An Oscillator Design Based on MOS-NDR Inverter
نویسندگان
چکیده
First, we create a MOS-NDR (negative differential resistance) cell and then put two MOS-NDR cells in cascode (totem-pole) structure. With MOBILE (monostable-bistable transition logic element) theorem we can built a MOS-NDR inverter by placing a NMOS in parallel with the lower part of the cascode structure. The MOS-NDR inverter cascades two Common-Source amplifier and feedback to MOS-NDR inverter. The circuit will start an oscillation. Such a phenomenon is similar to ring oscillator. The frequency of the MOS-NDR oscillator will be 116 MHz when voltage is 2.7 volts. Those MOS-NDR devices are adapted from CIC standard 0.35um CMOS process.
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