Patent ID: 9197205
Filing Date: 2015-11-24
Classification: H03K,H03L,H04B

Abstract:
1. A wireless communication device including: a Radio Frequency (RF) switch circuit including a common terminal configured to couple with an antenna and a plurality of ports, including: a plurality of switch circuits coupled between the antenna and the plurality of ports, and an interface (I/F) circuit coupled between a first power supply and a second power supply, and configured to control the plurality of switch circuits, a power-on reset circuit configured to provide a power-on reset signal to control the I/F circuit; a transmitter circuit coupled with one of the plurality of ports; a receiver circuit coupled with another one of the plurality of ports; wherein the power-on reset circuit comprises: a first diode and a second diode coupled in parallel in a forward direction between the first power supply and the second power supply; a first resistor circuit and a first capacitor element coupled in parallel between the first diode and the first power supply; a second resistor circuit and a second capacitor element coupled in parallel between the second diode and the first power supply; and a comparator circuit configured to output a comparison result between a first voltage of a first node of the first resistor circuit and a second voltage of a second node of the second resistor circuit as the power-on reset signal.