Low distortion driver for analog-to-digital converter (ADC)

A driver comprising:

• a driver input;
• a driver output;
• a voltage follower comprising:
• a first transistor including a drain, a source coupled to the driver output, and a gate coupled to the driver input;
• a second transistor including a drain adapted to be coupled to a first potential, a source coupled to the drain of the first transistor, and a gate;
• a third transistor including a drain coupled to the source of the first transistor, a source, and a gate adapted to be coupled to a first bias voltage source;
• and
• a fourth transistor including a drain coupled to the source of the third transistor, a source adapted to be coupled to a common potential, and a gate coupled to the drain of the second transistor;
• and
• a gain-boost amplifier including a first input coupled to the drain of the first transistor, second input coupled to the source of the first transistor, and an output coupled to the gate of the second transistor.

A driver comprising:

• an inverting amplifier stage comprising:
• an inverting amplifier input;
• an inverting amplifier output;
• a first voltage follower including a first input coupled to the inverting amplifier input and a first output coupled to the inverting amplifier output;
• and
• a first gain-boost amplifier coupled to the first voltage follower;
• a non-inverting amplifier stage comprising:
• a non-inverting amplifier input;
• a non-inverting amplifier output;
• a second voltage follower including a second input coupled to the non-inverting amplifier input and a second output coupled to the non-inverting amplifier output;
• and
• a second gain-boost amplifier coupled to the second voltage follower;
• and
• a first compensation circuit comprising a first capacitor and a first resistor coupled in series, and coupled between the non-inverting amplifier output and the first voltage follower.

An electronic circuit comprising:

• A driver comprising:
• an inverting amplifier stage comprising:
• an inverting amplifier input;
• an inverting amplifier output;
• a first voltage follower including a first input coupled to the inverting amplifier input and a first output coupled to the inverting amplifier output;
• and
• a first gain-boost amplifier coupled to the first voltage follower;
• a non-inverting amplifier stage comprising:
• a non-inverting amplifier input;
• a non-inverting amplifier output;
• a second voltage follower including a second input coupled to the non-inverting amplifier input and a second output coupled to the non-inverting amplifier output;
• and
• a second gain-boost amplifier coupled to the second voltage follower;
• and
• an analog to digital converter (ADC) having first and second inputs respectively coupled to the inverting amplifier output and the non-inverting amplifier output.