HIGH EFFICIENCY VOLTAGE MODE CLASS D TOPOLOGY

摘要

A high efficiency voltage mode class D amplifier and energy transfer system is provided. The amplifier and system includes a pair of transistors connected in series between a voltage source and a ground connection. Further, a ramp current tank circuit is coupled in parallel with one of the pair of transistors and a resonant tuned load circuit is coupled to the ramp current tank circuit. The ramp current tank circuit can include an inductor that absorbs an output capacitance COSS of the pair of transistors and a capacitor the provides DC blocking.

主权项

1. A power amplifier comprising:
a pair of transistors connected in series between a voltage source and a ground connection; a switch node disposed between a source of a first transistor of the pair of transistors and a drain of a second transistor of the pair of transistors; a circuit connected between the switch node and the ground connection or supply connection or both, the circuit having an inductor with an inductance that absorbs an output capacitance of the pair of transistors; and a resonant tuning circuit connected in series between the switch node and a load coupled to the power amplifier.