All Questions
Tagged with ltspice transistors
85
questions
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Import transistor into LTSpice
I would like to import this transistor -> RFD16N06LE (datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/67811/INTERSIL/RFD16N06LE.html) into LTSpice; the datasheet has a PSPICE model ...
- 9
1
vote
1
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66
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No output in LTspice
I have implemented a simple circuit in LTspice which is as follows:
Now, when I want to view the output in the collector, it displays only one line.
Now let's check it in DC mode:
which is exactly ...
- 145
1
vote
1
answer
117
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Designing circuit parameters with NPN-PNP transistors -LTspice simulation
Below is a part of the circuit I created to drive the MOSFET (it includes level shift, power stage etc.).
Datasheet of 2SC2411K: https://fscdn.rohm.com/en/products/databook/datasheet/discrete/...
- 405
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3
answers
290
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Calculation of transistor values using hFE
I provided a very simple NPN transistor set up and hFE values as shown below.
2N2222 datasheet
I am trying to calculate parameters such as base current, collector current, Vce using hFE (beta).
The ...
- 405
4
votes
1
answer
163
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Design of a BJT Translinear-Based Square-Rooting Circuit
I'm trying to make a simple sqrt circuit to act on an input voltage and provide an output voltage without using log and antilog amplifiers. I'm trying to base my design of the translinear combination ...
- 41
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70
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LTSpice Unknown SPICE device type "N" [closed]
I try to use the model for the BFR106 transistor in LTSpice, which I got from here
https://www.infineon.com/cms/en/product/rf/rf-transistor/high-linearity-rf-transistors/bfr106/?tab=~%...
2
votes
1
answer
81
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Would This Be a Good Bipolar AND Gate?
In my last question, I asked about this schematic that I made:
My question was answered and I got some good advice, so I recreated the circuit with the new knowledge in mind, which looks like this:
...
- 67
1
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2
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64
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LTspice: Troubleshooting a common emitter amplifier
This is a screenshot of a common emitter amplifier my instructor made in LTspice (everything is working fine):
This is my attempt to make the same circuit (it isn't working, there's no amplification ...
- 175
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1
answer
81
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LTspice - simulation of SPWM is giving unexpected result
I am trying to make SPWM with op-amps. I also made a simple NOT gate with a simple transistor.
The first op-amp is working well when its output is not connected. When I directly connect the first op-...
- 405
1
vote
2
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85
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Modelling a Floating Gate Transistor
Does anyone know of a simple circuit diagram to implement in the likes of LTspice to show the operation of a floating gate transistor?
Would a capacitor on the gate of a standard transistor do the ...
- 91
0
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2
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65
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Help troubleshooting Mosfets in Switching Circuit
I've been trying to design a simple circuit to switch between two Supply rails (3.3V_SW & Vbat) while giving one of them a higher priority (3.3V_SW). The circuit in simulation is showing to be not ...
- 79
5
votes
1
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What causes these spikes in an LTspice circuit analysis of a full adder?
For the following full adder circuit:
I get the following output for s (I have the same problem with COUT):
The graph itself is correct, but those spikes should not be there. I know that I have to ...
- 113
0
votes
2
answers
110
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Bizarre behavior with SIN LTSpice
I have this circuit I'm supposed to analyze. I am asked to set v1 to a sine wave V1= A sin (2pi f t) with a frequency f = 1 kHz and A = 5mV. I think I did everything right, but when I run the ...
- 113
1
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1
answer
85
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DC-DC converter possible by using Zener breakdown as input to transistor gate?
Suppose you have a DC voltage source that is higher than required, in this example let's assume one wants a 12V voltage source from a 18V source. Would it be possible to have a circuit, where the ...
- 11
2
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2
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99
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Why are the current-voltage characteristics of a bipolar transistor in MATLAB and LTspice different?
I simulated the 2N5089 bipolar transistor in both programs. The output I-V curve is completely different, although both programs use the Ebers-Moll model.
Spice-model of the transistor:
...
- 21