Aim: To observe the phase shift produced by a simple RC network and view the corresponding Lissajous figure on an oscilloscope. CH1 monitors the input waveform, and CH2 monitors the phase shifted output of the RC network. The GUI is
Learn to use a BJT as an amplifier in the common emitter configuration. The GUI for this is located at Electronics -> Transistor -> Transistor amplifier The input and output waveforms are traced on the oscilloscope using two channels. The gain can be calculated directly using the measure
Launch BJT Output Characteristics GUI from SEELablet - > Electronics -> Transistors -> Transistor CE Prepare the experiment based on the schematic and instructions available in the help section. Resultant Data: The base voltage (thereby base current) is varied and the corresponding I-V curves are plotted.
from SEEL import interface
pv2 = I.set_pv2( 1.0) # Bias the base via a 200K resistor.
base_voltage = I.get_voltage('CH3')
base_current = (pv2-base_voltage)/200e3 # Use Ohm's law to determine current
CollectorCurrent = 
CollectorVoltage = 
for a in np.linspace(0,5,100):
pv1 = I.set_pv1(a)
CollectorCurrent .append( (pv1 - I.get_voltage('CH1') )/1e3 )
from pylab import *
plot(CollectorVoltage,CollectorCurrent ) #Plot and try a different base current
The experiment designer interface allows users to quickly put together a study of phenomena using the control and readback elements that have been incorporated into a common interface. Consider the example of a curve tracer for transistor CE output characteristics. It