Track and hold circuits for high speed and interleaved ADCs

A track-and-hold circuit comprising:

• a balun that is to receive a single-ended input signal and output a differential output signal at a first output and a second output of the balun based on the single-ended input signal;
• a first sampling network with dither injection coupled with the first output of the balun;
• a second sampling network with dither injection coupled with the second output of the balun;
• a first matching circuit that is to match an impedance of the balun with an impedance of the first sampling network;
• and
• a second matching circuit that is to match an impedance of the balun with an impedance of the second sampling network.

A method, comprising:

• converting a single-ended input signal to a differential output signal at a first and second outputs;
• sampling, by a first sampling network, the first output;
• sampling, by a second sampling network, the second output;
• randomly changing a polarity of a differential signal sampled by the first sampling network and the second sampling network;
• and
• amplifying, by a discrete-time amplifier, the differential signal.