Device for Generating a Vector-Modulated Output Signal and Method for Generating a Vector-Modulated Output Signal

A device for generating a vector-modulated differential output signal based on a baseband signal having a differential in-phase component and a differential quadrature component, a first differential LO signal for the in-phase component and a second differential LO signal for the quadrature component, wherein the first differential LO signal is phase-shifted with respect to the second differential LO signal, comprising:

• a clock combination circuit configured to logically combine the first differential LO signal and the second differential LO signal in order to obtain a plurality of clock signals which each have a duty ratio of 25% within a tolerance range of ±10% of a period of one of the clock signals and are shifted with respect to one another in such a way that, apart from changeover instants, at every instant a maximum of one of the combined clock signals is active;
• a baseband combination circuit configured to add together subcomponents of the in-phase component and subcomponents of the quadrature component and logically combine single-bit signals resulting from the additions with one another to obtain a plurality of combined IQ signals each having a plurality of single-bit signals;
• and
• a plurality of mixer cells configured to provide, based on the clock signals and the single-bit signals of the combined IQ signals, a plurality of first currents and provide a plurality of second currents in such a way that a first subcomponent of the differential vector-modulated output signal is based on a superposition of the first currents of the mixer cells and a second subcomponent of the differential vector-modulated output signal is based on a superposition of the second currents of the mixer cells;
• and
• wherein the baseband combination circuit is configured to carry out the logical combinations of the single-bit signals resulting from the additions such that, apart from changeover instants, at every instant each mixer cell, based on the clock signals and the single-bit signals of the combined IQ signals, provides maximally either a first current or a second current.

A mobile radio device comprising:

• a device configured to generate a vector-modulated output signal based on a baseband signal having an in-phase component and a quadrature component, a first LO signal for the in-phase component of the baseband signal and a second LO signal for the quadrature component of the baseband signal, comprising:
• a baseband combination circuit configured to combine the in-phase component and the quadrature component to obtain a plurality of combined IQ signals;
• and
• a plurality of mixer cells configured to generate the vector-modulated output signal based the combined IQ signals, the first LO signal and the second LO signal;
• a baseband processor coupled to the device and configured to generate the vector-modulated output signal to provide the baseband signal for the device for generating the vector-modulated output signal;
• and
• an antenna port configured to couple to an antenna, the antenna port coupled to the device for generating the vector-modulated output signal and configured to transmit the vector-modulated output signal to the antenna.