Back to results
US 7,705,681 B2Granted
Apparatus for coupling at least one of a plurality of amplified input signals to an output terminal using a directional coupler
AssigneeInfineon Technologies AG
InventorNikolay Ilkov
Life of this patent
Estimating the term…
Abstract
An apparatus has an input terminal configured to receive an input signal, a network coupled to the input terminal and configured to provide a plurality of amplified input signals, and a directional coupler coupled to the network and configured to couple at least one of the plurality of amplified input signals to an output terminal.
Claims21
An apparatus, comprising:
- an input terminal configured to receive an input signal;
- a network coupled to the input terminal and configured to provide a plurality of amplified input signals;
- and
- a directional coupler coupled to the network and comprising a through port, a coupled port and an isolated port coupled to the network and an output port coupled to an output terminal;
- wherein the network comprises:
- a first amplifier coupled between the input terminal and the through port of the directional coupler, the first amplifier comprising a first gain and an output for a first amplified input signal;
- a second amplifier coupled between the input terminal and the coupled port of the directional coupler, the second amplifier comprising a second gain and an output for a second amplified input signal;
- and
- a third amplifier coupled between the input terminal and the isolated port of the directional coupler, the third amplifier comprising a third gain and an output for a third amplified input signal.
6 more elements
A multiple gain step low noise amplifier, comprising:
- a low noise amplifier comprising an RF input for an input current and an output for an amplified input current;
- a directional coupler comprising a through port, a coupled port, an isolated port and an output port;
- a first amplifier comprising a first gain, an enable input, an input coupled to the low noise amplifier output and an output coupled to the through port of the directional coupler;
- a second amplifier comprising a second gain, an enable input, an input coupled to the low noise amplifier output and an output coupled to the coupled port of the directional coupler;
- a third amplifier comprising a third gain, an enable input, an input coupled to the low noise amplifier output and an output coupled to the isolated port of the directional coupler;
- and
- a switching element coupled to the enable inputs of the first, second and third amplifiers, the switching element being configured to selectively supply an enable signal to one of the first, second and third amplifiers.
4 more elements
An apparatus, comprising:
- means for receiving an input signal;
- means for providing a plurality of amplified input signals, the means for providing comprising first means for amplifying the input signal using a first gain to generate a first amplified input signal, second means for amplifying the input signal using a second gain to generate a second amplified input signal;
- and third means for amplifying the input signal using a third gain to generate a third amplified input signal;
- and
- means for directionally coupling one of the plurality of amplified input signals to an output, the means for directionally coupling comprising a through port, a coupled port and an isolated port for receiving a respective one of the amplified input signals, and an output port.
2 more elements
Dependencies are inferred from the claim text.