| 摘要 |
A peak detector generates a signal representing the occurrence of a peak in an input signal waveform each time the slope of the input signal waveform reverses and travels through a dead zone defined by the difference between two different reference voltages. The dead zone which prevents short term reversals in the input signal waveform due to noise and other aberrations from generating signals representing valid peaks and which is defined by the difference between the two reference voltages is easily adjusted such as by varying the value of a single resistor in one embodiment to adapt the peak detector circuit to different input signal waveform situations. A common terminal which is coupled to the two different reference voltages through opposite voltage-responsive devices has a voltage which varies directly in response to the input signal waveform as applied thereto by a voltage coupling device such as a capacitor. The voltage-responsive devices maintain the voltage of the common junction within the range defined by the two different reference voltages by conducting whenever the common junction voltage equals either of the reference voltages. Alternate conductions of the voltage-responsive devices are used to trigger a bistable device which provides an accurate representation of the peaks of the input signal waveform. |
