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A Compact 10-MHz RC Frequency Reference With a Versatile Temperature Compensatio
本文设计了一种紧凑的CMOS RC频率参考，采用温度补偿技术实现低温度系数。
180nm CMOS, 10MHz, ±2800 ppm (-45°C to 125°C)
CMOSRC频率参考温度补偿频率锁定环电压控制振荡器
▸使用温度依赖的参考电压抵消单电阻RC时间常数的温度系数
▸可在大多数CMOS工艺中实现，无需极性相反的电阻温度系数
▸通过修剪电容调整标称频率以补偿RC扩散
Abstract
This article presents the design and implementation
of a compact CMOS RC frequency reference. It consists of
a frequency-locked loop (FLL) that locks the period of a
voltage-controlled oscillator (VCO) to the time an RC network
takes to charge to a reference voltage. Conventionally, an RC
time constant with a near-zero temperature coefficient (TC)
is realized by using a trimmed network of resistors with dif-
ferent TCs. In this work, such a network is used to realize
a temperature-dependent refe