System and Method for a Radio Frequency Switch

摘要

A circuit includes multiple switching networks coupled between corresponding multiple RF ports and a common RF port. Each of the multiple switching networks includes a first switch between its corresponding RF port and the common RF port. At least one of the multiple switching networks includes a selectable network between the first switch and the common RF port. The selectable network provides a DC path in a first state and a series capacitance in a second state. A control circuit is configured to establish an RF path by activating a first switch and by deactivating other first switches. The control circuit is also configured to establish an RF path by placing a selectable network in the first state when the control circuit operates in a first mode and by placing a selectable network in the second state when the control circuit operates in a second mode.

主权项

1. A circuit comprising:
a plurality of switching networks coupled between a corresponding plurality of RF ports and a common RF port, wherein:
each of the plurality of switching networks comprises a first switch coupled between its corresponding RF port and the common RF port, andat least one of the plurality of switching networks comprises a selectable network coupled between the first switch and the common RF port, wherein the selectable network provides a DC path in a first state and a series capacitance in a second state; and a control circuit configured to establish an RF path by:
activating the first switch of one of the plurality of switching networks, and deactivating the first switches of the remaining plurality of switching networks,placing the selectable network in one of the remaining plurality of switching networks in the first state when the control circuit operates in a first mode, andplacing the selectable network in one of the remaining plurality of switching networks in the second state when the control circuit operates in a second mode.