Patent ID: 7664473
Filing Date: 2010-02-16
Classification: H03F

Abstract:
1. An amplifying device which receives and amplifies a transmission signal having a property of a burst, comprising: an amplifier to amplify the transmission signal; and a control device to take a control of a bias voltage applied to the amplifier based on information relating to ON/OFF of the transmission signal, wherein the control device takes a first control of the bias voltage such that the bias voltage has a first voltage value, during a transmission OFF period that ends a predetermined time period before a time at which the transmission signal is turned from OFF to ON, the control device takes a second control of the bias voltage such that the bias voltage has a second voltage value which is higher than the first voltage value, during a transmission ON period that starts when the transmission signal is turned from OFF to ON, and the control device takes a third control of the bias voltage such that the bias voltage has a third voltage value which is higher than the second voltage value, during a transmission ON transient period that starts when the transmission OFF period ends and that ends when the transmission ON period starts.