Output stage amplifier with compensation circuitry

An output stage amplifier circuit for providing a high output voltage and current signal, said output stage amplifier circuit comprising:

• an input terminal and an output terminal;
• a first pair of input transistors comprising a first transistor and a second transistor, bases of which are coupled to said input terminal, said first transistor having a collector coupled to a negative supply rail, said second transistor having a collector coupled to a positive supply rail;
• a first pair of complementary transistors comprising a third transistor and a fourth transistor, emitters of which are coupled to said output terminal through a feedback resistor, said third transistor having a base coupled to an emitter of said first transistor, said fourth transistor having a base coupled to an emitter of said second transistor;
• a third pair of transistors comprising a fifth transistor and a sixth transistor, bases of which are coupled to a collector of said fifth transistor to provide a current mirror-type configuration, said bases of said fifth transistor and said sixth transistor being further coupled to a collector of said third transistor;
• a fourth pair of transistors comprising a seventh transistor and an eighth transistor, bases of which are coupled to a collector of said seventh transistor to provide a current mirror-type configuration, said bases of said seventh transistor and said eighth transistor being further coupled to a collector of said fourth transistor;
• a pair of output transistors comprising a ninth transistor and a tenth transistor, emitters of which are coupled to said output terminal, said ninth transistor having a base coupled to a collector of said sixth transistor, said tenth transistor having a base coupled to a collector of said eighth transistor;
• and
• a compensation circuit comprising a first compensation device and a second compensation device, said first compensation device being coupled between said input terminal and an emitter of said sixth transistor, said second compensation device being coupled between said input terminal and an emitter of said eighth transistor, and
• wherein said compensation circuit is configured for reducing parasitic disturbances introduced by at least one of said positive supply rail and said negative supply rail into said output stage amplifier circuit.

An output stage amplifier circuit for providing a high output voltage signal and a high output current signal, said output stage amplifier circuit comprising:

• an input terminal and an output terminal;
• a first pair of input transistors, bases of which are coupled to said input terminal, and collectors of which are coupled to a positive supply rail and a negative supply rail in a diamond configuration;
• a first pair of complementary transistors, said first pair of complementary transistors being coupled to said first pair of input transistors;
• a third pair of transistors having a current mirror-type configuration, said third pair of transistors coupled to said first pair of complementary transistors;
• a fourth pair of transistors having a current mirror-type configuration, said fourth pair of transistors coupled to said first pair of complementary transistors;
• a pair of output transistors, said pair of output transistors having at least one transistor coupled between at least one of said third pair of transistors and said output terminal, and at least one transistor coupled between at least one of said fourth pair of transistors and said output terminal;
• and
• a compensation circuit comprising a first compensation device and a second compensation device, said first compensation device being coupled between said input terminal and said third pair of transistors, said second compensation device being coupled between said input terminal and said fourth pair of transistors, and
• wherein said compensation circuit is configured to reduce parasitic disturbances introduced into said output stage amplifier circuit.