Dual-mode power amplifier for wireless communication

An apparatus comprising:

• a digital core;
• a sensor circuit coupled to the digital core;
• and
• a transceiver coupled to the digital core, the transceiver comprising a dual-mode power amplifier, the dual-mode power amplifier comprising:
• a transistor stack comprising a first plurality of metal oxide semiconductor field effect transistors (MOSFETs) of a first polarity and a second plurality of MOSFETs of a second polarity;
• first input MOSFETs to receive a variable envelope signal of a first modulation scheme and provide the variable envelope signal to a second terminal of a first MOSFET of the first plurality of MOSFETs and a second terminal of a first MOSFET of the second plurality of MOSFETs;
• and
• second input MOSFETs to receive a constant envelope signal of a second modulation scheme and provide the constant envelope signal to the second terminal of the first MOSFET of the first plurality of MOSFETs and the second terminal of the first MOSFET of the second plurality of MOSFETs.

A dual-mode power amplifier comprising:

• a first plurality of metal oxide semiconductor field effect transistors (MOSFETs) of a first polarity and a second plurality of MOSFETs of a second polarity;
• first input MOSFETs to receive a variable envelope signal of an orthogonal frequency division multiplexing (OFDM) modulation scheme and provide the variable envelope signal to a second terminal of a first MOSFET of the first plurality of MOSFETs and a second terminal of a first MOSFET of the second plurality of MOSFETs;
• second input MOSFETs to receive a constant envelope signal of a frequency shift keying (FSK) modulation scheme and provide the constant envelope signal to the second terminal of the first MOSFET of the first plurality of MOSFETs and the second terminal of the first MOSFET of the second plurality of MOSFETs;
• a second MOSFET of the first plurality of MOSFETs coupled to the first MOSFET of the first plurality of MOSFETs, wherein a first terminal of the second MOSFET of the first plurality of MOSFETs is to output an amplified variable envelope signal and an amplified constant envelope signal;
• a second MOSFET of the second plurality of MOSFETs coupled to the first MOSFET of the second plurality of MOSFETs, wherein a first terminal of the second MOSFET of the second plurality of MOSFETs is to output the amplified variable envelope signal and the amplified constant envelope signal;
• and
• a controller to control the dual-mode power amplifier to operate in a linear mode to output the amplified variable envelope signal and to operate in a switching mode to output the amplified constant envelope signal.