DEDICATED SHUNT SWITCH WITH IMPROVED GROUND

摘要

Antenna tuning switch circuitry includes an input port, a shunt switch, control circuitry, and an integrated ground. The shunt switch is coupled between the input port and the integrated ground. The control circuitry includes a control signal input port, a switch driver output port coupled to the shunt switch, and a ground connection port coupled to the integrated ground. The shunt switches, the RF input ports, the control circuitry, and the integrated ground are monolithically integrated on a single semiconductor die. The antenna tuning switch circuitry is adapted to selectively couple the input port to the integrated ground in order to alter one or more operating parameters of an attached antenna. By monolithically integrating the shunt switch together with the control circuitry and the integrated ground, the ON state impedance and the parasitic OFF state impedance of the antenna tuning switch circuitry can be significantly improved.

主权项

1. Antenna tuning switch circuitry comprising:
an input port; an integrated ground; a shunt switch coupled between the input port and the integrated ground; and control circuitry comprising a control signal input port, a switch driver output port coupled to the shunt switch, and a ground connection port coupled to the integrated ground, wherein the input port, the integrated ground, the shunt switch, and the control circuitry are monolithically integrated together on a single semiconductor die.