Synthesizer—power amplifier interface in a wireless circuit

An integrated circuit comprising:

• a driving circuit to output a single-ended clock signal;
• a first conduit to communicate the single-ended clock signal;
• a duty cycle correction circuit coupled to the first conduit to receive the single-ended clock signal and compensate for a duty cycle variation in the single-ended clock signal caused by harmonic energy;
• a conversion circuit to convert the compensated single-ended clock signal to a differential signal;
• an interface circuit to transfer the differential signal from a first ground domain to a second ground domain and convert the differential signal to a second single-ended signal;
• and
• a second conduit to communicate the second single-ended signal to a receiving circuit.

A method comprising:

• receiving, in a duty cycle correction circuit of a transmitter, a first single-ended radio frequency (RF) signal;
• compensating, in the duty cycle correction circuit, for a duty cycle variation in the first single-ended RF signal;
• outputting a duty cycle-corrected RF signal from the duty cycle correction circuit to a conversion circuit, and converting the duty cycle-corrected RF signal to a differential RF signal;
• transferring the differential RF signal from a first ground domain of the transmitter to a second ground domain of the transmitter;
• and
• converting the differential RF signal to a second single-ended RF signal, and sending the second single-ended RF signal to a differential power amplifier.