A necessary condition for oscillation(振荡) is that there be no phase shift(相位移) between the input and output of the feedback network(反馈网路).
举一反三
- In<br/>the hybrid equivalent model, hfe<br/>is the expression for __()()____. A: input impedance B: voltage feedback ratio C: small-signal current gain D: output admittance
- The production function is the A: increase in the amount of output from an additional unit of labor. B: marginal product of an input times the price of output. C: relationship between the quantity of inputs and output. D: shift in labor demand caused by a change in the price of output.
- 分组密码工作模式主要有EBC（Electronic Code Book，电子密码本）、CBC（Cipher Block Chaining，密文链接）、CFB（Cipher Block FeedBack，密文反馈）、OFB（Output FeedBack，输出反馈）与CTR（Counter，计数器）等模式
- Which of the following is not a phase in the design of a global supply chain network?
- 决定振荡电路的振荡频率的是( ) A: 放大倍数 B: 反馈系数 C: 选频网路参数