Devices and methods related to electrostatic discharge-protected CMOS switches

摘要

Disclosed are devices and methods related to a CMOS switch for radio-frequency (RF) applications. In some embodiments, the switch can be configured to include a resistive body-floating circuit to provide improved power handling capability. The switch can further include an electrostatic discharge (ESD) protection circuit disposed relative to the switch to provide ESD protection for the switch. Such a switch can be implemented for different switching applications in wireless devices such as cell phones, including band-selection switching and transmit/receive switching.

主权项

1. A radio-frequency (RF) switching apparatus, comprising:
a switch implemented as a CMOS device, the switch including a resistive body-floating circuit configured to provide desired power handling capability of the switch; an electrostatic discharge (ESD) protection circuit disposed relative to the switch and configured to provide ESD protection for the switch; and a controller configured to control the switch, the controller and the switch being integrated, and the controller including a bandgap reference, a low dropout voltage regulator (LDO), and digital logic.