Patent ID: 11894809
Assignee: PSEMI CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for operating an amplifier according to at least a low gain-state and a high gain-state, the method comprising:
providing biasing voltages to the amplifier;
based on the providing, driving a drain-to-source voltage of an output transistor of the amplifier during operation in the high gain-state higher than a drain-to-source voltage of the output transistor during operation in the low gain-state; and
based on the providing, driving a drain-to-source voltage of an input transistor of the amplifier during operation in the low gain-state higher than a drain-to-source voltage of the input transistor during operation in the high gain-state,
wherein the amplifier is a low noise amplifier (LNA) comprising a stack of a plurality of series connected transistors comprising the input transistor and one or more stack transistors comprising the output transistor, the stack coupled between a substantially fixed supply voltage and a reference ground, and
wherein the biasing voltages are provided to gates of the plurality of series connected transistors, and
based on the providing of the biasing voltages during the operation in the high gain-state, driving the input transistor further into a corresponding saturation region of operation to increase a degeneration impedance seen by the output transistor for a reduction of a non-linearity of an RF signal amplified by the LNA during the operation in the high-gain-state.