CN109471013A - Pulse test method for bandwidth of HCNR200 linear optocoupler isolation circuit - Google Patents

Pulse test method for bandwidth of HCNR200 linear optocoupler isolation circuit Download PDF

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CN109471013A
CN109471013A CN201811273474.8A CN201811273474A CN109471013A CN 109471013 A CN109471013 A CN 109471013A CN 201811273474 A CN201811273474 A CN 201811273474A CN 109471013 A CN109471013 A CN 109471013A
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isolation circuit
bandwidth
linear optocoupler
hcnr200
pulse signal
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高成
寇震梦
黄姣英
王乐群
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Beihang University
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Beihang University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

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Abstract

本发明提供一种针对HCNR200线性光耦隔离电路的带宽的脉冲测试法,其步骤如下：一：选择HCNR200线性光耦隔离电路并进行配置；二：搭建测试隔离电路带宽所用的测试系统；三：对HCNR200线性光耦隔离电路开展带宽测试；四：对HCNR200线性光耦隔离电路带宽测试数据进行处理和分析；通过以上步骤，针对HCNR200线性光耦隔离电路的带宽进行测试，利用被测隔离电路对脉冲信号的响应上升沿时间与被测电路的带宽之间的关系，发挥脉冲信号频率特性的优势，达到测试HCNR200线性光耦隔离电路的带宽的目的。反映HCNR200线性光耦器件在实际应用中隔离传输高频信号的能力。

The present invention provides a pulse test method for the bandwidth of the HCNR200 linear optocoupler isolation circuit, the steps of which are as follows: 1: select the HCNR200 linear optocoupler isolation circuit and configure it; 2: build a test system for testing the bandwidth of the isolation circuit; 3: Carry out bandwidth test on HCNR200 linear optocoupler isolation circuit; four: process and analyze the bandwidth test data of HCNR200 linear optocoupler isolation circuit; through the above steps, test the bandwidth of HCNR200 linear optocoupler isolation circuit, use the tested isolation circuit to The relationship between the response rising edge time of the pulse signal and the bandwidth of the circuit under test takes advantage of the frequency characteristics of the pulse signal to achieve the purpose of testing the bandwidth of the HCNR200 linear optocoupler isolation circuit. It reflects the ability of the HCNR200 linear optocoupler device to isolate and transmit high-frequency signals in practical applications.

Description

For the pulse testing method of the bandwidth of HCNR200 linear optical coupling isolation circuit
Technical field
The present invention be directed to the pulse testing methods of the bandwidth of HCNR200 linear optical coupling isolation circuit.Mainly for by The actual needs for the isolation circuit transmission high-frequency signal that HCNR200 linear optical coupling is constituted, transmits the isolation circuit that device is constituted The ability of high-frequency signal carries out test evaluation, to show that the isolation circuit of device is able to maintain that the signal frequency model of steady operation It encloses.
Background technique
HCNR200 is a kind of typical linear optical coupling, be it is a kind of infrared light emission device and infrared optical receiving set part with And signal processing circuit etc. is encapsulated in the device in same tube socket.Input electrical signal makes hair diode (LED) shine, light-receiving Device receives optical signal and is converted into electric signal and exports.The conversion and output of " electrical-optical-electrical " are realized with this, light is as transmission Medium, realize the electrical isolation of input terminal and output end, thus HCNR200 Linear optocoupler there is signal unidirectionally to input, The features such as input/output terminal electrical isolation, strong antijamming capability, high transmission efficiency.Compared with common optical coupler, HCNR200 linear light Coupling increase has light to receive feed circuit, can be with the size of feedback regulation input signal, therefore has input and output in a linear relationship The characteristics of, the analog voltage of consecutive variations can be exported.
HCNR200 linear optical coupling is widely used in signal-isolated transmission circuit due to its excellent performance.In high frequency Bandwidth is to measure the important indicator of circuit transmission high-frequency signal ability during signal-isolated transmission.Bandwidth refers to HCNR200 The intrinsic passband of linear optical coupling isolation transmission circuit, i.e. output power of circuit reduce the pervious frequency bandwidth of half.Bandwidth Characterization isolation circuit is capable of the signal frequency range of steady operation.
The isolation circuit bandwidth test of linear optocoupler, what is applied at present is sweep check method, is mainly divided following Step carries out:
(1) isolation circuit of HCNR200 linear optical coupling is connected under special environmental condition；
(2) regulation amplitude, the sinusoidal signal of frequency is added in isolation circuit input terminal, it is defeated with oscillograph test isolation circuit The voltage peak-to-peak value of signal is denoted as V outmax；
(3) frequency for increasing input signal, makes the amplitude of output signal become 0.7Vmax, the frequency of signal is denoted as at this time f1, the as bandwidth of the isolation circuit of HCNR200 linear optical coupling.
By the above testing procedure it can be found that sweep check method needs an additional swept signal source, and frequency sweep is needed to believe The bandwidth in number source is 10 times or more of isolation circuit bandwidth to be measured.The bandwidth of HCNR200 linear optical coupling isolation circuit is 1.5MHz, it is therefore desirable to which the bandwidth of swept signal source proposes higher requirement in 15MHz or more, to swept signal source.Simultaneously Frequency sweep method needs the signal of repeatedly input different frequency, and test process is relatively complicated.
Therefore the present invention proposes the pulse test method for being directed to HCNR200 linear optical coupling isolation circuit.High frequency is not needed Swept signal source, but strobe pulse signal source；Do not need the input signal of multiple additional different frequency, but an additional arteries and veins Input signal is rushed, while analyzing the response curve of the output of isolation circuit and the relationship of bandwidth just obtains the bandwidth of isolation circuit, So that test is simpler convenient, low in cost.
Summary of the invention
1) purpose
The object of the present invention is to provide a kind of pulse test sides of bandwidth for HCNR200 linear optical coupling isolation circuit Method obtains the bandwidth of HCNR200 linear optical coupling isolation circuit, i.e. linear optical coupling isolation circuit can be with the frequency model of steady operation It encloses, thus transmittability of the accurate response HCRNR200 linear optical coupling isolation circuit for high-frequency signal.
2) technical solution
The present invention is a kind of pulse test method of bandwidth for HCNR200 linear optical coupling isolation circuit, and step is such as Under:
Step 1: selection HCNR200 linear optical coupling isolation circuit is simultaneously configured；
First search the isolation circuit in HCNR200 linear optical coupling databook, the inexpensive analogue type isolation electricity of selection high speed Road；
Then the isolation circuit of selection is configured；Protracting circuit structure chart simultaneously makes the inexpensive analogue type isolation of high speed The printed circuit board (i.e. PCB circuit board) of circuit；Resistance, triode and HCNR200 linear optical coupling are welded to PCB circuit board On；The HCNR200 linear optical coupling is dual-inline package (i.e. DIP8), the collector of 1 connecting triode Q2N3904 of pin； Pin 2 connects 5V DC voltage source；Pin 3 connects R1 resistance, and the resistance value of R1 is 68K Ω；Pin 4,5 connects ground wire；Pin 6 connects Connect the base stage of triode Q2N3906；Pin 7,8 is vacant；
Step 2: test macro used in test isolation circuit bandwidth is built；The test macro by pulse signal source, HCNR200 linear optical coupling isolation circuit, oscillograph, 5V voltage source and computer composition；
The wherein signal output end connection of the input terminal and pulse signal source of isolation circuit to be measured, the output of pulse signal source The channel probe of end connection oscillograph, the two channels probe of the output end connection oscillograph of isolation circuit to be measured, general-purpose interface Bus (i.e. GPIB) connects clock and computer, and GPIB line connects oscillograph and computer；Using 5V voltage source to isolation electricity Road powers so that they can work normally；
Step 3: bandwidth test is carried out to HCNR200 linear optical coupling isolation circuit；Pulse signal source parameter is adjusted first, Then clock is adjusted to signal and exports (output) state, made pulse signal by isolation circuit to be measured, use oscillograph Collect the input signal of isolation circuit and the response signal waveform of isolation circuit；
Wherein signal source regulative mode manually adjusts and computer regulated two ways:
Manually adjust: the rising time that pulse signal is arranged (according to the ability of pulse signal source, rises within 10ns It is the smaller the better along the time), pulse width 10us, delay time 5us, starting amplitude are 0V, the selection gist of highest amplitude Voltage range as defined in HCNR200 linear optical coupling databook, setting pulse signal highest amplitude are 5V；
Computer regulated: realizing control of the computer to pulse signal source using generic command (i.e. IEEE488.2 instruction), Parameter is inputted on interactive interface makes the rising time of pulse signal within 10ns, pulse width 10us, when delay Between be 5us, starting amplitude is 0V, voltage range as defined in the selection gist HCNR200 linear optical coupling databook of highest amplitude, Setting pulse signal highest amplitude is 5V, control clock output；
Step 4: HCNR200 linear optical coupling isolation circuit bandwidth test data is handled and is analyzed；For step 3 The response curve of the middle collected isolation circuit of oscillograph chooses response signal amplitude and rises to time note corresponding when 10% For t1, the amplitude time corresponding when rising to 90% is denoted as t2；
Be tested HCNR200 linear optical coupling isolation circuit is to the response rising time of pulse signal
τr=t2-t1
In formula: τrTo be tested HCNR200 linear optical coupling isolation circuit to the response rising time of pulse signal；
When pulse signal passes through HCNR200 linear optical coupling isolation circuit, become since the loss of high fdrequency component generates waveform Change and be embodied on response curve rising time, by the transformational analysis of time domain and frequency domain, responds rising time and circuit Bandwidth have following relationship:
In formula:
B is the isolation circuit bandwidth of HCNR200 linear optical coupling device；
It can thus be concluded that the bandwidth of HCNR200 linear optical coupling isolation circuit；
By above step, when using HCNR200 linear optical coupling isolation circuit to the response signal rising edge of pulse signal Between relationship between the bandwidth of circuit, play the advantage of pulse signal frequency characteristic, reached test HCNR200 linear optical coupling The purpose of the bandwidth of isolation circuit；The signal of transmission can be isolated in practical application for test HCNR200 linear optical coupling Frequency range has important reference significance；The present invention does not need external high-frequency signal source for sweep check to produce Raw high_frequency sine wave signal, but tested using pulse signal source, testing cost can be saved；Multiple frequency sweep is replaced to obtain The complex steps of the bandwidth of HCNR200 linear optical coupling isolation circuit, by the input of pulsatile once signal and a response signal Analysis can obtain the bandwidth of HCNR200 linear optical coupling isolation circuit, it is simpler convenient.
3) advantage and effect
The present invention provides a kind of pulse testing method of bandwidth for HCNR200 linear optical coupling isolation circuit.The invention Advantage is: for sweep check, not needing external high-frequency signal source to generate high_frequency sine wave signal, but uses arteries and veins It rushes signal source to be tested, testing cost can be saved；Multiple frequency sweep is replaced to obtain the band of HCNR200 linear optical coupling isolation circuit Wide complex steps can obtain HCNR200 linear light by the input of pulsatile once signal and the analysis of a response signal The bandwidth of coupling isolation circuit is simpler convenient.
Detailed description of the invention
The inexpensive analogue type isolation circuit of Fig. 1 HCNR200 high speed.
Fig. 2 the method for the invention flow chart.
Fig. 3 present invention tests connection figure.
Fig. 4 pulse signal source setting of the present invention.
Symbol code name is described as follows in figure:
Vcc1It is 5V voltage source
Vcc2It is 5V voltage source
VinIt is pulse signal
VoutIt is the response signal of HCNR200 linear optical coupling isolation circuit
LED is light emitting diode
PD1 is photodiode
PD2 is photodiode
R1-R7 is resistance
Q1-Q4 is triode
Specific implementation method
Test method described in the invention is tested by taking the HCNR200 linear optical coupling that TI company produces as an example.Selection Pulse signal source be Keysight company production 33500B series waveform generator, circuit-under-test is HCNR200 linear light The high speed low cost analogue type isolation circuit (as shown in Figure 1) of coupling, oscillograph use the TBS2000 model oscillography of Imtech Device.
The present invention is a kind of pulse test method of bandwidth for HCNR200 linear optical coupling isolation circuit, flow chart As shown in Fig. 2, its specific implementation step is as follows:
Step 1: selection HCNR200 linear optical coupling isolation circuit is simultaneously configured.
Search the isolation circuit in HCNR200 databook, the inexpensive analogue type isolation circuit of selection high speed.It uses Altium Designer Software on Drawing circuit diagram simultaneously makes pcb board, includes triode, resistance and line by required component Property optocoupler HCNR200 be welded on pcb board, pin 1 connects the collector of Q2N3904；Pin 2 connects 5V DC power supply；Pipe Foot 3 connects R1 resistance, and R1 resistance value is 68K Ω；Pin 4,5 connects ground wire；The base stage of the connection of pin 6 Q2N3906；Pin 7,8 is empty It sets.
Step 2: test macro used in test isolation circuit bandwidth is built.Test macro is believed by 33500B series of pulses Number source, HCNR200 linear optical coupling isolation circuit, the oscillograph of TBS2000 model, 5V voltage source and computer composition.
Test macro used in test isolation circuit bandwidth is built according to system shown in Figure 3 structure.Wherein isolation electricity to be measured The input terminal on road is connect with the output end of pulse signal source 33500B, and the channel probe of TBS2000 oscillograph is isolated with to be measured The input terminal of circuit connects, and two channels probe is connect with the output end of isolation circuit to be measured, connects 33500B pulse with GPIB line Source and computer connect TBS2000 oscillograph and computer with GPIB line.It can to isolation circuit power supply using 5V voltage source It is enough to work normally.
Step 3: carrying out bandwidth test to HCNR200 linear optical coupling isolation circuit, first adjusting pulse signal source parameter, Then clock is adjusted to output state, makes pulse signal by isolation circuit to be measured, collect isolation using oscillograph Circuit input signal and isolation circuit response signal waveform.
Pulse signal source parameter is adjusted according to method shown in Fig. 4, wherein signal source regulative mode is manually adjusted and calculated Machine adjusts two ways.
Manually adjust: by pulse along the rise time be adjusted to 8.4ns (pulse of 33500B series of pulses signal source it is most short on Rise the time), pulse width 10us, delay time 5us, according to voltage model as defined in HCNR200 linear optical coupling databook It encloses, selecting starting amplitude is 0V, output amplitude 5V.
Computer regulated: computer and signal source interactive interface are produced using Labview, in Labview interactive interface Input response parameter make pulse along the rise time be 8.4ns (33500B series of pulses signal source pulse most short rising when Between), pulse width 10us, delay time 5us, according to voltage range as defined in HCNR200 linear optical coupling databook, choosing Selecting starting amplitude is 0V, output amplitude 5V, and control signal source is exported.
Step 4: using the function for the reading rise time that the oscillograph of TBS2000 model has, it can be observed that isolation The rise time of the response signal of circuit is 220.7ns.Then
τr=220.7ns
Relationship between curve rise time and circuit pass band according to response, obtains:
Then the bandwidth for obtaining the isolation circuit of HCNR200 Linear optocoupler is 1.585MHz.

Claims (3)

1.一种针对HCNR200线性光耦隔离电路的带宽的脉冲测试方法，其特征在于：其步骤如下：1. a pulse test method for the bandwidth of the HCNR200 linear optocoupler isolation circuit, is characterized in that: its steps are as follows: 步骤一：选择HCNR200线性光耦隔离电路并进行配置；Step 1: Select the HCNR200 linear optocoupler isolation circuit and configure it; 先查找HCNR200线性光耦数据手册中的隔离电路，选择高速低成本模拟型隔离电路；First find the isolation circuit in the HCNR200 linear optocoupler data sheet, and choose a high-speed low-cost analog isolation circuit; 然后对选择的隔离电路进行配置；绘制电路结构图并制作高速低成本模拟型隔离电路的印制电路板即PCB电路板；将电阻、三极管和HCNR200线性光耦焊接到PCB电路板上；该HCNR200线性光耦为双列直插式封装即DIP8，管脚1连接三极管Q2N3904的集电极；管脚2连接5V DC电压源；管脚3连接R1电阻；管脚4、5连接地线；管脚6连接三极管Q2N3906的基极；管脚7、8空置；Then configure the selected isolation circuit; draw the circuit structure diagram and make the printed circuit board of the high-speed low-cost analog isolation circuit, that is, the PCB circuit board; solder the resistor, triode and HCNR200 linear optocoupler to the PCB circuit board; The linear optocoupler is a dual in-line package, namely DIP8, pin 1 is connected to the collector of the transistor Q2N3904; pin 2 is connected to a 5V DC voltage source; pin 3 is connected to R1 resistor; 6 Connect the base of the transistor Q2N3906; pins 7 and 8 are vacant; 步骤二：搭建测试隔离电路带宽所用的测试系统；该测试系统由脉冲信号源、HCNR200线性光耦隔离电路、示波器、5V电压源和计算机组成；Step 2: Build a test system for testing the bandwidth of the isolation circuit; the test system consists of a pulse signal source, a HCNR200 linear optocoupler isolation circuit, an oscilloscope, a 5V voltage source and a computer; 其中待测隔离电路的输入端与脉冲信号源的信号输出端连接，脉冲信号源的输出端连接示波器的一通道探头，待测隔离电路的输出端连接示波器的二通道探头，通用接口总线即GPIB连接脉冲源与计算机，GPIB线连接示波器与计算机；使用5V电压源对隔离电路供电使其能够正常工作；The input end of the isolation circuit to be tested is connected to the signal output end of the pulse signal source, the output end of the pulse signal source is connected to the one-channel probe of the oscilloscope, the output end of the isolation circuit to be tested is connected to the two-channel probe of the oscilloscope, and the general interface bus is GPIB Connect the pulse source to the computer, and the GPIB line to connect the oscilloscope to the computer; use a 5V voltage source to power the isolation circuit so that it can work normally; 步骤三：对HCNR200线性光耦隔离电路开展带宽测试；首先调节脉冲信号源参数，然后将脉冲源调整至信号输出状态，使脉冲信号通过待测隔离电路，使用示波器采集到隔离电路的输入信号和隔离电路的响应信号波形；Step 3: Carry out a bandwidth test on the HCNR200 linear optocoupler isolation circuit; first adjust the parameters of the pulse signal source, then adjust the pulse source to the signal output state, so that the pulse signal passes through the isolation circuit to be tested, and use an oscilloscope to collect the input signal and the output signal of the isolation circuit. The response signal waveform of the isolation circuit; 步骤四：对HCNR200线性光耦隔离电路带宽测试数据进行处理和分析；针对步骤三中示波器采集到的隔离电路的响应曲线，选取响应信号幅值上升至10％时所对应的时间记为t1，幅值上升至90％时所对应的时间记为t2；Step 4: Process and analyze the bandwidth test data of the HCNR200 linear optocoupler isolation circuit; according to the response curve of the isolation circuit collected by the oscilloscope in step 3, select the time corresponding to when the amplitude of the response signal rises to 10% and record it as t 1 , the time corresponding to when the amplitude rises to 90% is recorded as t 2 ; 被测HCNR200线性光耦隔离电路对脉冲信号的响应上升沿时间为The rising edge time of the tested HCNR200 linear optocoupler isolation circuit to the pulse signal is: τr＝t2-t1 τ r =t 2 -t 1 式中：τr为被测HCNR200线性光耦隔离电路对脉冲信号的响应上升沿时间；In the formula: τ r is the rising edge time of the measured HCNR200 linear optocoupler isolation circuit to the pulse signal; 当脉冲信号通过HCNR200线性光耦隔离电路时，由于高频分量的丢失产生波形变化并体现在响应曲线上升沿时间上，经过时域和频域的转换分析，响应上升沿时间与电路的带宽具有如下的关系：When the pulse signal passes through the HCNR200 linear optocoupler isolation circuit, the waveform change due to the loss of high-frequency components is reflected in the rising edge time of the response curve. After conversion analysis in the time domain and frequency domain, the response rising edge time and the bandwidth of the circuit have The following relationship: 式中：B是HCNR200线性光耦器件的隔离电路带宽；In the formula: B is the isolation circuit bandwidth of the HCNR200 linear optocoupler device; 由此得HCNR200线性光耦隔离电路的带宽；From this, the bandwidth of the HCNR200 linear optocoupler isolation circuit is obtained; 通过以上步骤，利用HCNR200线性光耦隔离电路对脉冲信号的响应信号上升沿时间与电路的带宽之间的关系，发挥脉冲信号频率特性的优势，达到了测试HCNR200线性光耦隔离电路的带宽的目的；对于测试HCNR200线性光耦在实际应用时能够隔离传输的信号的频率范围具有重要的参考意义；本发明相对于扫频测试而言，不需要外加高频信号源来产生高频正弦波信号，而是采用脉冲信号源进行测试，能节约测试成本；取代多次扫频得出HCNR200线性光耦隔离电路的带宽的复杂步骤，经过一次脉冲信号的输入和一次响应信号的分析就能得到HCNR200线性光耦隔离电路的带宽，更加简单便捷。Through the above steps, the relationship between the rising edge time of the response signal of the HCNR200 linear optocoupler isolation circuit to the pulse signal and the bandwidth of the circuit is used to take advantage of the frequency characteristics of the pulse signal, and the purpose of testing the bandwidth of the HCNR200 linear optocoupler isolation circuit is achieved. ; It has important reference significance for testing the frequency range of the signal transmitted by the HCNR200 linear optocoupler in practical application; compared with the frequency sweep test, the present invention does not require an external high-frequency signal source to generate a high-frequency sine wave signal, Instead, the pulse signal source is used for testing, which can save the test cost; instead of the complicated steps of obtaining the bandwidth of the HCNR200 linear optocoupler isolation circuit by multiple frequency sweeps, the HCNR200 linearity can be obtained after one pulse signal input and one response signal analysis. The bandwidth of the optocoupler isolation circuit is simpler and more convenient. 2.根据权利要求1所述的一种针对HCNR200线性光耦隔离电路的带宽的脉冲测试方法，其特征在于：2. a kind of pulse testing method for the bandwidth of HCNR200 linear optocoupler isolation circuit according to claim 1, is characterized in that: 在步骤一中所述的该HCNR200线性光耦为双列直插式封装即DIP8，其管脚3连接R1电阻，该R1的阻值为68KΩ。The HCNR200 linear optocoupler described in step 1 is a dual in-line package, namely DIP8, and its pin 3 is connected to the R1 resistor, and the resistance value of the R1 is 68KΩ. 3.根据权利要求1所述的一种针对HCNR200线性光耦隔离电路的带宽的脉冲测试方法，其特征在于：3. a kind of pulse testing method for the bandwidth of HCNR200 linear optocoupler isolation circuit according to claim 1, is characterized in that: 在步骤三中所述的调节脉冲信号源参数，其信号源调节方式有手动调节和计算机调节两种方式：In the adjustment of the pulse signal source parameters described in step 3, the signal source adjustment methods include manual adjustment and computer adjustment: 手动调节：设置脉冲信号的上升沿时间在10ns以内(根据脉冲信号源的能力，上升沿时间越小越好)，脉冲宽度为10us，延时时间为5us，起始幅值为0V，最高幅值的选择依据HCNR200线性光耦数据手册规定的电压范围，设置脉冲信号最高幅值为5V；Manual adjustment: Set the rising edge time of the pulse signal within 10ns (according to the capability of the pulse signal source, the smaller the rising edge time, the better), the pulse width is 10us, the delay time is 5us, the initial amplitude is 0V, and the maximum amplitude is 0V. The selection of the value is based on the voltage range specified in the HCNR200 linear optocoupler data sheet, and the maximum amplitude of the pulse signal is set to 5V; 计算机调节：利用通用命令即IEEE488.2指令实现计算机对脉冲信号源的控制，在交互界面上输入参数使得脉冲信号的上升沿时间在10ns以内，脉冲宽度为10us，延时时间为5us，起始幅值为0V，最高幅值的选择依据HCNR200线性光耦数据手册规定的电压范围，设置脉冲信号最高幅值为5V，控制脉冲源输出。Computer adjustment: use the general command ie IEEE488.2 command to realize the computer control of the pulse signal source, input parameters on the interactive interface so that the rising edge time of the pulse signal is within 10ns, the pulse width is 10us, the delay time is 5us, and the start The amplitude is 0V, and the selection of the highest amplitude is based on the voltage range specified in the HCNR200 linear optocoupler data manual. Set the highest amplitude of the pulse signal to 5V to control the output of the pulse source.
CN201811273474.8A 2018-10-30 2018-10-30 Pulse test method for bandwidth of HCNR200 linear optocoupler isolation circuit Pending CN109471013A (en)

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Application publication date: 20190315