Patent ID: 8325946
Filing Date: 2012-12-04
Classification: H03F,H03G,H03K

Abstract:
1. An input selector comprising: a first input port and a second input port configured to receive a first input signal and a second input signal, respectively; a first resistor arranged such that one terminal thereof is connected to the first input port; a second resistor arranged such that one terminal thereof is connected to the second input port, and such that a first reference voltage is applied to the other terminal thereof; a first selector configured to receive the second input signal and a second reference voltage, and to select one from among the input signals thus received; a first buffer configured to receive an output signal of the first selector, and to output the signal thus received to the other terminal of the first resistor; and an output circuit having a first input terminal, a second input terminal, and an output terminal, and configured to be capable of switching the state between at least one state selected from among a state in which a signal received via the first input terminal is output and a state in which a signal received via the second input terminal is output, and a state in which a signal is output according to the difference between the signal received via the first input terminal and the signal received via the second input terminal, wherein the output circuit receives the first input signal via the first input terminal, and receives the second input signal via the second input terminal.