Amplifier output stage having enhanced drive capability

An integrated circuit having an amplifier, said amplifier comprising:

• a first stage having a noninverting input terminal, an inverting input terminal and an output terminal, said first stage in electrical connection with a positive source voltage and a negative source voltage;
• and
• an output stage having a control side operably connected to said output terminal of said first stage and an output side with an output terminal, said output side having a negative output driver operably connected between said output stage output terminal and said negative source voltage;
• a redirector operably connected between said control side and said output side, said redirector including a first transistor and a second transistor connected together in a current mirror arrangement;
• and
• a voltage detector operably connected to said redirector and between said control side and said output side, said voltage detector generating a control current, based on the voltage at the output of said amplifier less the voltage at the input of said amplifier output stage, that causes said redirector to provide to said negative output driver an output current that is in phase with the input current to said redirector.

An integrated circuit having an amplifier, said amplifier comprising:

• a first stage having a noninverting input terminal, an inverting input terminal and an output terminal, said first stage capable of electrical connection with a positive source voltage and a negative source voltage;
• and
• an output stage having
• a control side capable of connection to said output terminal of said first stage, said control side having a first transistor and a second transistor diode connected in series between a current source for connecting to said positive source voltage and a second stage amplifier transistor connected to said output terminal of said first stage and for connecting to said negative source voltage,
• an output side with an output terminal, said output side having a negative output driver connected between said output stage output terminal and said negative source voltage,
• a redirector that alters current flow to said negative output driver, said redirector connected to said positive source voltage and operably connected between said control side and said output side, and
• a voltage detector operably connected to said redirector and operably connected between said control side and said output side output terminal, wherein said voltage detector comprises a transistor, wherein a positive output driver comprises an output transistor, wherein said second control side transistor and said voltage detector transistor are the same transistor type, and wherein said first control side transistor and said positive output driver transistor are characteristically matched.