Power amplifier with variable power supply voltage

A structure comprising:

• a power amplifier;
• and
• a temperature-dependent power supply system including:
• a first voltage generator including:
• a reference voltage output node;
• a primary proportional-to-absolute-temperature (PTAT) current source providing a primary PTAT current and a primary constant-to-absolute-temperature (CTAT) current source providing a primary CTAT current, wherein the primary PTAT current source and the primary CTAT current source are connected in parallel between a first voltage rail and the reference voltage output node;
• and
• a resistor connected between the reference voltage output node and a second voltage rail, wherein the first voltage generator generates, at the reference voltage output node, a reference voltage dependent on an operating temperature;
• and
• a second voltage generator connected to receive the reference voltage, wherein the second voltage generator generates a power supply voltage dependent on the reference voltage, and wherein the power amplifier connected to receive the power supply voltage.

A structure comprising:

• a power amplifier;
• and
• a temperature-dependent power supply system including:
• a first voltage generator including:
• a temperature sensor;
• a variable voltage source;
• a look-up table populated with a list of different operating temperatures and different reference voltages associated with the different operating temperatures, respectively;
• and
• control logic connected the temperature sensor, the look-up table, and the variable voltage source, wherein the control logic causes the variable voltage source to output a reference voltage listed in the look-up table and associated with an operating temperature sensed the temperature sensor;
• and
• a second voltage generator connected to receive the reference voltage, wherein the second voltage generator generates a power supply voltage dependent on the reference voltage, and wherein the power amplifier connected to receive the power supply voltage.