Patent ID: 6178309
Filing Date: 2001-01-23
Classification: H03G,H04B

Abstract:
A method for setting a threshold voltage in an electronic device having a power amplifier for amplifying a signal, an automatic gain controller for controlling an output power from the power amplifier so that the output power becomes a predetermined first power, said automatic gain controller configured to receive voltage from an stabilizing power supply, a detector for detecting the output power from the power amplifier, a memory for storing a predetermined voltage indicative of the output power detected by the detector when the output power is essentially equal to a predetermined second power which is smaller than the predetermined first power, a comparator for comparing a detected voltage, indicative of the output power detected by the detector, with the predetermined voltage stored in the memory, a battery for supplying power to the automatic gain controller, and a connector for connecting a stabilizing power supply to the automatic gain controller, the method comprising:connecting the stabilizing power supply to the automatic gain controller;supplying a voltage from the stabilizing power supply to the automatic gain controller through the connector without supplying power to the automatic gain controller from the battery;detecting an output power from the power amplifier while the stabilizing power supply supplies the voltage to the automatic gain controller;changing the voltage supplied from the stabilizing power supply until the detected output power is less than or equal to the predetermined second power;determining a detected voltage indicative of the detected output power when the detected output power is essentially equal to the predetermined second power; andstoring the determined detected voltage in the memory as the predetermined voltage, whereby the stored predetermined voltage is the threshold voltage and is based on individual power requirements of the electronic device.