Circuit for transmitting ASK RF signals with data signal edge adaptation

摘要

The circuit is provided for the transmission of data amplitude modulated radio frequency signals. The circuit includes a local oscillator for generating an oscillating signal at a determined carrier frequency, a unit for shaping data pulses to supply a data amplitude modulation control signal (Vmod), and a power amplifier receiving the oscillating signal and the data amplitude modulation control signal (Vmod) for the transmission of data amplitude modulated radio frequency signals by an antenna or an antenna arrangement. The data pulse shaping unit (13) includes a pulse shaper (21) for digitally adapting the data transition edges on the basis of an incoming digital data signal (d), and a digital-analog conversion stage (26, 27) for converting a digital data signal shaped in the unit, in order to supply the data amplitude modulation control signal (Vmod) to the power amplifier.

主权项

1. A data amplitude modulation circuit for the transmission of radio frequency signals, the circuit including:
a local oscillator for generating an oscillating signal at a determined carrier frequency, a unit for shaping data pulses to supply a data amplitude modulation control signal, and a power amplifier receiving the oscillating signal from the local oscillator and the data amplitude modulation control signal from the data pulse shaping unit, for the transmission of data amplitude modulated radio frequency signals by an antenna or an antenna arrangement, wherein the data pulse shaping unit includes a pulse shaper for digitally adapting the data transition edges on the basis of an incoming digital data signal, and a digital-analogue conversion stage for converting a digital data signal shaped in the unit, so as to supply the data amplitude modulation control signal to the power amplifier, wherein the pulse shaper includes several wave shapes stored in a memory, wherein each wave shape can be individually selected to digitally attenuate or smooth all the transition edges of the data to be transmitted in the data amplitude modulated radio frequency signals.