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7885625 |
RF A/D converter with phased feedback to low noise amplifier
Methods and apparatus to perform radio frequency (RF) analog-to-digital conversion are described. According to one example, a receiver includes an amplifier to amplify received analog RF signals...
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7817978 |
Method for eliminating interference in measuring 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...
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7805121 |
Radio signal receiver and gain control method thereof
A radio signal receiver in which a RF-receiving unit 12 converts a radio received signal to a baseband signal, an AD-conversion unit 15a, 15b converts that baseband received signal to a digital...
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7787841 |
Receiving module and receiving device using the same
The demodulator in the receiving module of the invention supplies a signal produced based on a signal level detected by a first detector to a second amplifier as an amplification degree adjustment...
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7787847 |
Front end and high frequency receiver having quadrature low noise amplifier
A front end and a high frequency receiver provided therewith are described, which front end comprises a quadrature low noise amplifier as a low noise amplifier. A high isolation between local...
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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...
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7756499 |
Receiver and amplification-gain controlling device thereof
The receiver comprises a variable gain amplification unit, a mixing unit, a filtering unit, and three compensation unit. Each compensation unit detects powers of the signal amplified in the...
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7738847 |
Automatic gain control for a tuner
The circuit arrangement comprises a tuner with a control amplifier and a mixer connected downstream, and an automatic gain control. The automatic gain control contains a weighting filter, which is...
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7693501 |
Techniques to deterministically reduce signal interference
Techniques are described that can be used to reduce interference in a desired channel by one or more other channels. A radio includes a level detect logic that is responsive to both the frequency...
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7672359 |
Spread-spectrum receivers with extended dynamic range
A received analog spread-spectrum signal is selectively attenuated prior to digitization, where the amount of attenuation is based on the amplitude of the digitized signal before the digitized...
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7650132 |
Low noise amplifier (LNA) gain switch circuit
A circuit is formed to steer current in and out of an inductive load in a manner that enables an amplifier to provide a plurality of gain steps without modifying an LC time constant for the circuit...
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7620380 |
Adjustable automatic gain control
A method for adjusting automatic gain control (AGC) of a radio receiver begins when a primary AGC module establishes an AGC setting for the radio receiver to produce a primary AGC setting. The...
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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...
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7596355 |
System and method capable of closed loop MIMO calibration
An embodiment of the present invention provides a method of closed loop MIMO calibration in a wireless communication system, comprising detecting that station calibration is obsolete and requires...
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7583937 |
Digital interface and related event manager for integrated circuits
In one embodiment, the present invention includes a method for receiving at a transceiver from a baseband processor digital control information that includes both event and schedule information,...
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7577414 |
Methods and apparatus for automatic gain control in broadband tuners
In one aspect, an automatic gain control (AGC) for applying a variable gain to a broadband signal is provided. The AGC comprises a variable gain amplifier adapted to receive the broadband signal as...
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7567784 |
Tuner, broadcast signal processing apparatus comprising the same, and broadcast signal processing method
A tuner, a broadcast signal processing apparatus and method, which satisfy reception sensitivity of both terrestrial and cable televisions, when selecting a broadcast signal through a single...
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7565123 |
Apparatus for voltage level temperature compensation
An apparatus is provided for improved temperature compensation of received RF signals. An RF receiver includes receiver circuitry which receives an RF signal and demodulates it to generate an...
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7548738 |
Peak detector
A receiver includes a gain stage, a peak detector and a processor. The gain stage provides an output signal, and the peak detector provides a binary indication of whether the output signal has...
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7539509 |
Small signal threshold and proportional gain distributed digital communications
An apparatus for gain distribution in a system comprising a plurality of distributed antennas and a total system dynamic range is disclosed. The apparatus includes means for sensing a signal level...
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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...
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7526043 |
High speed line equalizer and method thereof
The present invention relates to a high speed line equalizer and a method thereof. The high speed line equalizer receives and amplifies one clock signal and at least more than one data signal. The...
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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...
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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...
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7496375 |
Transmission power control device
A transmission power control apparatus which reduces the number of steps required for adjustments of the transmission power control apparatus and performs transmission power control with high...
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7489911 |
Signal receiver and method for controlling gain of a tuner
A signal receiver (300) has a tuner (301), which receives an RF_IN signal and outputs a desired IF_OUT intermediate frequency signal to a demodulator (311). The demodulator (311), on the basis of...
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7489912 |
Signal receiver and method for optimizing gain of a tuner
A signal receiver (300) has a tuner (301), which receives an RF_IN signal and outputs a desired IF_OUT intermediate frequency signal to a demodulator (311). The demodulator (311) controls the...
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7486941 |
Method and apparatus for dynamic gain and phase compensations
Dynamic gain and phase compensation is provided in a radio frequency (RF) receiver (106) including at least one switched Low Noise Amplifier (LNA) (212) coupled to an RF gain control unit (226)...
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