The Dso Channels And Trigger Circuit Module Design Study

Digital Storage Oscilloscope (DSO) is a new instrument with the development of digital technology in recent years. It is an Oscilloscope that use of ADC technology converts analog signal into digital signal and recurrence of storage. The DSO channel and the triggering circuit are one of DSO most important constituents. Its performance's quality had decided directly the oscilloscope surveys precision and scope.The theme of this paper is to design " DSO channel and triggering circuit module design research ". Its primary includes channel circuit design, triggering channel circuit design, channel control circuit design and circuit's antijamming design. In low cost situation, completes the high smoothness of the DSO channel design.Signal channel consists of attenuating circuit, impedance transformation circuit and amplification circuit. After through these circuits the external signal was sent to A/D converts. For attenuating circuit and amplification circuit can work better, we should add impedance transformation circuit to this two circuits, which can transform high imputing impedance into low outputting impedance. The amplifying circuit is composed of the voltage control gain amplifying circuit and the output driving circuit,and the former control gain size, the latter enhances the channel's driving load capacity.Triggering channel consists of trigger source choice circuit, coupling type choice circuit, and trigger comparator. The channel control circuit is the DSO channel's control system, which accepts the exterior input information, then transforms this information into many control signals that controls the DSO channel's work.