Patent ID: 6512409
Filing Date: 2003-01-28
Classification: H03K

Abstract:
A signal switching circuit comprising:a first input terminal to which a first signal is inputted; a second input terminal to which a second signal is inputted; first and second output terminals from which one of the first and the second signals is outputted, first to fourth diode pairs each comprising two diodes which are connected together in series, the first to fourth diode pairs being disposed respectively between the first input terminal and the first output terminal, between the second input terminal and the first output terminal, between the first input terminal and the second output terminal, and between the second input terminal and the second output terminal; and first to fourth capacitor circuits connected respectively between diode-to-diode connection points in the respective diode pairs and the ground, wherein one of the first and the second diode pairs is rendered conductive in an alternative manner, one of the third and the fourth diode pairs is rendered conductive in an alternative manner, and a low pass filter for passing therethrough the corresponding first or second signal includes residual inductance in each of the diode pairs thus rendered conductive and the associated capacitor circuit.