Patent ID: 11942972
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A mobile device comprising:
a power management system including a positive charge pump configured to generate a positive charge pump voltage, a negative charge pump configured to generate a negative charge pump voltage, and a voltage regulator configured to generate a regulated voltage; and
a front end system including a radio frequency switch controlled by a first switch control signal, and a level shifter operable to level shift a first switch enable signal to generate the first switch control signal at a first output, the level shifter including a first level-shifting n-type transistor and a first cascode n-type transistor in series between the negative charge pump voltage and the first output, a first level-shifting p-type transistor and a first cascode p-type transistor in series between the positive charge pump voltage and the first output, and a second cascode p-type transistor between the regulated voltage and a gate of the first level-shifting n-type transistor and controlled by the first switch enable signal.