Attenuation circuits with low insertion loss, and modules and devices using same
AssigneeSkyworks Solutions, Inc.
InventorNuttapong Srirattana
Life of this patent
Estimating the term…
Abstract
An attenuation circuit with a low insertion loss is provided. The attenuation circuit includes an input to receive an input signal, an output to provide an attenuated signal, an attenuator coupled between the input and the output, the attenuator being configured to attenuate the input signal, an isolation switch constructed to isolate the attenuator from the input or the output when in a bypass mode, and a bypass switch coupled in parallel with the attenuator to couple the input to the output when in the bypass mode.
Claims20
An attenuation circuit comprising:
- an input to receive an input signal;
- an output to provide an attenuated signal;
- an attenuator selectively coupled between the input and the output, the attenuator being configured to attenuate the input signal;
- a first isolation switch constructed and arranged to selectively isolate the attenuator from at least one of the input and the output when in a bypass mode;
- and
- a bypass switch coupled in parallel with the attenuator and the first isolation switch and constructed and arranged to selectively couple the input to the output when in the bypass mode.
An electromagnetic coupler module comprising:
- an input, an output, and a coupled port;
- an electromagnetic coupler connected between the input and the output, the electromagnetic coupler being configured to electromagnetically couple a portion of a signal traveling between the input and the output and to provide the coupled portion at the coupled port;
- an attenuator selectively connected to the coupled port, the attenuator being configured to selectively attenuate the coupled portion;
- a first isolation switch connected in series with the attenuator, the first isolation switch constructed to selectively isolate the attenuator from the coupled port when in a bypass mode;
- and
- a bypass switch connected in parallel with the attenuator and the first isolation switch and configured to convey the coupled portion between the coupled port and a node when in the bypass mode.
A wireless device comprising:
- a transceiver configured to produce a transmit signal and to receive a receive signal;
- and
- an attenuation circuit configured to selectively attenuate an input signal, the input signal being at least one of the transmit signal, the receive signal, and a derived signal derived from at least one of the transmit signal and the receive signal, the attenuation circuit including an input to receive the input signal, an output to provide an attenuated signal, an attenuator selectively coupled between the input and the output, a first isolation switch constructed and arranged to selectively isolate the attenuator from at least one of the input and the output when in a bypass mode, and a bypass switch coupled in parallel with the attenuator and the first isolation switch and constructed and arranged to selectively couple the input to the output in the bypass mode.
Dependencies are inferred from the claim text.