RF Switch with Bypass Topology
AssigneepSemi Corporation
InventorsEthan Prevost, Michael Conry
Life of this patent
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Abstract
An RF signal switch circuit that allows connection of any of N radio frequency (RF) input terminals to a switch output port, either in a low loss mode, in a bypass mode, or, optionally, in a signal function mode. Embodiments of the invention allow for both a single switch in the series input path to a target circuit while still having the ability to isolate the bypass path from the target circuit. In the low loss and bypass mode, the circuit simultaneously exhibits low input insertion loss (and thus a low noise factor) and high bypass mode isolation.
Claims21
A radio frequency (RF) signal switch circuit, including:
- (a) at least one first type RF signal port, each first type RF signal port having:
- (1) a first shunt switch coupled to the first type RF signal port and configured to selectively couple the first type RF signal port to circuit ground,
- (2) a first series switch coupled between the first type RF signal port and at least one corresponding second type RF signal port, and
- (3) at least one set of second series switches coupled to the first type RF signal port;
- (b) at least one first circuit path each coupled to a corresponding second shunt switch and coupled to a corresponding one set of second series switches, each first circuit path being configured to be coupled to at least one target circuit;
- (c) at least one second circuit path configured to be coupled to at least one target circuit, and being coupled to a corresponding third shunt switch;
- and
- (d) at least one third series switch coupled to a corresponding one second circuit path and to at least one corresponding second type RF signal port.
A radio frequency (RF) signal switch, including a plurality of RF input ports each coupled to a corresponding selectable ground shunt path, a corresponding selectable bypass path couplable to a switch output port, and at least one corresponding selectable signal path configured to be coupled to an input of a corresponding target circuit, and a switch path selectively couplable coupled to the switch output port and configured to be coupled to an output of the corresponding target circuit.
A radio frequency (RF) signal switch, including:
- (a) at least one RF input port coupled to a corresponding switch group having a selectable ground shunt path, a selectable bypass path couplable to a switch output port, and at least one selectable signal path;
- (b) at least one shuntable in-circuit path coupled to at least one corresponding selectable signal path, each shuntable in-circuit path being configured to be coupled to an input of a corresponding target circuit;
- and
- (c) at least one series/shunt switch each configured to be coupled to an output of a corresponding target circuit and coupled to the switch output port.
A radio frequency (RF) signal switch, including:
- (a) at least one RF input port coupled to a corresponding switch group having a selectable ground shunt path, a selectable bypass path couplable to a switch output port, and at least one selectable signal path configured to be coupled to an input of at least one corresponding target circuit;
- and
- (b) at least one series/shunt switch each configured to be coupled to an output of a corresponding target circuit and coupled to the switch output port.
Dependencies are inferred from the claim text.