Direct conversion of low power high linearity receiver

A radio frequency circuit, comprising:

• a circuit means adapted to receive a radio frequency input signal, the circuit having an adjustable bias level;
• a bias control and feedback means having more than one level of control for generating a bias control signal based upon a base-band signal for controlling the circuit means and outputting an output signal;
• and
• a bypass switch across the circuit means adapted to receive the radio frequency input signal and to output a DC component signal corresponding to a bias power received by the circuit means;
• wherein the bypass switch enabling being a direct conversion between the radio frequency signal and the output signal.

A method for amplifying a radio frequency signal comprising:

• amplifying using an adjustable bias level and a feedback power signal, a radio frequency input signal into an output signal;
• detecting a base-band signal for generating a bias control signal for controlling the adjustable bias level;
• and
• using a bypass switch for connecting the input radio frequency signal to an output signal enabling the output signal to correspond to the strength of said feedback power signal without incurring any residual signal transients;
• wherein the bypass switch enabling being a direct conversion between the radio frequency signal and the output signal.

A receiver for receiving a radio frequency signal, comprising:

• a first amplifier having a first bias level configured to receive a radio frequency input signal and feedback power detection and amplify the same into a first internal signal;
• a first bias generator configured to receive a bias control signal and generate according thereto the first bias level;
• a detector configured to receive a signal indicating a signal strength of the input signal and produce according thereto the bias control signal, the bias control signal dependent on a RSSI dependent on baseband circuitry which includes said feedback power detection;
• and
• an alternative means for receiving the radio frequency signal bypassing said first bias generator and outputting a first internal signal;
• wherein the alternative means providing a direct conversion of the radio frequency signal to a first internal signal.