QSpice-(4) Hierarchical Circuit Design

xutong

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QSpice-(4) Hierarchical Circuit Design

As circuits become increasingly large, it may be a bit troublesome for one person to complete the entire circuit alone, but it is not impossible. We still have to have that passion to make the circuit well. When the circuit is large, we usually put the circuit into a subcircuit. This subcircuit is equivalent to a subroutine in the C code. When we want to use this circuit, we just call it. In English, it is hierarchy.

Qspice, like most EDA software, supports hierarchical circuit design. You can click the hyperlink to view AD hierarchical design and LTspice hierarchical design.

First, we build a basic circuit diagram in QSpice and save it. After saving the diagram, right-click and select Draw Hierarchy Entry as shown in Figure 1.

Figure 1: Setting up hierarchical schematic entry

After setting the hierarchical schematic entry, set the Port in this Entry. If your small schematic needs several networks to be used externally, then you can draw several Ports. After drawing the Port, you can change the name of the Port by left-clicking. The specific settings are shown in Figure 2.

Figure 2: Placing Ports

After placing the Port, double-click Entry (X1) to enter the sub-schematic diagram to draw the circuit. Let's draw a voltage divider circuit as shown in Figure 3. After placing the voltage divider circuit, return to the main circuit to supply power as shown in Figure 4.

Figure 3: Basic voltage divider circuit

Figure 4: Voltage divider circuit

Figure 5: Simulation results

It is also worth noting that the simulation results of QSpice cannot be copied directly by pressing CTRL + C. You need to right-click and copy the bitmap to clipboard as shown in Figure 6.

Figure 6: Copying the image to the clipboard

There is another bug. After I draw the hierarchical schematic, I cannot update the port to the subcircuit when I add the port again. This needs attention! As shown in Figure 7, I will give feedback to the author later.

Figure 7: Qspice small bug

Figure 8: QSpice version

In addition, the hierarchical schematic can directly modify the netlist to change the parameters of the sub-circuit in the hierarchical schematic. Right-click netlist subcircuit in the drawing entry to view the sub-circuit netlist as shown in Figure 9.

Figure 9: Qspice subcircuit netlist view

Figure 10: Subcircuit netlist

I have a small suggestion. It is recommended to edit it directly, which may improve the efficiency of the simulation. I will submit it to Mike when the time comes.

That’s all for today. Bye~

xutong

I have sent it to the author. I am not sure if you can understand it as my grammar is not good. I will just treat it as an English practice.

xutong

An error will be reported in the console later

okhxyyo

xutong posted on 2024-6-25 09:23 An error will be reported in the console later

The host is excellent!!!!

xutong

okhxyyo posted on 2024-7-1 14:40 The host is excellent! ! ! !

Thank you for your support

laker2008

Haha, the OP's social circle has suddenly expanded to include people from foreign countries. However, the author is still a very nice person, with such timely interaction and revisions. Thumbs up.

dwwzl

It seems that Chinglish does not affect communication.

xutong

laker2008 posted on 2024-7-1 16:28 Haha, the OP's social circle has suddenly expanded to include people from foreign countries. However, the author is still a very nice person. Thumbs up for such timely interaction and revisions.

I also had some exchanges with the author of Calcpad last time, and the reply was very timely.

xutong

dwwzl posted on 2024-7-2 13:34 It seems that Chinglish does not affect communication

Yes, yes, if you can use it, you can remember it.

qwqwqw2088

AD hierarchical design, LTspice hierarchical design, it turns out that this is also possible

Learned

xutong

Play QSPICE with xutong

Timson

good

旷淬淬

It seems that everyone here is doing well in PCB design.