UPDATE: further experimentation made me realize that the antenna can't be floating, it has to be connected to ground. I can't use Qucs-s because in another circuit I need a triac and Qucs-s lacks of some non linear components (see the related issue). These settings could be corrected later using the Simulation->Select default.
#Qucs simulation stuck simulator#
Select the default simulator using the drop-down list and correct the simulator executable paths if necessary. 1) is opened after the rst start of the application.
#Qucs simulation stuck generator#
In a simple AC generator and R divider circuit, the simulation is stuck at 0. Once the Qucs-S is installed, it asks to select the simulation kernel. Note the increase and the decrease are not symmetric. I'm having the same issue 4 years later with Qucs 0.0.20 on Ubuntu 20.04. A negative input 13mV will cause e-13/26 decrease in current, so vout rises. The Ngspice, Xyce and SPICE OPUS simulators are not embedded in. A positive input 13mV will cause e13/26 increase in current, so vout drops. Spice4qucs includes built-in support for SPICE via a subsystem specifically designed for this purpose.
#Qucs simulation stuck how to#
I appreciate inputs on how to solve the problem as well as how to design a regenerative feedback for the circuit. This section describes a number of fundamental methods for launching circuit simulations from the Qucs GUI using the Ngspice, Xyce and SPICE OPUS compatible simulator engines. Up left is Ve and Vc, up right input (measured at the "antenna") and output (measured at the 2kOhm resistor), low left Vb (base voltage) and low right the input. Congratulation, the first digital simulation is done Figure 1 - Qucs main window A truth table is not the only digital simulation that Qucs can perform. Now the truth table of a two-port AND cell is shown. Place the diagram truth table on it and insert the variable Output. Post simulation, you can view the simulation results on a presentation page or window. After performing the simulation, the data display page opens. The diode and detection circuit is shorted or deactivated because I wanted to analyze first just the transistor output.The DC simulation shows approx the values I calculated for the biasing (1 mA quiscent current, 0,7V bias on the base and 4,5V on the collector) but when I run the AC simulation I get very strange results: Qucs is an integrated circuit simulator that enables you to set up a circuit with its intuitive graphical user interface (GUI) and simulate the small-signal, large-signal and noise behaviour of the circuit. I'm trying to design a small amplifier for AM signals to use before the usual diode-C-R detection (the reception in my area is very poor). Simulation and optimization for efficiency in LT SPICE and designed them accordingly in LTSpice, and at the end combined.
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