Principle and Method of Connecting Circuit for GGD-331 Peak Holding Instrument

Shanghai Automation InstrumentationGGD-331Principle and method of connecting circuit for peak holding instrument

GGD-331 Peak HolderWorking principle: Peak holding device, it is a circuit that can remember the peak value of a signal, and its output voltage is the magnitude of the signal,

Always follow the peak value of the input signal and maintain it at the maximum peak value of the input signal.

Shanghai Automation Instrument Co., LtdThe peak holding device circuit connection

whenV1>V. Time: The signal is generated by（+）Join the end,OPAThe outputVaFor positive voltage, diodeDConducts, so the output current passes throughDRegarding capacitorsCCharge continuously until it matchesViEqual voltage. (When)DWhen conducting electricity, this circuit functions like a voltage follower whenV1<V. Time:OPAThe outputVaTo reverse bias, it is equivalent to an open circuit, so the capacitorCMaintain at the maximum input voltage without charging or discharging.

Among them, the output waveformV0，Always maintain the input waveformViThe most significant peak value.

The use of quasi peak detection is a characteristic of civilian electromagnetic interference emission testing, as the standards for civilian electromagnetic compatibility product families are based onCISPRTranslated from standards, these standards are all formulated to ensure smooth communication and broadcasting. Therefore, the impact of interference on communication and broadcasting is ultimately judged by subjective auditory effects. Average detection and peak detection are not sufficient to describe the impact of pulse amplitude, width, and frequency on vision, and quasi peak detection must be used. Only quasi peak detection is more in line with the human ear's response to sound.