Abstract: Systems and methods are provided. In this regard, a representative system incorporates a crystal oscillator circuit and a digital automatic level control circuit. The digital automatic level control circuit is operative to: convert an oscillation amplitude of the crystal oscillator circuit to a proportional DC voltage; convert the DC voltage to a corresponding digital code representation; and adjust bias current and oscillator loop gain such that a desired oscillation amplitude is set.

Abstract: The invention is a height adjustable gun rest that can be attached, and carried folded, on a rifle's fore-end. Known gun rests are in particular unsuitable on snow, and therefore unsuitable for grouse top-hunting for instance. Loud or awkward folding, or unsuitable exterior form (for carrying the rifle on the back), are other problems relevant to this kind of hunting. The invention includes a supporting leg 1, a bearing plate 2, and a pivot catch 3. The fore-end 101 can be imagined as the upper horizontal bar of a “Z” where the supporting leg, pivoted to the fore-end, is the inclined line and the bearing plate, pivoted to the supporting leg, is the lower horizontal bar. This arrangement facilitates compact and simple folding. The bearing plate provides large contact surface. The pivot catch fix the leg's inclination angle; that is, one of the angles of the “Z” is constant while the other is variable.

Abstract: A method for adjusting the signal to noise ratio of a receiver comprises measuring the peak power for an RF signal and determining, based on the measured peak power, whether the RF signal power is within a desired operating range. The method further includes adjusting an RF attenuation for the receiver, when it is determined that the RF signal power is not within the desired operating rang. The method further comprises measuring a peak power foe an IF signal, determining based on the measured peak power, whether the IF signal power is within a desired operating range, and adjusting an IF attenuation for the receiver, when it is determined that the IF signal peak power is not within the desired operating range.

Abstract: A fully integrated single-loop frequency synthesizer, which can serve as a local oscillator for a broadband tuner, is disclosed, thus allowing the creation of a single-chip solution for broadband applications. The tank circuits are integrated into the tuner chip through the combination of a phase-locked loop and multiple on-chip VCOs comprising narrow-tuning range varactors. Drift in the VCOs caused by heat is overcome by designing the VCOs to overlap each other. Initial tolerance problems associated with the VCOs are overcome by the use of a calibration method. The calibration of the VCOs is accomplished by utilizing the lock detect output of the phase-locked loop and a binary search algorithm. The edges of each VCO are determined with this calibration method, thereby enabling VCO selection based on the desired channel. A sufficient number of VCOs are provided such that whatever the initial tolerance shift, the full broadband spectrum can still be covered after calibration.

Abstract: A simultaneous multiple channel receiver (“SMCR”) for receiving a combined signal having a plurality of carrier signals, where each carrier signal in the plurality of carriers signals corresponds to a frequency channel, and in response, simultaneously producing a plurality of output data stream signals, is disclosed. The SMCR may include a down-converter front-end capable of receiving the combined signal, a plurality of digital signal processors, wherein each digital signal processor of the plurality of digital signal processors is capable of producing an output data stream signal of the plurality of output data stream signals, and a multi-band filter in signal communication with both the down-converter front-end and the plurality of digital signal processors.

Abstract: A Multi-carrier Switch Converter (“MCSC”) for multiplexing a plurality of input signals received at the MCSC into a single MCSC output signal is disclosed. The MCSC may include a Multi-port Selector Switch, wherein the Multi-port Selector Switch receives the plurality of input signals and produces a Multi-port Selector Switch output, wherein the Multi-port Selector Switch output includes a plurality of switched output signals and a frequency translation block in signal communication with the Multi-port Selector Switch, wherein the frequency translation block receives the Multi-port Selector Switch output and frequency translates each switched output signal of the plurality of switched output signals to plurality of translated signals, wherein each translated signal has a fixed carrier frequency.

Abstract: A television tuner for tuning analog and digital television signals that requires only one off-chip filter. An integrated first frequency stage up-converts the received signal to a higher frequency. An off-chip filter provides coarse tuning of the up-converted signal. An integrated second frequency stage separates and down-converts the signal into I and Q components having a low IF in a range of 10-15 MHz. An integrated on-chip filter finely tunes the I and Q components. Where tuning of both analog and digital signals is contemplated, the on-chip filter is an image rejection filter. Where tuning of only digital signals is contemplated, the on-chip filter may be a DC notch filter.

Abstract: A fully integrated single-loop frequency synthesizer, which can serve as a local oscillator for a broadband tuner, is disclosed, thus allowing the creation of a single-chip solution for broadband applications. The tank circuits are integrated into the tuner chip through the combination of a phase-locked loop and multiple on-chip VCOs comprising narrow-tuning range varactors. Drift in the VCOs caused by heat is overcome by designing the VCOs to overlap each other. Initial tolerance problems associated with the VCOs are overcome by the use of a calibration method. The calibration of the VCOs is accomplished by utilizing the lock detect output of the phase-locked loop and a binary search algorithm. The edges of each VCO are determined with this calibration method, thereby enabling VCO selection based on the desired channel. A sufficient number of VCOs are provided such that whatever the initial tolerance shift, the full broadband spectrum can still be covered after calibration.

Abstract: A fully integrated single-loop frequency synthesizer, which can serve as a local oscillator for a broadband tuner, is disclosed, thus allowing the creation of a single-chip solution for broadband applications. The tank circuits are integrated into the tuner chip through the combination of a phase-locked loop and multiple on-chip VCOs comprising narrow-tuning range varactors. Drift in the VCOs caused by heat is overcome by designing the VCOs to overlap each other. Initial tolerance problems associated with the VCOs are overcome by the use of a calibration method. The calibration of the VCOs is accomplished by utilizing the lock detect output of the phase-locked loop and a binary search algorithm. The edges of each VCO are determined with this calibration method, thereby enabling VCO selection based on the desired channel. A sufficient number of VCOs are provided such that whatever the initial tolerance shift, the full broadband spectrum can still be covered after calibration.

Abstract: A cable television receiver includes in-band and out-of-band tuners integrated on a single IC. A mode controller determines whether an out-of-band signal is being received and powers the out-of-band tuner off when no out-of-band signal is present. A signal divider divides the signals between the in-band and out-of-band tuners and may be an asymmetric coupler in order to provide a higher power signal to the in-band tuner and a lower power signal to the out-of-band tuner.

Abstract: An integrated tuner is programmable to optimize its components for either analog signal reception or digital signal reception. Power to the components is increased for analog operation and decreased for digital operation. The tuner also includes a selectable and integrated low noise amplifier that may be selected for single-signal reception and bypassed for multi-signal reception.

Abstract: A highly efficient radio frequency (RF) transmitter provides both wide bandwidth and an extended power control range. The RF transmitter includes stage switching, bias adjustment, and drain supply modulation. These components are used to provide fine and coarse power control and EER envelope fluctuations. The RF transmitter is useful in wireless communications to increase both handset talk time and battery life.

Abstract: A highly efficient radio frequency (RF) transmitter provides both wide bandwidth and an extended power control range. The RF transmitter includes stage switching, bias adjustment, and drain supply modulation. These components are used to provide fine and coarse power control and EER envelope fluctuations. The RF transmitter is useful in wireless communications to increase both handset talk time and battery life.

Abstract: A power amplifier that amplifies an electrical signal that is passed through a power amplification array. The power amplifier is employed in various applications including cellular telephones, radio frequency signal transmission, and other electrical signal applications requiring power amplification. The power amplifier contains a number of power amplifiers arranged in a power amplifier array. To reproduce a particular envelope profile, a selected number of the power amplifiers of the power amplifier array is switched ON, whereas another selected number of the power amplifiers of the power amplifier array are switched OFF. All elements are fed with an RF signal containing phase information as well. The amplified, output signal provided after the power amplifier array is fed to an antenna for signal transmission.