摘要
以传统的Wien bridge电压模振荡器为原型,根据网络与其伴随网络传输函数相同的特点,用伴随运算放大器(AOA)和分立电阻及电容设计出Wien bridge电流模式振荡器,该电路不仅具有速度高、频率高、电压低及功耗小等电流模电路的特点,而且振荡频率和输出幅度可独立的调谐;振荡频率和输出幅度与负载大小无关;振荡频率受寄生电容影响小,输出频率的精确度、稳定度高,电路比较简单,既适合分立电路使用,亦适合VLSI单片集成。计算机仿真证明该设计正确.
On the basis of identity of transmission function between a network and its adjoint network and the voltage-mode Wien bridge sinusoidal oscillator, a current-mode Wien bridge sinusoidal oscillator was designed by using AOA and separated resistors and capacitors. This circuit exhibited not only high speed, high-frequency, low-voltage, and low power consumption but also independent tuning of its oscillation frequency and output amplitude. The frequency and amplitude were independent of the load, and parasite capacity. The accuracy and sensitivity of oscillation frequency were higher and the circuit was simpler, making it suitable for VLSI monolithic integration. Compute simulating result showed that this design was valid.
出处
《兰州理工大学学报》
CAS
北大核心
2007年第3期161-163,共3页
Journal of Lanzhou University of Technology
基金
咸阳师范学院专项科研基金（05xsyk204）的资助
作者简介
李永安（1961-），男，陕西三原人，教授．
