A Realization Method of CMOS Temperature Characteristics Compensation Circuit for TCXO

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  • ＣＭＯＳ回路を用いたＴＣＸＯ用温度特性補償回路の構成法
  • CMOS カイロ オ モチイタ TCXOヨウ オンド トクセイ ホショウ カイロ ノ コウセイホウ

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Abstract

The “Temperature Compensated Crystal Oscillator (TCXO)" is widely used as a stable frequency source of mobile communication equipment. Demand for low-power operation of TCXOs stimulates the development of fully integrated CMOS analog TCXOs. A TCXO is composed of a voltage controlled crystal oscillator and a temperature characteristics compensation circuit. We have proposed a new CMOS temperature characteristics compensation circuit for TCXO. The proposed circuit is composed of a new temperature sensor and a new compensation function generator. The performance of the proposed sensor and compensation function generator are estimated by simulation. And the total performance of TCXO is estimated. The compensated frequency deviation is within ± 0.5ppm.

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