Low dissipation amplifier

摘要

A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.

主权项

1. An amplification system, comprising:
a first amplifier for receiving an input source signal; a second amplifier downstream from the first amplifier; and a plurality of impedance networks providing (i) a first coupling path from the output of said second amplifier to a load, (ii) a second coupling path from the output of said first amplifier to the load, and (iii) feedback paths from the output of said first amplifier, from the output of said second amplifier, and from the load to an input of said first amplifier; wherein all of said impedance networks consist of linear circuit elements including resistors, capacitors, or network combinations thereof.