摘要
通过分析传统CMOS振荡电路由于控制回路存在延迟时间,导致输出波形存在上冲下冲的缺点。设计一种新颖的1MHzCMOS方波振荡电路,该振荡电路的频率完全由电路的延迟时间来产生,通过对控制回路的延迟时间进行控制,就可以实现对该CMOS振荡电路的频率精度稳定性的调整。仿真波形显示表明,输入电压VIN从2.7V到6V有较大范围的变化时,该振荡电路的频率依然保持在0.9MHz到1.05MHz之间,误差范围为±0.5%左右,说明本文设计的CMOS振荡器电路具有较高的稳定性和精度,设计成功。
A novel oscillator which generates a precise 1MHz frequency pulse wave is introduced in this paper. The frequency is determined by the delay time of the circuit, and it could be changed by adjusting the lagging time of the control branch. According to the result of simulation, the error percentage of the circuit is within ±5% when VIN fluctuates between 2.7V to 6V.
出处
《计算机与数字工程》
2007年第7期165-168,共4页
Computer & Digital Engineering
