Cross-coupled multipath feedforward operational amplifiers

An operational amplifier arranged in a feedback configuration, the operational amplifier comprising:

• a first and a second amplifier, connected in series in that order, defining a first amplification path that extends between an input terminal and an output terminal of the operational amplifier;
• and
• a third, a fourth, and the second amplifier, connected in series in that order, defining a second amplification path that extends between the input and output terminals of the operational amplifier,
• wherein the first amplifier includes an amplification transistor with an intrinsic gate-to-drain capacitance connected between a first input and a first output of the first amplifier, and a cross-coupling capacitor connected between the first input and a second output of the first amplifier.

An operational amplifier arranged in a feedback configuration, the operational amplifier comprising:

• a first and a second amplifier, connected in series in that order, defining a first amplification path that extends between an input terminal and an output terminal of the operational amplifier;
• and
• the first, a third, and a fourth amplifier, connected in series in that order, defining a second amplification path that extends between the input and output terminals of the operational amplifier,
• wherein the second amplifier includes an amplification transistor with an intrinsic gate-to-drain capacitance connected between a first input and a first output of the first amplifier, and a cross-coupling capacitor connected between the first input and a second output of the first amplifier.