Patent ID: 8958498
Filing Date: 2015-02-17
Classification: H03F,H03M

Abstract:
1. A method of generating a driving signal for driving a dual mode supply modulator which provides dual supply voltages to a power amplifier, the method comprising: obtaining an envelope of a complex baseband signal to be transmitted; comparing the envelope of the complex signal with a preset threshold value; when a current envelope of the complex signal is the preset threshold value or greater or when there is a result having the preset threshold value or greater in previous N (where N is zero or a positive integer) comparisons, outputting a digital board output signal configured with a first logic level through a digital-to-analog converter; and when the current envelope of the complex signal is smaller than the preset threshold value and when there is no result having the preset threshold value or greater in the previous N comparisons, outputting a digital board output signal configured with a second logic level through the digital-to-analog converter.