System and method for controlling a power amplifier using a programmable ramp circuit
AssigneeAvago Technologies ECBU IP (Singapore) Pte. Ltd.
InventorsHuaimao Sheng, Larry B. Li
Life of this patent
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Abstract
A system and method for controlling a power amplifier using a programmable ramp circuit involves receiving an input bias current at a programmable ramp circuit, generating an output bias current based on the input bias current using the programmable ramp circuit, and transmitting the output bias current from the programmable ramp circuit to a power amplifier for amplifying a radio frequency signal.
Claims20
A method for controlling a power amplifier using a programmable ramp circuit, the method comprising:
- receiving an input bias current at a programmable ramp circuit;
- generating an output bias current based on the input bias current using the programmable ramp circuit;
- and
- transmitting the output bias current from the programmable ramp circuit to a power amplifier for amplifying a radio frequency signal.
A programmable ramp circuit for controlling a power amplifier, the programmable ramp circuit comprising:
- a digital circuit configured to generate bias control bits;
- and
- an analog circuit configured to generate an output bias current using an input bias current and the bias control bits and to transmit the output bias current to a power amplifier for amplifying a radio frequency signal.
A power amplifier circuit, the power amplifier circuit comprising:
- a bandgap circuit configured to generate a first bias current;
- a programmable ramp circuit coupled to the bandgap circuit and configured to generate a second bias current and a third bias current based on the first bias current;
- a power amplifier driver circuit configured to generate a driving signal based on a radio frequency input signal under the control of the second bias current;
- and
- a power amplifier coupled to the programmable ramp circuit and the power amplifier driver circuit, wherein the power amplifier is configured to amplify the driving signal under the control of the third bias current.
Dependencies are inferred from the claim text.