Patent ID: 6208846
Filing Date: 2001-03-27
Classification: H03F,H04B,H04W

Abstract:
A power control circuit for a mobile telephone having a radio-frequency source, an antenna, and a receiver circuit, the power control circuit comprising:a) a driver amplifier connected to the source;b) a power amplifier;c) a first three-way switch connected between said driver amplifier and said power amplifier;d) a second three-way switch connected between said power amplifier, said first switch, and the antenna; ande) control means connected to the receiver circuit for controlling the operation of said first and second switches and said power amplifier, said control means having at least two modes, a first mode wherein said control means deactivates said power amplifier and bypasses said power amplifier by connecting the driver amplifier to the antenna via said first and second switches and a second mode wherein said control means activates said power amplifier, connects the driver amplifier to the power amplifier via said first switch and connects the output of the power amplifier to the antenna via said second switch said control means being set by a control signal from the receiver circuit.