Patent ID: 6552613
Filing Date: 2003-04-22
Classification: H03F

Abstract:
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 at least one of a positive supply rail and a negative supply rail in a diamond configuration; a first pair of complementary transistors, bases of which are coupled to at least one emitter of said first pair of input transistors; a third pair of transistors having a current minor-type configuration, said third pair of transistors having bases coupled to at least one collector of said first pair of complementary transistors; a fourth pair of transistors having a current mirror-type configuration, said fourth pair of transistors having bases coupled to said at least one collector of said first pair of complementary transistors; a second pair of complementary transistors, bases of which are coupled to at least one of said third pair of transistors and said fourth pair of transistors, and emitters of which are coupled to 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 at least one emitter of said third pair of transistors, said second compensation device being coupled between said input terminal and at least one emitter of said fourth pair of transistors, and wherein said compensation circuit is configured for reducing parasitic disturbances introduced into said output stage amplifier circuit.