Semiconductor device and wireless communication device

摘要

To realize an optimal power-on reset in a system in which the rise of the power supply voltage is sharp.;A semiconductor device according to the present invention includes two diodes connected in parallel between power supplies, and a resistor circuit and a capacitance element connected in parallel between one power supply and each of the two diodes, and outputs a comparison result between voltages outputted from the two resistor circuits as a reset signal.

主权项

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.