Patent ID: 6018271
Filing Date: 2000-01-25
Classification: H03F

Abstract:
An amplifier circuit comprising:a signal conversion circuit for converting an input signal into a current signal;a current calculation circuit for calculating a difference current between a predetermined current value and said current signal;a first current amplifier circuit having an element of a first polarity for amplifying said difference current; anda second current amplifier circuit having an element of a second polarity for amplifying said difference current;wherein said first current amplifier circuit and said second current amplifier circuit are connected to each other in complementary configuration, andwherein an output of said amplifier circuit is directly obtained from a connection node of outputs of said first and second current amplifier circuits, andwherein voltage phases of an input and an output of said first current amplifier circuit are opposite to each other, and voltage phases of an input and an output of said second current amplifier circuit are opposite to each other.