Amplifier arrangement
AssigneeSequans Communications
InventorNitin Garg
Life of this patent
Estimating the term…
Abstract
A gain-controlled RF amplifier system has an input node and an output node. The system has a plurality of amplifier devices, selectively connectable between the input node and the output node. The amplifier devices are placed in circuit according to a measured gain derived by comparing a magnitude of a signal input to the input node against a magnitude of a signal output from the output node, and a desired value of gain.
Claims13
A method of controlling the gain of an RF amplifier device, the RF amplifier device having an input signal and an output signal, and a plurality of parallel-connected gain stages, the method comprising
- comparing a measure of magnitude of the input signal to a like measure of magnitude of the output signal;
- and
- using a result of the comparison to selectively enable said gain stages by switching respective gain stages into and out of circuit to achieve a gain equal to that of the sum of the gains of the enabled gain stages.
A gain-controlled RF amplifier system, the system having an input node and an output node and further comprising
- a plurality of parallel-connected gain stages, connected between the input node and the output node;
- circuitry for comparing a magnitude of a signal input to the input node against a magnitude of a signal output from the output node, the comparing circuitry having an output providing a comparison result;
- a control means responsive to the comparison result to select a number of said parallel-connected gain stages.
Dependencies are inferred from the claim text.