Track and hold circuit

A track and hold circuit, comprising:

• a Complementary Metal Oxide Semiconductor (CMOS) flipped voltage follower (FVF) having a pair of differential inputs and a pair of differential outputs;
• a pair of first switches, each of the first switches being coupled between a corresponding one of a pair of differential signal inputs and a corresponding one of the pair of differential inputs of the CMOS FVF;
• and
• a second switch coupled between the pair of differential outputs of the CMOS FVF;
• wherein the CMOS FVF comprises a pair of first transistors with gates being the differential inputs of the CMOS FVF and sources being the differential outputs of the CMOS FVF, a pair of second transistors, a first current mirror transistor, a second current mirror transistor and a third switch;
• wherein the first current mirror transistor is coupled between a first supply and sources of the second transistors;
• drains of the second transistors are respectively coupled to sources of the first transistors, drains of the first transistors are respectively coupled to first ends of first resistors, and second ends of the first resistors are connected to a second supply;
• wherein the second current mirror transistor is coupled between the first supply and a first end of the third switch, and a second end of the third switch is coupled to the sources of the second transistors;
• wherein gates of the first current mirror transistor and the second current mirror transistor are coupled to a bias voltage;
• wherein the CMOS FVF is configured to receive a pair of differential input signals from the pair of differential signal inputs through the pair of differential inputs of the CMOS FVF, and output a pair of differential output signals through the pair of differential outputs of the CMOS FVF;
• wherein a state of the second switch is controlled by a clock signal to be the same as a state of each of the first switches, and a state of the third switch is controlled to be complementary to the state of the second switch.