Efficient generation of radio frequency currents

Radio frequency power amplifier, comprising:

• input signal terminal;
• input detector arranged to determine an instantaneous size measure of a signal on said input signal terminal, said size measure being an amplitude or therefrom derivable quantity;
• drive signal deriving means connected to said input signal terminal, providing a drive signal;
• bias signal generator providing a bias signal, said bias signal generator being connected to said input detector and being controlled dependent on said instantaneous size measure;
• and
• amplifying element, connected to said drive signal deriving means and said bias signal generator;
• whereby said bias signal generator being controlled to gives rise to an increased nonlinearity in said amplifying element.

Transmitter, having a radio frequency power amplifier, said radio frequency power amplifier comprising:

• input signal terminal;
• input detector arranged to determine an instantaneous size measure of a signal on said input signal terminal, said size measure being an amplitude or therefrom derivable quantity;
• drive signal deriving means connected to said input signal terminal, providing a drive signal;
• bias signal generator providing a bias signal, said bias signal generator being connected to said input detector and being controlled dependent on said instantaneous size measure;
• and
• amplifying element, connected to said drive signal deriving means and said bias signal generator;
• whereby said bias signal generator being controlled to gives rise to an increased nonlinearity in said amplifying elements.

Wireless communication system, having a radio frequency power amplifier, said radio frequency power amplifier comprising:

• input signal terminal;
• input detector arranged to determine an instantaneous size measure of a signal on said input signal terminal, said size measure being an amplitude or therefrom derivable quantity;
• drive signal deriving means connected to said input signal terminal, providing a drive signal;
• bias signal generator providing a bias signal, said bias signal generator being connected to said input detector and being controlled dependent on said instantaneous size measure;
• and
• amplifying element, connected to said drive signal deriving means and said bias signal generator;
• whereby said bias signal generator being controlled to gives rise to an increased nonlinearity in said amplifying element.

Base station of a wireless communication system, having a radio frequency power amplifier, said radio frequency power amplifier comprising:

• input signal terminal;
• input detector arranged to determine an instantaneous size measure of a signal on said input signal terminal, said size measure being an amplitude or therefrom derivable quantity;
• drive signal deriving means connected to said input signal terminal, providing a drive signal;
• bias signal generator providing a bias signal, said bias signal generator being connected to said input detector and being controlled dependent on said instantaneous size measure;
• and
• amplifying element, connected to said drive signal deriving means and said bias signal generator;
• whereby said bias signal generator being controlled to gives rise to an increased nonlinearity in said amplifying element.

Mobile unit of a wireless communication system, having a radio frequency power amplifier, said radio frequency power amplifier comprising:

• input signal terminal;
• input detector arranged to determine an instantaneous size measure of a signal on said input signal terminal, said size measure being an amplitude or therefrom derivable quantity;
• drive signal deriving means connected to said input signal terminal, providing a drive signal;
• bias signal generator providing a bias signal, said bias signal generator being connected to said input detector and being controlled dependent on said instantaneous size measure;
• and
• amplifying element, connected to said drive signal deriving means and said bias signal generator;
• whereby said bias signal generator being controlled to gives rise to an increased nonlinearity in said amplifying element.