Patent ID: 6323733
Filing Date: 2001-11-27
Classification: H03F,H04L

Abstract:
A power amplifier for receiving an input analog, signal and generating a corresponding output analog signal, the power amplifier comprising:a) first and second power supply rails capable of supplying power having respective first and second predetermined levels, and a single predetermined polarity;b) an amplifier circuit connected to receive the input analog signal and adapted to generate the output analog signal, the amplifier circuit comprising:i) a push-pull circuit connected to receive the input analog signal; andii) an output transformer comprising a primary winding connected to the push-pull circuit, and selectively connectable to one of die first and second power supply rails via the switch circuit, and a secondary winding connected to the signal line for generating, the output analog signal; andc) a switch circuit adapted to selectively connect one of the first and second power supply rails to the amplifier circuit.