AMPLIFIER AND SIGNAL PROCESSING DEVICE

摘要

When a switch (SW1) is set to off, and a switch (SW2) is set to on, the voltage of a SigOut terminal (205) is stabilized with a reference voltage, and a bias voltage is applied to a capacitor (C1). Changing the switch (SW2) from on to off, with the bias voltage retained in the capacitor (C1), a detection signal which is inputted via a SigIn terminal (201) is amplified with the reference voltage as a reference, and an amplified signal is outputted from the SigOut terminal (205).