Abstract: A radio communication transceiver includes a transformer, a switch, a power amplifier (AP), and a low noise amplifier (LNA). The transformer has a primary winding and a center-tap secondary winding, the primary winding has a first endpoint and a second endpoint, and the center-tap secondary winding has a first endpoint, a second endpoint, and a third endpoint. The switch has a gate, a drain, and a source, in which the gate receives a control signal (CS), the drain is connected to the second endpoint of the primary winding of the transformer through a coupling capacitor, and the source is grounded. The PA has at least one output terminal connected to the first endpoint and the second endpoint of the center-tap secondary winding of the transformer. The LNA has an input terminal connected to the second endpoint of the primary winding of the transformer.

Abstract: An integrated communications system. Comprising a substrate having a receiver disposed on the substrate for converting a received signal to an IF signal. Coupled to a VGA for low voltage applications and coupled to the receiver for processing the IF signal. The VGA includes a bank pair having a first bank of differential pairs of transistors and a second bank of differential pairs of transistors. The bank pair is cross-coupled in parallel, the IF signal is applied to the bank pair decoupled from a control signal used to control transconductance output gain of the bank pair over a range of input voltages. A digital IF demodulator is disposed on the substrate and coupled to the VGA for low voltage applications, for converting the IF signal to a demodulated baseband signal. And a transmitter is disposed on the substrate operating in cooperation with the receiver to establish a two way communications path.

Abstract: In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.

Abstract: Embodiments of a radio frequency (RF) circuit provide translational filtering in accordance with an input impedance response that is an impedance image of a reactive circuit impedance response from a polyphase reactive circuit. The RF circuit may include a first mixer circuit that provides a first frequency offset for the impedance image and a second mixer circuit that provides an additional frequency offset. Accordingly, the second mixer circuit may allow for adjustments to a total frequency offset of the impedance image. The second mixer circuit may also be configured so that the impedance image rejects a negative frequency impedance response of the reactive circuit impedance response.

Abstract: A signal conditioning device, and method thereof, that can be used to maintain an amount of signal RF level adjustment, which is applied to an input, independently of the availability of the power supplied to the device. In one embodiment, the signal condition device comprises an attenuating circuit, which can have a variable attenuator and a non-volatile attenuator. The variable attenuator is configured to provide a primary amount of signal RF level adjustment in a power-on state, and the non-volatile attenuator is configured to store as a secondary amount the primary amount of the signal RF level adjustment. The non-volatile attenuator is likewise configured so that the secondary amount can be applied when the signal conditioning device enters into a power-off state so as to modify the RF level of the input in order to maintain a relative strength of the transmission at a remote device.

Abstract: A wireless communication receiver includes a multitude of look-up tables each storing a multitude of DC offset values associated with the gains of an amplification stage disposed in the wireless communication receiver. The entries for each look-up table are estimated during a stage of the calibration phase. During such a calibration stage, for each selected gain of an amplification stage, a search logic estimates a current DC offset number and compares it to a previous DC offset estimate that is fed back to the search logic. If the difference between the current and previous estimates is less than a predefined threshold value, the current estimate is treated as being associated with the DC offset of the selected gain of the amplification stage and is stored in the look-up table. This process is repeated for each selected gain of each amplification stage of interest until the look-up tables are populated.

Abstract: Aspects of a system for improving efficiency over power control for linear and class AB power amplifiers may include a current source circuit that enables determination of a bias current level for a PA circuit within an IC die based on an amplitude of an input modulation signal. The PA circuit may enable generation of an output signal based on a differential input signal and the input modulation signal to the current source circuit. A generated bias voltage may be applied to a transformer external to the IC die, but internal to an IC package containing the IC die and/or a circuit board containing the IC package. One or more amplifier bias voltage levels may be applied to the PA circuit wherein the amplifier bias voltage levels may be derived from the generated bias voltage level and/or the determined bias current level.

Abstract: Aspects of a system for improving efficiency over power control for linear and class AB power amplifiers may include a current source circuit that enables determination of a bias current level for a PA circuit within an IC die based on an amplitude of an input modulation signal. The PA circuit may enable generation of an output signal based on a differential input signal and the input modulation signal to the current source circuit. A generated bias voltage may be applied to a transformer external to the IC die, but internal to an IC package containing the IC die and/or a circuit board containing the IC package. One or more amplifier bias voltage levels may be applied to the PA circuit wherein the amplifier bias voltage levels may be derived from the generated bias voltage level and/or the determined bias current level.

Abstract: Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.

Abstract: Apparatuses, methods and systems of selecting a gain setting of a receiver chain are disclosed. One method includes bypassing a filter portion of the receiver chain and sampling a bypass receive signal while the filter portion of the receiver chain is bypassed. If the sampled bypass receive signal is determined to be saturated greater than a threshold, then selecting a gain setting of the receive chain as a function of the saturation. Further, the filter portion of the receive chain is included while sampling a receive signal with the selected gain setting.

Abstract: In a wireless communication apparatus, when a first switch electrically connects a second antenna to an impedance matching circuit and a second switch electrically connects a first antenna to a reception circuit, a frequency signal output from an oscillator of the reception circuit is received by the second antenna and applied to the impedance matching circuit. Then, a controller controls the impedance of the impedance matching circuit so as to bring a RSSI voltage output from a signal strength detection circuit of the reception circuit into agreement with a reference RSSI voltage, thereby bringing the reference frequency of the first antenna into agreement with a reference frequency.

Abstract: Methods and systems for an integrated voltage controlled oscillator (VCO)-based transmitter and on-chip power distribution network are disclosed and may include supplying bias voltages and/or ground to a chip utilizing conductive lines. One or more VCOs and low-noise amplifiers (LNAs) may each be coupled to a leaky wave antenna (LWA) integrated in the bias voltage and/or ground lines. One or more clock signals may be generated utilizing the VCOs, which may be transmitted from the LWAs coupled to the VCOs, to the LWAs coupled to the LNAs. RF signals may be transmitted via the LWAs, and may include 60 GHz signals. The LWAs may include microstrip and/or coplanar waveguides, where a cavity length of the LWAs may be dependent on a spacing between conductive lines in the waveguides. The LWAs may be dynamically configured to transmit the clock signals at a desired angle from a surface of the chip.

Abstract: An active splitter circuit arrangement includes a first amplification module having a number of first input ports and first output ports. The first amplification module is configured to provide first stage amplification to a received input signal and produce from the amplified input signal a number of output signals, each substantially matching the input signal. Also included is a first gain control device configured to control a gain of the first amplification module. Next, a number of second amplification modules corresponding to the number of output signals has a number of second input ports respectively coupled to the first output ports. Each second amplification module is configured to receive a control signal from the second gain control device, provide second stage amplification to a corresponding one of the number of output signals based upon the control signal and produce an amplified output signal.

Abstract: Techniques for optimizing gain or noise figure of an RF receiver are disclosed. In an exemplary embodiment a controller controls a capacitor bank between an LNA and a mixer of the RF front end of the receiver. For a given center frequency a first set of capacitors is switched to the mixer and a second set of capacitors is switched to ground. The ratio of capacitance of the second set to the first set of capacitors affects either gain of the RF FE or noise figure of the receiver. Therefore, the RF FE of the receiver may be controlled in such a way as to optimize for either RF FE gain or for receiver noise figure.

Abstract: In the receive subsystem, the analogue-to-digital converter (40) works on the output of the low-noise amplifier (33), at a chosen rate (F), which corresponds to a bandwidth sampling. The processing stages comprise a custom circuit (5), with * an input memory (510) arranged to contain N successive digital samples, renewed at the chosen rate in blocks of M samples, * a complex digital low-pass filtering function (511, 512), of chosen cut-off frequency, operating on the input memory to supply N filtered digital samples (515), * an M-periodic summing function (531) on the N filtered digital samples, supplying M filtered and summed digital samples (533), * an M?M discrete Fourier transform stage (55), operating on these M filtered and summed digital samples, the digital signals on the M outputs (559) of the Fourier transform representing M separate channels, of width defined by the cut-off frequency of the abovementioned low-pass filter.

Abstract: Techniques are disclosed relating to radio frequency (RF) power detection. In one embodiment, a power detection unit is disclosed that includes a multiplier circuit configured to receive a first voltage of a voltage differential signal at gates of a first transistor pair and a second voltage of the voltage differential signal at gates of a second transistor pair. The first multiplier is configured to output a current that varies proportionally to a square of a voltage difference between the first and second voltages. In some embodiments, sources of the first transistor pair are coupled to sources of the second transistor pair, and the sources of the second transistor pair are coupled together. In some embodiments, the power detection unit is configured to compensate for mismatched transistors by applying offset voltages to bodies of transistors in the first and second transistor pairs.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for selecting receiver gain adjustment values. In one aspect, a method includes receiving aggregate signal characteristic values (“aggregate values”) for a plurality of signals being received over active channels of a power line communications network, the aggregate values being computed based on signal characteristic values for each of the signals being received over the active channels. Using the aggregate values, a determination is made that one or more of the aggregate values have been outside of a valid range of signal characteristic values over a specified period. In response to determining that the aggregate values have been outside of the valid range, a receiver gain adjustment value is selected based on the aggregate values and a receiver gain of a receiver that receives the signals is adjusted.

Abstract: To implement a filter circuit with low noise and a low cutoff frequency in a smaller area, a filter circuit has a first circuit which receives an input signal supplied to an input terminal, amplifies the signal, and outputs the amplified signal to an output terminal, a first differential amplification circuit for receiving the output signal of the first circuit through a first capacitance element, a first resistance element for forming a negative feedback path between the input and output of the first differential amplification circuit, and a second resistance element for forming a negative feedback path between the output of the first differential amplification circuit and the input of the first circuit.

Abstract: A receiver for a wireless communication device comprising a mechanism for performing spur mitigation. A spur mitigation unit of the receiver is operable to determine a current estimate of a spur signal from an ADC output signal using a growing box filter. The spur mitigation unit can determine a power of the current estimate of the spur signal and a power of a previous estimate of the spur signal using a power measurement unit. The spur mitigation unit can determine whether the power of the previous estimate of the spur signal is greater than the power of the current estimate of the spur signal. If the power of the previous spur signal estimate is greater than the power of the current spur signal estimate, the spur mitigation unit can remove the spur signal from the ADC output signal based on the previous spur signal estimate.

Abstract: A wireless communication device is disclosed that is capable of reduced power consumption. The device includes several analog components, including some that may be capable of operating at multiple different operation powers and others whose function may be performed by an equivalent digital component. Based on a quality of a received signal, the wireless communication device can adjust a power consumption configuration of its analog components in order to optimize power use. For example, when signal quality is higher than necessary, the device can sacrifice performance to reduce operating power and/or switch to digital equivalent components. Similarly, when signal quality is lower than necessary, the device can enhance performance by increasing operating power and/or switching from digital equivalent components to corresponding analog components.

Abstract: The present invention provides a gain control circuit for an FM receiver that can reduce a reproduced audio output according to the magnitude of the noise component of an intended signal included in a received signal. The gain control circuit of the present invention is constituted by a noise level measurement circuit 26 and a preamplifier 25. The noise level measurement circuit 26 measures a noise level in an audio signal Sa1 output from an FM detector 4 and outputs a control signal Sc corresponding to the noise level. The preamplifier 25 reduces an output according a value of the control signal Sc. With the gain control circuit of the present invention, the volume of the speaker is reduced as the noise component in the audio signal Sa1 increases due to a decrease in received electric field strength, and therefore discomfort caused by unpleasant noise can be reduced.

Abstract: An RF circuit is disclosed having a low-noise amplification (LNA) circuit and a bypass path that provides a bypass around the LNA circuit. In the amplification mode, the bypass path is open and the LNA circuit amplifies the receive signal in accordance within a power gain frequency response. During the amplification mode, the LNA circuit is tuned such that a power gain resonance frequency band of the power gain frequency response is within the receive frequency band. On the other hand, in the bypass mode, the bypass path is closed and the receive signal is not amplified but rather bypasses the LNA circuit. Also, during the bypass mode, the power gain frequency response of the LNA circuit is transposed to reduce or eliminate excessive insertion losses caused by the LNA circuit within the receive frequency band.

Abstract: A receiver is provided and includes a first amplifier configured to amplify, based on a first gain, a radio frequency signal to generate a first amplified signal. The radio frequency signal is received by the receiver on a first channel. A second amplifier generates, based on the first amplified signal and a second gain, a second amplified signal. An output circuit generates a baseband signal based on the second amplified signal. A first detection circuit compares the baseband signal to (i) a first threshold in response to the first gain being at a first level, and (ii) a second threshold in response to the first gain being at a second level. The first detection circuit generates a first detection signal in response to the comparison. A controller, in response to the first detection signal, (i) adjusts the second gain, or (ii) changes the receiver from the first channel.

Abstract: A first low noise amplifier (LNA) applies a gain to both (a) signals conforming to a first communication protocol and (b) signals conforming to a second communication protocol. A second LNA applies a gain to the signals conforming to the first communication protocol. A third LNA applies a gain to the signals conforming to the second communication protocol is provided. A first signal strength indicator corresponding to a signal strength of a first signal, conforming to the first communication protocol, is determined. A second signal strength indicator corresponding to a signal strength of a second signal, conforming to the second communication protocol, is determined. The gain of the first LNA is controlled based on (i) the first signal strength indicator and ii) the second signal strength indicator. The gains of the second and third LNAs are controlled based on the first and second signal strength indicators, respectively.

Abstract: There is provided a method for use in a wireless communication to avoid detection of a false modulated signal in a paged device. In one embodiment, a modulated signal is received by the paged device. Then, the modulated signal is identified by the paged device as a preliminary false modulated signal. Thereafter, the gain of at least one paged device amplifier and/or a matching threshold of the paged device is reduced by the paged device to decrease a sensitivity of the paged device to avoid detection of a future false modulated signal. In one embodiment, the wireless communication is a Bluetooth wireless communication and the paged device is a Bluetooth enabled device. An exemplary system for implementing one embodiment of the disclosed method is described.

Abstract: Disclosed herein is a signal processing device including an adjustment section configured to adjust the power of each of subinterval signals by multiplying the subinterval signals by a gain adapted to bring the power to a given level, the subinterval signals being input signals each having a frequency component of one of a plurality of subintervals into which the frequency band over which the power spectrum is to be measured is divided, and a correction section configured to correct the power of each of the subinterval signals, whose power has been adjusted by the adjustment section, by multiplying the power spectrum by the reciprocal of the gain used for adjustment of the power by the adjustment section.

Abstract: A wireless device that simultaneously transmits first wireless signals according to a first protocol and second wireless signals according to a second protocol. The wireless device may comprise an antenna, first wireless protocol circuitry, second wireless protocol circuitry, a switch, and at least one gain element. The first wireless protocol circuitry sends first signals according to the first wireless protocol. The second wireless protocol circuitry sends second signals according to the second wireless protocol. The switch comprises a combiner. The switch receives the first signals and the second signals, combines the first signals and the second signals to produce third signals having aspects of the first signals and the second signals, and sends the third signals to a gain element. The gain element amplifies the third signals and sends the amplified third signals to the antenna. The antenna wirelessly transmits the amplified third signals.

Abstract: In accordance with some embodiments of the present disclosure an attenuating circuit comprises a balun configured to receive a radio frequency (RF) signal at first and second input ports and configured to output the RF signal. The circuit further comprises an attenuator coupled in parallel with the first and second input ports. A power level of the RF signal output by the balun is based at least partially on an impedance of the attenuator. The attenuator comprises a resistor ladder configured to receive at least a portion of the RF signal and a plurality of switches coupled to the resistor ladder. The plurality of switches are configured to open and close such that the impedance of the attenuator is a function of which switches are open and closed. Therefore, the power of the RF signal is controlled based at least on the opening and closing of the switches.

Abstract: A mobile station (14) transmits a signal after connection is established, by using the same number of subcarriers as the number of subcarriers equal to or smaller than a predetermined number used for transmitting a connection request signal (TCCH). A base station (12) detects the number of subcarriers used for transmitting the connection request signal (TCCH) (S106), and controls in accordance with the detected number of subcarriers the passband width of a bandpass filter having a passband with a variable width accommodating the predetected number of subcarriers, for separating a signal of the mobile station (14) falling within the passband from a received signal (S108).

Abstract: Embodiments of an RF receiver front-end are presented herein. In an embodiment, the RF receiver front-end comprises a transconductance LNA, a passive mixer, and a gm-enhanced common-gate buffer. The transconductance LNA is configured to convert an RF voltage signal to an RF current signal and provide the RF current signal at an output. The passive mixer is coupled to the output of the transconductance LNA and is configured to mix the RF current signal with a local oscillator signal to produce a frequency translated current signal. The gm-enhanced common-gate buffer is configured to receive the frequency translated current signal at an input and convert the frequency translated current signal to a frequency translated voltage signal. In an embodiment, the input of the gm-enhanced common-gate buffer is configured to provide a low input impedance to limit a voltage swing of the frequency translated current signal.

Abstract: A gain controller for controlling the gain of at least one amplifier in a receiver, the gain controller being arranged to, when the receiver is receiving a signal: for a first period of time, repeatedly determine an indication of the strength of the received signal and adjust the gain of the at least one amplifier in dependence on each indication of signal strength and following the expiry of the first period of time: determine a subsequent indication of the strength of the received signal and make a single adjustment of the gain of the at least one amplifier in dependence on the subsequent indication of signal strength.

Abstract: Adaptive gain regulation is performed by measuring one or more real-time closed-loop statistics for a signal output from a gain-controllable circuit and blindly adjusting the gain of the gain-controllable circuit based on the one or more real-time closed-loop statistics measured for the signal so that the signal output by the gain-controllable circuit satisfies a predetermined criteria without using a priori information about the signal.

Abstract: Systems and methods which provide a multimode tuner architecture implementing direct frequency conversion are shown. Embodiments provide a highly integrated configuration wherein low noise amplifier, tuner, analog and digital channel filter, and analog demodulator functionality are provided in a single integrated circuit. A LNA of embodiments implements a multi-path configuration with seamless switching to provide desired gain control while meeting noise and linearity design parameters. Embodiments of the invention implement in-phase and quadrature (IQ) equalization and a multimode channelization filter architecture to facilitate the use of direct frequency conversion. Embodiments implement spur avoidance techniques for improving tuner system operation and output using a clock signal generation architecture in which a system clock, sampling clock frequencies, local oscillator (LO) reference clock frequencies, and/or the like are dynamically movable.

Abstract: Embodiments of a radio frequency (RF) receiver implementing one or more forms of protection to protect devices of the RF receiver from in-band interferers is provided. The RF receiver includes an integrated circuit terminal configured to couple a RF signal received at an antenna to a RF signal path, and a low noise amplifier (LNA) coupled to the RF signal path and configured to amplify the RF signal to provide an amplified RF signal. To protect the LNA from in-band interferers, the RF receiver can further include one or more clamping circuits and/or an over-voltage detector to determine if a peak of the RF signal exceeds an acceptable level.

Abstract: Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.

Abstract: A television signal processing apparatus comprising a receiver comprises a distortion estimator and an automatic gain control signal generator. The automatic gain control signal generator generates a plurality of automatic gain control and filter response control signals in response to the magnitude or signal to noise ratio of an RF signal and a non-linear distortion figure generated from the information carried by said RF signal. The distortion estimator uses a plurality of statistical methods to generate a non-linear distortion figure from the signal constellation of the information carried by said RF signal.

Abstract: A transmit power control system includes: an output power estimator for estimating a transmit power of a transmitter; and a transmit power controller responsive to the output power estimator and to compare this with a requested power in order to calculate a target power which takes account of errors within the transmit power control system, and to vary a gain of an amplifier in a transmit signal path so as to reduce an error between the transmit power of the amplifier and the requested power.

Abstract: A power amplifier module includes a first power amplifier, a second power amplifier, and a controlling module. The first power amplifier has an amplification set for optimal efficiency in accordance with most probable transmit power level settings within a transmit power level range. The second power amplifier has an amplification set for optimal efficiency in accordance with the most probable transmit power level settings within the transmit power level range. The controlling module is coupled to: enable one of the first and second power amplifiers to amplify an outbound radio frequency (RF) signal in accordance with a power setting when the power setting is not within the most probable transmit power level settings; and enable at least one of the first and second power amplifiers to amplify the outbound RF signal in accordance with the power setting when the power setting is within the most probable transmit power level settings.

Abstract: Methods and systems for utilizing a leaky wave antenna as a load on a power amplifier are disclosed and may include configuring one or more leaky wave antennas as a load for one or more power amplifiers (PAs) in a wireless device. RF signals may be transmitted via the leaky wave antennas which may be integrated on the chip, a package to which the chip is affixed, or on a printed circuit board to which the chip is affixed. The antennas may include an inductive load and/or a balun for the one or more PAs. The leaky wave antennas may be impedance matched to the PAs. The PAs may amplify a signal to be transmitted, and an output power of the PAs may be configured by controlling a bias voltage for the PAs.

Abstract: An active splitter circuit arrangement includes a first amplification module having a number of first input ports and first output ports. The first amplification module is configured to provide first stage amplification to a received input signal and produce from the amplified input signal a number of output signals, each substantially matching the input signal. Also included is a first gain control device having a number of gain input ports respectively coupled to the first output ports and a gain output port coupled to at least one of the first input ports. The first gain control device is configured to control a gain of the first amplification module. Next, a number of second amplification modules corresponding to the number of output signals has a number of second input ports respectively coupled to the first output ports.

Abstract: A difference between an output current signal (mos) of the mixing circuit (MC) and a current from a controlled current source (CCS) is conducted to an input of an operational amplifier (A). A control voltage (cv) for said current source is a voltage at the output of the operational amplifier (A) being filtered by a low-pass filter, whose limiting frequency equals a low frequency limit of the modulation signal in the received signal (rs). The method is speeded up in that the limiting frequency of the low-pass filter is increased by two to three orders of magnitude at the beginning and is gradually lowered to said value. A rather short time duration of the transient process is achieved so that the working point with a low voltage of the DC component and low-frequency components is set at least five times faster than so far.

Abstract: A method for compensating for audio signal distortion in a mobile terminal includes generating a digital audio signal at a gain, amplifying the digital audio signal into an amplified audio signal, reproducing the amplified audio signal, determining whether the amplified audio signal is distorted on the basis of at least one reference voltage, and adjusting the gain if the amplified audio signal is distorted.

Abstract: A wireless communication device that obtains an analog received signal by receiving a wireless signal, adjusts amplitude by a variable gain amplifier, converts the analog received signal into a digital received signal by an A/D converter and obtains user data by demodulating the digital received signal, including: a received signal strength indication detecting section that detects a received signal strength indication that fluctuates over time; a gain controlling section that controls a gain of the variable gain amplifier; a propagation environment judging section that judges a propagation environment level of the wireless signal, and a time constant controlling section that controls a time constant, based on the judged propagation environment level such that the time constant becomes larger as the propagation environment level becomes lower, the time constant regulating a change speed of the gain at the variable gain amplifier.

Abstract: Aspects of the disclosure provide a receiver that can include a robust automatic gain control (AGC) mechanism. The receiver can include at least a first processing stage and a second processing stage. Each of at least the first processing stage and the second processing stage can include a controllable parameter. Further, the receiver can include a detector module. The detector module can switchably detect an output parameter of each of at least the first processing stage and the second processing stage. In addition, the receiver can include a controller module. The controller module can be configured to control the controllable parameters of at least the first processing stage and the second processing stage based on the detected output parameters of at least the first processing stage and the second processing stage.

Abstract: A method for use in a digital communications receiver for controlling an input signal level (200) into an analog-to-digital converter (ADC) initially receives a sample sequence (201) where a threshold crossing rate is measured as a percentage samples of an input signal that exceed the threshold (203). The error between the measured threshold crossing rate and a desired reference threshold crossing rate is calculated (205) and an error signal is then utilized in a feedback loop to control the receiver gain such that the error is reduced (207).

Abstract: According to one embodiment, an electronic apparatus includes an input module, a tuner, an amplifier and a preset module. The input module receives a television broadcast signal. The tuner selects a television broadcast signal of a target channel from television broadcast signals of channels receivable by way of the input module. The amplifier amplifies the television broadcast signal supplied to the tuner. The preset module determines whether each of the channels is receivable or unreceivable and to turn on or turn off of the amplifier, based on a first reception status information of the television broadcast signal of the reception channel acquired from the tuner in a state that the amplifier is on and a second reception status information of the television broadcast signal of the reception channel acquired from the tuner in a state that the amplifier is off.

Abstract: Disclosed is a system and method of adjusting a volume level for an audio signal for a communication device to comply with a quality threshold. The method comprises: obtaining a digitized signal value of the audio signal and monitoring for an increase in the volume level. In the method, upon determining that implementing the increase in the volume level would produce an output that would exceed the quality threshold, processing the signal value to produce a first output signal value for the audio signal utilizing a digital signal processing (DSP) device in the communication device, a processing filter defined in the digital signal processing device, a first set of adjustment parameters and the signal value.

Abstract: Methods and systems for a low noise amplifier utilizing a leaky wave antenna are disclosed and may include one or more low-noise amplifiers (LNAs) coupled to one or more leaky wave antennas (LWAs) in a wireless device. RF signals may be received via one or more LNAs coupled to one or more feed points on a LWA. The one or more LNAs may be coupled to the feed points based on an impedance of the feed points and an input impedance of the one or more LNAs. The impedance of the feed points may be configured by locating them along a vertical axis in a resonant cavity of the LWA. The LWAs may be integrated on a chip, and/or on a package or printed circuit board to which the chip is affixed. The RF signals may be amplified by the LNAs and may be down-converted to baseband signals.

Abstract: Automatic gain control method and apparatus control a gain of a received signal. While the gain is adjusted and thus converges, a finding mode is entered to additionally change the gain at least once according to at least one characteristic value obtained from a relationship between the gain and time, such that the gain approaches a target level. In other embodiments, a tracking mode is further entered to periodically adjust the gain at a period greater than that before when signal strength is being tracked to reduce noise energy introduced. Hence, the embodiments can improve a gain converging speed and reduce the influence of the noise on the communication system in a dynamic receiving environment, and thus enhance the signal receiving performance.

Abstract: A communication device supporting multiple wireless protocols may share a common gain element in a coordinated manner. A first wireless protocol circuitry of the communication device may enter an active state, and in response to entering the active state, may determine whether a second wireless protocol circuitry of the communication device is active and whether the common gain element is currently shared. The gain element may be adjustable to amplify signals by an adjustable amount. The first wireless protocol circuitry may take control of the gain element from the second wireless protocol circuitry in response to determining that the second wireless protocol circuitry is active and the gain element is currently shared.