Cancellation technique for second harmonic distortion and spectral image in DACS and digital transmitters

A device, comprising:

• a transformer that comprises a first coil and a second coil;
• a signal sampler module configured to receive a first signal, wherein the signal sampler module is configured to provide two or more sampled pulses of the first signal;
• a delay module coupled between the signal sampler module and the first coil, wherein the delay module is configured to apply a delay to the two or more sampled pulses, thereby generate a delayed two or more sampled pulses;
• and
• a port coupled to the second coil, wherein a second signal at the second coil is proportional to the delayed two or more sampled pulses subtracted from the two or more sampled pulses.

A transmission system, comprising:

• a filter;
• and
• a device comprising:
• a transformer that comprises a first coil and a second coil;
• and
• a signal sampler module configured to sample, at a first frequency, a signal received by the signal sampler module, wherein:
• the signal sampler module is coupled to a first node and is configured to provide a plurality of sampled pulses of the signal at the first node,
• the first node is coupled to a second node of the first coil, and
• the first node is coupled via a first flip flop having a first clock signal with the first frequency to a third node of the first coil, wherein the first flip flop is configured to provide a delay of half a period of the first frequency for the plurality of sampled pulses.