A Design of Voltage-to-Frequency Converter

입력전압에 비례하는 주파수 신호 생성 회로의 설계

In this work, a Voltage-to-Frequency Converter.(VFC) in which the output frequency is proportional to the input voltage is proposed. To obtain temperature stable characteristics the VFC is designed by using two bandgap references. The difference between simulated and calculated values is less than about 5% in output characteristics. In the VFC using BiCMOS the temperature variation of sample output frequencies is less than $\pm$0.5% in the temperature range -$25^{\circ}C$ to 75$^{\circ}C$. And the CMOS VFC has error less than $\pm$0.8% in the temperature range -$25^{\circ}C$ to 75'$^{\circ}C$.