Single supply operational amplifier and charge pump device

An operational amplifier operable to receive a positive voltage level, a neutral voltage level, and a negative voltage level, comprising:

• a bias generator operable to couple between the positive voltage level and the neutral voltage level and isolated from the negative voltage level;
• an input stage coupled to said bias generator and operable to receive two input signals, said input stage comprising a balanced signal path to isolate noise found on said input signals;
• a conversion circuit coupled to said balanced signal path for converting said input signals into a single differential signal;
• and
• an output stage coupled to said conversion circuit for processing said single differential signal into an output signal, said output stage comprising a P-N-P type transistor coupled to said output signal such that said output signal is operable to swing from substantially near the positive voltage level to substantially near the negative voltage level in response to a variation of said input signals and operable to drive highly capacitive loads.