Abstract:
Embodiments relate to outphasing amplifiers and amplification. One example system includes a signal splitter configured to receive an input signal and output a plurality of signals, wherein the signal splitter shifts each of the plurality of signals by a distinct phase based at least in part on a power of the input signal; a plurality of power amplifiers (PAs), each configured to amplify a distinct signal of the plurality of signals to generate a distinct amplified signal; a plurality of input matching networks, each coupled to a distinct PA of the plurality of PAs and configured to transform an input impedance of the coupled PA to an outphasing load condition based on the distinct signal the coupled PA is configured to amplify; and a combiner configured to combine the plurality of distinct amplified signals to generate an amplified input signal.
Abstract:
A peaking amplifier is disclosed. The peaking amplifier includes a driver stage, a final stage, and an interstage matching network. The driver stage has a load impedance and is configured to generate a driver output based on an input signal. The final stage has a final stage input impedance and is configured to generate a peaking output based on the driver output. The interstage matching network is coupled to the driver stage and the final stage. The interstage matching network is configured to transform the final stage input impedance to the load impedance for the driver stage when the peaking amplifier is ON and to provide a short to an input of the final stage when the peaking amplifier is in an OFF state.
Abstract:
Devices and methods for generating a bias voltage for a transceiver operating in time division multiplexing operation, and corresponding transceivers are provided. In this case, the bias voltage is controlled in guard intervals between transmission and reception of signals by the transceiver.
Abstract:
A device includes at least one electrically conductive structure and at least one stripline. The stripline includes stripline sections that are connected to one another in a series connection between a first terminal and a second terminal. A first subset of the stripline sections is arranged on a first side of the conductive structure and a second subset of the stripline sections is arranged on a second side of the conductive structure. The device also includes at least one conductive connection between the first subset of the stripline sections and the second subset of the stripline sections, wherein the at least one conductive connection is isolated from the at least one electrically conductive structure.
Abstract:
A pulse width modulation system comprises an analog component and a digital component. The analog component operates to separate a local oscillator signal with different phase shifts and introduce an offset (i.e., a time delay) to analog signals being receive at an input with a tuning operation that fine tunes in the analog signals in the analog (continuous time) domain. The analog component comprises a plurality of analog delay lines that respectively process carrier signals having a different phase shifts. Digital delay lines convert the analog signals to digital square waves with the same time delay and at the same resolution as the analog output signal.
Abstract:
Embodiments relate to outphasing amplifiers and amplification. One example system includes a signal splitter configured to receive an input signal and output a plurality of signals, wherein the signal splitter shifts each of the plurality of signals by a distinct phase based at least in part on a power of the input signal; a plurality of power amplifiers (PAs), each configured to amplify a distinct signal of the plurality of signals to generate a distinct amplified signal; a plurality of input matching networks, each coupled to a distinct PA of the plurality of PAs and configured to transform an input impedance of the coupled PA to an outphasing load condition based on the distinct signal the coupled PA is configured to amplify; and a combiner configured to combine the plurality of distinct amplified signals to generate an amplified input signal.
Abstract:
The present disclosure relates to a low-complexity transmitter architecture that drives phase modulators with digital signals to generate a pulse width modulated (PWM) signal that is transmitted by an antenna. In some embodiments, the system has a pre-processing element that generates first and second digital control signals from a digital baseband signal. A first phase modulation component introduces a first phase shift into a first local oscillator signal based upon the first control signal and generates a first digital signal corresponding to the first phase shift. A second phase modulation component introduces a second phase shift into the first local oscillator signal based upon the second control signal and generates a second digital signal corresponding to the second phase shift. A combination element is configured to combine the first and second digital output signals to generate an RF pulse width modulated (RF-PWM) signal.
Abstract:
A nonlinear distorter is configured to mitigate nonlinearity from a nonlinear component of a nonlinear system. The nonlinear distorter operates to model the nonlinearity as a function of a piecewise polynomial approximation applied to segments of a nonlinear function of the nonlinearity. The nonlinear distorter generates a model output that decreases the nonlinearity of the nonlinear component.
Abstract:
A nonlinear distorter is configured to mitigate nonlinearity from a nonlinear component of a nonlinear system. The nonlinear distorter operates to model the nonlinearity as a function of a piecewise polynomial approximation applied to segments of a nonlinear function of the nonlinearity. The nonlinear distorter generates a model output that decreases the nonlinearity of the nonlinear component.
Abstract:
In accordance with an embodiment, a method for operating a millimeter-wave power amplifier including an input transistor having an output node coupled to a load path of a cascode transistor includes: receiving a millimeter-wave transmit signal at a control node of the input transistor; amplifying the millimeter-wave transmit signal to form an output signal; providing the output signal to a load coupled to an output node of the cascode transistor; and adjusting a first DC bias current of the input transistor to form a substantially constant second DC bias current of the cascode transistor.