| 摘要 |
A switching circuit which can operate on a single low voltage. A plurality (i=0-n) of series circuits of a capacitor (Ci) and the drain source of an MOS-FET (Qi) are connected in parallel between a first terminal (T1) and a second terminal (T0). In each series circuit, a pull-up resistor (Ri) is connected between the output terminal of an inverter (Ai) and the joint of the capacitor (Ci) and the MOS-FET (Qi). Each bit (bi) of digital data for capacity control is fed to the gate of the MOS-FET (Qi) and the inverter (Ai) thus obtaining a capacitance dependent on the value of the digital data between first terminal (T1) and the second terminal (T0). ® KIPO & WIPO 2009 |
