? A general question. How does this varactor diode represent?

btty038

? A general question. How does this varactor diode represent? [Copy link]

 

I will just post a picture? ?

btty038

When drawing, for example, SCH and PCB?

freebsder

First time seeing this device

qwqwqw2088

PCB packaging is easy to say, it only has 2 pins

The schematic diagram on the right side of the first floor is fine.

btty038

freebsder posted on 2021-1-11 23:19 This is the first time I have seen this kind of device

I have used this many times. There is really no way to express it. I am here to ask for advice.

btty038

qwqwqw2088 posted on 2021-1-12 08:33 PCB packaging is easy to say, just the 2-pin schematic diagram on the right side of the first floor will do

1. Wrong question. For example, how is the simulation in CAD software solved? Add voltage or model
2. Please advise

qwqwqw2088

btty038 posted on 2021-1-12 12:26 Wrong question. For example, how is the simulation in CAD software solved? Add voltage or model. Please advise

Apply voltage

When a reverse DC voltage is applied, the junction capacitance of the varactor changes.

btty038

qwqwqw2088 posted on 2021-1-12 14:11 Adding voltage plus reverse DC voltage, when the magnitude of the applied reverse voltage changes, the junction capacitance of the varactor diode changes

Can you show me a sample? Wouldn't that make it normal? Or do I need to add some extra conditions?

btty038

qwqwqw2088 posted on 2021-1-12 14:11 Adding voltage plus reverse DC voltage, when the magnitude of the applied reverse voltage changes, the junction capacitance of the varactor diode changes

This

qwqwqw2088

btty038 posted on 2021-1-12 17:26 Can you list it? Wouldn't it become normal? Or do I need to add some additional conditions?

The 6th floor owner said he wanted to simulate

Try circuit simulation

chunyang

Does "how to indicate" refer to the component symbol? Then both the right picture and the 9th floor picture in the original post are fine. The domestic standard is the 9th floor picture.

btty038

chunyang posted on 2021-1-12 23:42 Does "how to indicate" refer to the component symbol? Then both the right picture and the 9th floor picture in the original post are fine. The domestic standard is the 9th floor picture.

Teacher, I want to use it to express how to make it clear. This package and SCH diagram are clear, but I can't find the physical reference

btty038

chunyang posted on 2021-1-12 23:42 Does "how to indicate" refer to the component symbol? Then both the right picture and the 9th floor picture in the original post are fine. The domestic standard is the 9th floor picture.

I choose a diode and enter the parameters myself.

For example, this Siemens

btty038

qwqwqw2088 posted on 2021-1-12 22:06 The 6th floor host said he wanted to simulate the circuit and try it out

btty038

chunyang posted on 2021-1-12 23:42 Does "how to indicate" refer to the component symbol? Then both the right picture and the 9th floor picture in the original post are fine. The domestic standard is the 9th floor picture.

Teacher, is it the picture I returned to 14? Do I put all the parameters in and build it myself or does the manufacturer have it? Then did you find it? Please give me some advice. Thank you

chunyang

It seems that you want to simulate, so search for the varactor model in the device library, if it is there, then it is there, if not, then it is not there. It may be unrealistic to build the library yourself.

btty038

It seems that you want to simulate, then search for the model of the varactor in the device library, if it exists, it will be there, if it doesn't exist, it won't be there. I'm afraid it's not realistic to build a library yourself.

I don't know if it's right, but I have found a preliminary solution. Thank you to the two teachers above.

btty038

You want to simulate, then search for the model of the varactor in the device library, if it exists, it will be there, if not, it will not be there. It is probably not realistic to build a library yourself.

I am also new to this, and I don't quite understand some of the parameters. I hope you can give me some advice on the model.