Patent ID: 8575992
Filing Date: 2013-11-05
Classification: H03K,H04B

Abstract:
1. A switch comprising: an input terminal to which a high frequency signal is input; a first switching unit connected between the input terminal and a first output terminal from which the high frequency signal input to the input terminal is output, and selectively outputting the high frequency signal input to the input terminal through the first output terminal; and a second switching unit connected between the input terminal and a second output terminal from which the high frequency signal input to the input terminal is output, and selectively outputting the high frequency signal input to the input terminal through the second output terminal, wherein the first switching unit includes: a first impedance transformer installed on a first signal line between the input terminal and the first output terminal and transforming impedance; a first bipolar transistor having an emitter grounded, a collector connected to the first signal line, and a base receiving a current according to a first control voltage applied thereto, the first control voltage controlling a switching operation in the first switching unit; and a second bipolar transistor having a collector grounded, an emitter connected to the first signal line, and a base receiving the current according to the first control voltage applied thereto, and the second switching unit includes: a second impedance transformer installed on a second signal line between the input terminal and the second output terminal and transforming impedance; a third bipolar transistor having an emitter grounded, a collector connected to the second signal line, and a base receiving a current according to a second control voltage applied thereto, the second control voltage controlling a switching operation in the second switching unit; and a fourth bipolar transistor having a collector grounded, an emitter connected to the second signal line, and a base receiving the current according to the second control voltage applied thereto.