Amplifier for improving open-loop gain and bandwidth in a switched capacitor system

A switched capacitor system comprising:

• an amplifier capable of operating from a power supply having a first voltage level, said amplifier comprising a non-inverting input, an inverting input, a non-inverting output, and an inverting output;
• a first output capacitor coupled between said non-inverting input and said inverting output;
• a second output capacitor coupled between said inverting input and said non-inverting output;
• a first input capacitor coupled between said non-inverting input and ground;
• and
• a second input capacitor coupled between said inverting input and ground, wherein said amplifier further comprises:
• a plurality of thick-oxide field effect transistors, each of said plurality of thick-oxide field effect transistors having a relatively thick oxide layer and-fabricated using a first process such that said each thick-oxide field effect transistor is capable of withstanding a gate-to-source difference, a gate-to-drain difference, and a gate-to-bulk difference at least equal to a first maximum operating voltage, wherein said first maximum operating voltage is at least equal to said first voltage level;
• and
• a first thin-oxide field effect transistor coupled to said non-inverting input, said first thin-oxide field effect transistor having a relatively thin oxide layer and fabricated using a second process such that said first thin-oxide field effect transistor is capable of withstanding a gate-to-source difference, a gate-to-drain difference, and a gate-to-bulk difference at least equal to a second maximum operating voltage, wherein said second maximum operating voltage is less than said first voltage level.