振荡器
利用这些示例了解如何实现振荡器以产生周期性振荡电子信号。
精选示例
Astable Oscillator
An implementation of an astable oscillator circuit. The circuit output voltage V2 oscillates in an unstable fashion between high and low states.
LC Oscillator Based on Colpitts Circuit
An implementation of a Colpitts oscillator circuit with a nominal frequency of 9MHz. The frequency of oscillation is given by 1/(2*pi*sqrt(L1*C1*C2/(C1+C2))). LC oscillators have good frequency selectivity due to higher Q levels than are achievable with RC oscillators.
使用 555 计时器的 PWM 电路
此示例展示了在无稳态模式下使用 555 计时器实现的脉冲宽度调制 (PWM) 输出。占空比由电位计 P1 设置。该电位计在运行期间通过占空比控制旋钮控制。示波器显示了 555 计时器的输出结果。要结束仿真，请点击“停止”按钮。
Model Triangle Wave Generator Using Operational Amplifiers
Model a triangle wave generator circuit by using two Band-Limited Op-Amp blocks. The first stage of the circuit represents a comparator constructed from an op-amp. Two Diode blocks model the Zener diodes that limit the output of the comparator to plus or minus 5 V. These limits result in a square wave.
Voltage-Controlled Oscillator with PI Control
A voltage-controlled oscillator with feedback control to regulate the output voltage. The oscillation frequency is controlled by the reverse bias voltage applied to the to the varactor diode. The model shows how behavioral and component-level modeling can be mixed when designing a circuit. Provided that the variable trans-conductance device has a fast dynamic response relative to the oscillation frequency, the implementation details are not important. Similarly, the PI controller is in abstracted form, and could either be implemented with op-amps, or in software.
