A device for generating a qubit control signal, wherein the device is operable at cryogenic temperatures, the device comprising: a first signal envelope generator circuit (202, 402) comprising a first plurality of signal sources, wherein an output of each signal source of the first plurality of signal sources is combined to provide a first cumulative output; a first mixer circuit (210, 414) coupled to the first signal envelope generator circuit for up-conversion of the first cumulative output, wherein the first cumulative output is coupled to a first input of the first mixer circuit, an output of the first mixer circuit comprises a first qubit control signal, and the first mixer circuit is configured to mix the first cumulative output with a first local oscillator signal received at a second input of the first mixer circuit; a second signal envelope generator circuit comprising a second plurality of signal sources, wherein an output of each signal source of the second plurality of signal sources is combined to provide a second cumulative output; and a second mixer circuit coupled to the second signal envelope generator for up-conversion of the second cumulative output, wherein the second cumulative output is coupled to a first input of the second mixer circuit, an output of the second mixer circuit comprises a second qubit control signal, and the second mixer circuit is configured to mix the second cumulative output with a second local oscillator signal received at a second input of the second mixer circuit, and the first qubit control signal is combined with the second qubit control signal to provide a qubit XY control signal, wherein the first local oscillator signal is out of phase with the second local oscillator signal. a first signal envelope generator circuit (202, 402) comprising a first plurality of signal sources, wherein an output of each signal source of the first plurality of signal sources is combined to provide a first cumulative output; a first mixer circuit (210, 414) coupled to the first signal envelope generator circuit for up-conversion of the first cumulative output, wherein the first cumulative output is coupled to a first input of the first mixer circuit, an output of the first mixer circuit comprises a first qubit control signal, and the first mixer circuit is configured to mix the first cumulative output with a first local oscillator signal received at a second input of the first mixer circuit; a second signal envelope generator circuit comprising a second plurality of signal sources, wherein an output of each signal source of the second plurality of signal sources is combined to provide a second cumulative output; and a second mixer circuit coupled to the second signal envelope generator for up-conversion of the second cumulative output, wherein the second cumulative output is coupled to a first input of the second mixer circuit, an output of the second mixer circuit comprises a second qubit control signal, and the second mixer circuit is configured to mix the second cumulative output with a second local oscillator signal received at a second input of the second mixer circuit, and the first qubit control signal is combined with the second qubit control signal to provide a qubit XY control signal, wherein the first local oscillator signal is out of phase with the second local oscillator signal.