BALANCED MODULATOR

专利名称：BALANCED MODULATOR 发明人：NAKAMURA FUMIHISA
申请号：JP4375089
申请日：19890223
公开号：JPH02222309A
公开日：
19900905
专利内容由知识产权出版社提供
摘要：PURPOSE:To obtain a balanced modulator of simple constitution being suitable for a MOS transistor by forming a forward turn signal and an inversion signal of an input signal by a forward turn amplifier and an inversion amplifier, respectively, and switching and outputting them alternately by an analog switch. CONSTITUTION:A first input signal of a frequency (fsig) is inputted in parallel to a forward turn amplifier 1 and an inversion amplifier 2, an output 3 of the forward turn amplifier 1 and an output 4 of the inversion amplifier 2 are inputted to an analog switch SW1 and an analog switch SW2, respectively, and output sides of both the switches SW1, SW2 are connected and come to an output terminal OUT. The analog switches SW1, SW2 are brought to ON/OFF control by an input pulse signal of a second input terminal IN2. To the IN2, an input pulse signal of a higher frequency (fcar) than that of a first input signal (fsig) is inputted, the SW1 is turned ON when the IN2 is a negative input, the SW2 is turned ON at the time of a positive input, and both the switches SW1, SW2 are turned ON/OFF alternately. In such a way, the balanced modulator whose component is a MOS transistor can be realized.
申请人：MATSUSHITA ELECTRIC IND CO LTD
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