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各位高手，大虾们，LM2907是接上资料上说得R1,C1和C2就可以将频率转换成电压了吗？<br />还有资料上面“The input threshold voltage is the amount of<br />differential input voltage at which the output of this stage<br />changes state. Two options (LM2907-8, LM2917-8) have<br />one input internally grounded so that an input signal must<br />swing above and below ground and exceed the input thresholds<br />to produce an output.”<br />是说频率需要正负电压变化吗？单电压的频率不可以吗？<br />非常感谢了 |
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楼主
