Techniques are disclosed to compensate for changes in the impedance of stage(s) preceding a trans-impedance amplifier (TIA) that is used within an RF chain. The techniques identify the changes in the source impedance value of the input stage (e.g., the mixers and LNAs) as a result of a gain state change, which alters the signal-to-transfer function (STF) of the TIA during operation and negatively impacts radio performance. The STF is maintained for changes in the source impedance value throughout different gain states without using switchable shunt components by using tunable elements to compensate for the source impedance changes, thus keeping the STF constant.

Example access network devices are described. One example access network device includes a signal processing apparatus. The signal processing apparatus includes a first power amplifier, a second power amplifier, a first filter, a second filter, and a combiner. The first filter filters a second signal obtained by the first power amplifier, to obtain a first sub-signal belonging to a first frequency band and a second sub-signal belonging to a second frequency band. The second filter filters a fourth signal obtained by the second power amplifier, to obtain n sub-signals including at least a third sub-signal belonging to a third frequency band. The combiner combines the first sub-signal and i sub-signals in the n sub-signals based on a preset condition, to obtain a first combined signal. The communication module sends the first combined signal by using a first port, and sends the second sub-signal by using a second port.

A method for predistorting an input signal of an amplifier device comprises evaluating a selection criterion for a computational model of the amplifier device. The computational model provides an output signal of the amplifier device for the input signal of the amplifier device. Further, the method comprises selecting between a first computational model of the amplifier device and a second computational model of the amplifier device based on the evaluated selection criterion. Additionally, the method comprises predistorting the input signal of the amplifier device using the selected computational model.

A method for predistorting an input signal of an amplifier device comprises evaluating a selection criterion for a computational model of the amplifier device. The computational model provides an output signal of the amplifier device for the input signal of the amplifier device. Further, the method comprises selecting between a first computational model of the amplifier device and a second computational model of the amplifier device based on the evaluated selection criterion. Additionally, the method comprises predistorting the input signal of the amplifier device using the selected computational model.

A multiphase power supply includes a multiphase converter including first and second converters having differing operating phases, each of the first and second converters configured to convert input power into driving power, and transmit the driving power to a power amplifier, a detector configured to detect a voltage based on the driving power, and a duty controller configured to compare an error voltage between an envelope signal of an input signal input into the power amplifier and the detected voltage and sawtooth wave signals having different phases from each other to generate duty control signals, wherein the duty controller compares the error voltage and the sawtooth wave signals with each other using a single comparator.

A multiphase power supply includes a multiphase converter including first and second converters having differing operating phases, each of the first and second converters configured to convert input power into driving power, and transmit the driving power to a power amplifier, a detector configured to detect a voltage based on the driving power, and a duty controller configured to compare an error voltage between an envelope signal of an input signal input into the power amplifier and the detected voltage and sawtooth wave signals having different phases from each other to generate duty control signals, wherein the duty controller compares the error voltage and the sawtooth wave signals with each other using a single comparator.

A system and method for disabling the Wi-Fi on a handheld console whereby the handheld console may have an integrated chip that is a ball grid array whereby each solder ball provides certain voltages or data signals whereby the approach will be determined based on the specific handheld console as well as other factors including new manufacturer integrated chips, chipset architecture, software/firmware changes, or where is the best location on the handheld console for each circuit line to apply the short cut for the circuit to not be completed by either diverting the signal to another location on the logic board such as ground or creating an open line.

A system and method for disabling the Wi-Fi on a handheld console whereby the handheld console may have an integrated chip that is a ball grid array whereby each solder ball provides certain voltages or data signals whereby the approach will be determined based on the specific handheld console as well as other factors including new manufacturer integrated chips, chipset architecture, software/firmware changes, or where is the best location on the handheld console for each circuit line to apply the short cut for the circuit to not be completed by either diverting the signal to another location on the logic board such as ground or creating an open line.

An eVC including coarse and fine tuning networks. The coarse tuning network includes a circuit: receiving a RF input signal from a RF generator; outputting a RF output signal to a reference terminal or load; and receiving a DC bias voltage. The circuit is switched between first and second states. A capacitance of the circuit is based on the DC bias voltage while in the first state and is not based on the DC bias voltage while in the second state. The fine tuning network is connected in parallel with the coarse tuning network and includes a varactor. The varactor includes: a first diode receiving the RF input signal; and a second diode connected in a back-to-back configuration with the first diode and outputting a RF output signal to the reference terminal or load. A capacitance of the varactor is based on a second received DC bias voltage.

A method for developing TDM data with embedded control data includes obtaining signal data and control data, formatting the signal data and the control data into a plurality of channels of a DIN signal, and transmitting the DIN signal on one line of a 3-bit TDM bus. A multichannel input device includes a control extractor receptive to the three-bit TDM bus and operative to extract CNTL data from the DIN data, a DAI receptive to the 3-bit TDM bus and the channel select input and operative to develop a SIGNAL data output, and a DAC block including a DAC, the DAC block being receptive to the SIGNAL data and the CNTL data.