Abstract: A digital-to-analog converter circuit including one or more digital-to-analog converter cells and a separate voltage protection circuit connected by a common output node. A first digital-to-analog converter cell includes a first transistor which is configured to be switched to a conductive state when the first digital-to-analog converter cell is activated. A first terminal of the first transistor is coupled to a defined potential, wherein a second terminal of the first transistor is coupled to a common output node of the one or more digital-to-analog converter cells. The digital-to-analog converter circuit further includes a voltage protection circuit coupled between the common output node of the one or more digital-to-analog converter cells and an output node of the digital-to-analog converter circuit to regulate a voltage between the common output node and the defined potential.

Abstract: A digital-to-analog converter circuit is provided. The digital-to-analog converter circuit includes one or more digital-to-analog converter cells. A first digital-to-analog converter cell includes a first transistor which is configured to be switched to a conductive state when the first digital-to-analog converter cell is activated. A first terminal of the first transistor is coupled to a defined potential, wherein a second terminal of the first transistor is coupled to a common output node of the one or more digital-to-analog converter cells. The digital-to-analog converter circuit further includes a voltage protection circuit coupled between the common output node of the one or more digital-to-analog converter cells and an output node of the digital-to-analog converter circuit to regulate a voltage between the common output node and the defined potential.

Abstract: A method and an apparatus provide a plurality of modulated signals by frequency shifting an output signal of a carrier signal generation circuit for obtaining a first carrier signal and a second carrier signal, and by modulating the first and second carrier signals.

Abstract: A communication system includes a first DAC array, a second DAC array, and a merge component. The first DAC array is configured to receive a first portion of modulation signals and to generate a first RF signal according to a modulation mode. The second DAC array is configured to receive a second portion of the modulation signals and to generate a second RF signal according to the modulation mode. The merge component is configured to receive the first RF signal and the second RF signal. The merge component is also configured to generate an output RF signal according to the first RF signal and the second RF signal, wherein the output RF signal has a modulation format according to the modulation mode.

Abstract: A method and an apparatus provide a plurality of modulated signals by frequency shifting an output signal of a carrier signal generation circuit for obtaining a first carrier signal and a second carrier signal, and by modulating the first and second carrier signals.

Abstract: An RF-DAC cell is configured to generate an RF output signal based on a baseband signal, a first signal and a second signal. The first signal has a first duty cycle and toggles between first predefined amplitude values, and the second signal has a second duty cycle smaller than the first duty cycle and toggles between second predefined amplitude values.

Abstract: A communication system includes a first DAC array, a second DAC array, and a merge component. The first DAC array is configured to receive a first portion of modulation signals and to generate a first RF signal according to a modulation mode. The second DAC array is configured to receive a second portion of the modulation signals and to generate a second RF signal according to the modulation mode. The merge component is configured to receive the first RF signal and the second RF signal. The merge component is also configured to generate an output RF signal according to the first RF signal and the second RF signal, wherein the output RF signal has a modulation format according to the modulation mode.

Abstract: An envelope detector includes an input receiving a digital input signal indicative of a magnitude of a signal to be amplified by a power amplifier. A circuit is provided for generating an analog envelope signal based on the digital input signal. The envelope detector includes an output for outputting the analog envelope signal.

Abstract: An envelope detector includes an input receiving a digital input signal indicative of a magnitude of a signal to be amplified by a power amplifier. A circuit is provided for generating an analog envelope signal based on the digital input signal. The envelope detector includes an output for outputting the analog envelope signal.

Abstract: An RF-DAC cell is configured to generate an RF output signal based on a baseband signal, a first signal and a second signal. The first signal has a first duty cycle and toggles between first predefined amplitude values, and the second signal has a second duty cycle smaller than the first duty cycle and toggles between second predefined amplitude values.