| 摘要 |
In order to obtain a chip, an attenuator which a circuit configuration is very simple and an accurate attenuation value is obtained is necessary. Therefore, four transistors are connected in parallel between a connecting point on a main line and a ground. Since the transistors are brought into "ON" or "OFF" state so as to function as "resistor" or "capacitor", a desired attenuation value of a passing loss can be obtained by combinations of the ON and OFF states of the respective transistors.
|
