摘要
A voltage-controlled ring oscillator （VCO） based on a full enhancement-mode InAlAs/InGaAs/InP high electron mobility transistor （HEMT） logic is proposed. An enhancement-mode HEMT （E-HEMT） is fabricated, whose threshold is demonstrated to be 10 mV. The model of the E-HEMT is established and used in the SPICE simulation of the VCO. The result proves that the full E-HEMT logic technology can be applied to the VCO. And compared with the HEMT DCFL technology, the complexity of our fabrication process is reduced and the reliability is improved.
A voltage-controlled ring oscillator （VCO） based on a full enhancement-mode InAlAs/InGaAs/InP high electron mobility transistor （HEMT） logic is proposed. An enhancement-mode HEMT （E-HEMT） is fabricated, whose threshold is demonstrated to be 10 mV. The model of the E-HEMT is established and used in the SPICE simulation of the VCO. The result proves that the full E-HEMT logic technology can be applied to the VCO. And compared with the HEMT DCFL technology, the complexity of our fabrication process is reduced and the reliability is improved.
