Apparatus and method for obtaining power voltage from control signals

摘要

An power voltage generating unit for a radio frequency switch includes a first input and a second input respectively configured to receive a first control signal and a second control signal, wherein the first control signal and the second control signal are configured to control which one of a plurality of paths in the radio frequency switch is enabled, and at least one output, configured to output an auxiliary voltage, derived from at least one of the first control signal or the second control signal, that is used to operate the radio frequency switch. The power voltage may be a voltage used to power an inverting circuit used to enable a selected branch as an isolation branch or shunt branch.

主权项

1. A voltage generating unit for a radio frequency switch, comprising:
a first input configured to receive a first control signal; a second input configured to receive a second control signal, wherein the first control signal and the second control signal are configured to control which one of a plurality of paths in the radio frequency switch is enabled; and a first output, wherein the first and second inputs are coupled to the first output through respective first and second voltage drop circuits, and a first power voltage and a second power voltage based on the first and second control signals are derived from the first output; wherein:
the first power voltage and the second power voltage are configured to power first and second inverting circuits of first and second switch paths of the plurality of paths respectively; andthe first and second inverting circuits receive and invert respective ones of the first and second control signals.