From 702b473967e8bf11b28648ac7cb6d2b42c861dd1 Mon Sep 17 00:00:00 2001 From: tlg Date: Fri, 10 Apr 2026 08:20:26 +0200 Subject: [PATCH] Added Circuit_Simulations --- Circuit_Simulations.md | 50 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Circuit_Simulations.md diff --git a/Circuit_Simulations.md b/Circuit_Simulations.md new file mode 100644 index 0000000..6662212 --- /dev/null +++ b/Circuit_Simulations.md @@ -0,0 +1,50 @@ +# Analog circuit simulation: V_BAT change amplifier + +## Parts + +The circuit parts: +- PNP Transistor T1: BC557C +- Zener diode D1: BZX85/5.6 +- Resistor R_Z: 1 Kohms +- Resistor R_E: 240 Ohms +- Resistor R_C: 1 Kohms + +## Schematic + +The schematic: +- Node V_BAT (battery voltage) connected to R_Z, R_E +- Node GND (ground, 0 V) connected to D1 anode, R_C +- Node V_OUT connected to R_C, T1 collector +- T1 collector connected to V_OUT, R_C +- T1 base connected to D1 cathode, R_Z +- T1 emitter connected to R_E +- R_2 connected to V_BAT, T1 base +- D1 anode connected to GND +- D1 cathode connected to R_Z, T1 base +- R_E connected to T1 emitter, V_BAT +- R_C connected to V_OUT, GND + +## Simulation + +The simulation is a DC simulation which takes the analog behavior of +the circuit parts into account. Use the Ebers-Moll model for T1 and +a model which accurately calculates the zener behavior of D1. + +Sweep V_BAT from 5.8 V to 7.8 V in 0.1 V steps. + +Simulate T1 base current, T1 collector current, T1 power dissipation, +D1 current, V_OUT voltage. + +## Your tasks + +First use your ask user questions tool to fully understand the requirements +and your tasks. + +Then get the models for T1 and D1. + +Afterwards create a Jupyter notebook which runs the circuit simulation and +displays the simulated values in graphs. + + + +