| 摘要 |
<p>In an attenuator circuit, a resistor and a variable resistor are coupled in parallel and a node between the resistor and the variable resistor is coupled to a buffer circuit. The resistance of the variable resistor changes in response to a control signal given to the variable resistor so that an attenuation ratio, which is determined by the combined resistance of the resistor and the variable resistor, is established by the control signal. According to the attenuator circuit, a terminal for coupling an external component is omitted.</p> |
