Application of Negative Capacitance Circuit to Extend Variable Frequency Range of On-Chip VCO

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  • オンチップVCOの周波数可変範囲拡大の検討
  • オンチップ VCO ノ シュウハスウ カヘン ハンイ カクダイ ノ ケントウ

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Abstract

In recent years, there is an increasing demand for monoIithic VCO with a wide frequency range for use with high data rate mobile transceivers, etc. Conventional on-chip LC oscillators using varactors suffer from narrow tuning range, due to limited variable capacitance range of on-chip varactors. This paper presents a technique for extending the variable frequency range of on-chip VCO, by using negative capacitance circuit to cancel out the varactor's fixed capacitance.

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