ALL-ACTIVE MONOLITHIC INP-BASED HBT VCO WITH TUNABLE HEMT INDUCTOR

A novel HEMT-HBT VCO is presented; it is the first all-active analogue VCO demonstrated using InP HEMT-HBT integrated MMIC technology. The M MIC monolithically integrates an InP common-collector HBT oscillator w ith a tunable InP HEMT active inductor using selective MBE. The novel HEMT-HBT VCO can provide performance advantages over analogue VCOs suc h as the multi-vibrator, and has direct implications for high speed cl ock recovery circuits needed in InP based optoelectronic IC applicatio ns.