Patent ID: 6037839
Filing Date: 2000-03-14
Classification: H03F

Abstract:
A BTL amplifying circuit having a first output amplifier and a second output amplifier for amplifying input signals having mutually inverted phases and for BTL-driving a load, comprising:first and second output transistors which are SEPP connected and provided in the first output amplifier;first and second driving transistors provided in the first output amplifier for driving the first and second output transistors, respectively;third and fourth output transistors which are SEPP connected and provided in the second output amplifier;third and fourth driving transistors provided in the second output amplifier for driving the first and second output transistors, respectively;a first resistor connecting a connection midpoint between the first and second output transistors contained in the first output amplifier and a connection midpoint between the third and fourth driving transistors contained in the second output amplifier; anda second resistor connecting a connection midpoint between the third and fourth output transistors contained in the second output amplifier and a connection midpoint between the first and second driving transistors contained in the first output amplifier.