Apparatus and methods for biasing of power amplifiers
AssigneeSkyworks Solutions, Inc.
InventorsPing Li, Paul T. DiCarlo
Life of this patent
Estimating the term…
Abstract
Apparatus and methods for biasing of power amplifiers are disclosed. In one embodiment, a mobile device includes a transceiver that generates a radio frequency signal and a power amplifier enable signal, a power amplifier that provides amplification to the radio frequency signal and that is biased by a bias signal, and a bias circuit that receives the power amplifier enable signal and generates the bias signal. The bias circuit includes a gain correction circuit that generates a correction current in response to activation of the power amplifier enable signal, and a primary biasing circuit that generates the bias signal based on the correction current and the power amplifier enable signal.
Claims20
A packaged module comprising:
- a package substrate;
- and
- an integrated circuit die attached to the package substrate and including a power amplifier configured to amplify a radio frequency signal and a bias circuit configured to receive a power amplifier enable signal, the bias circuit including a gain correction circuit configured to generate a correction current in response to activation of the power amplifier enable signal, and a primary biasing circuit configured to receive the correction current at a first node and to generate a bias signal that biases the power amplifier, the primary biasing circuit including a first bipolar transistor having a collector electrically connected to the first node and a second bipolar transistor having an emitter electrically connected to the first node, the gain correction circuit including a time dependent signal generator configured to generate a control current in response to activation of the power amplifier enable signal, and a current amplifier configured to generate the correction current by amplifying the control current.
A wireless device comprising:
- a transceiver configured to configured to generate a radio frequency signal;
- a power amplifier configured to amplify the radio frequency signal, the power amplifier configured to receive a bias signal that biases the power amplifier;
- and
- a bias circuit configured to receive a power amplifier enable signal, the bias circuit including a gain correction circuit configured to generate a correction current in response to activation of the power amplifier enable signal, and a primary biasing circuit configured to receive the correction current at a first node and to generate the bias signal, the primary biasing circuit including a first bipolar transistor having a collector electrically connected to the first node and a second bipolar transistor having an emitter electrically connected to the first node, the gain correction circuit including a time dependent signal generator configured to generate a control current in response to activation of the power amplifier enable signal, and a current amplifier configured to generate the correction current by amplifying the control current.
A method of power amplifier biasing, the method comprising:
- generating a radio frequency signal using a transceiver;
- amplifying the radio frequency signal using a power amplifier;
- generating a correction current in response to activation of a power amplifier enable signal using a gain correction circuit, including generating a control current in response to activation of the power amplifier enable signal using a time dependent signal generator, and generating the correction current by amplifying the control current using a current amplifier;
- providing the correction current to an input node of a primary biasing circuit, the primary biasing circuit including a first bipolar transistor having a collector electrically connected to the input node and a second bipolar transistor having an emitter electrically connected to the input node;
- and
- biasing the power amplifier using a bias signal outputted from the primary biasing circuit.
Dependencies are inferred from the claim text.