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--- lab_electrical_engineering:duty_cycle_adjustment [2026/06/17 12:56] – mexleadmin
+++ lab_electrical_engineering:duty_cycle_adjustment [2026/06/17 14:22] (current) – mexleadmin
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 To analyze how to adjust the duty cycle of the PWM-signal, the following circuit is used:\\
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 <wrap left>
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 ~~CLEARFIX~~
-  - Build the circuit on the MEXLE-board. Connect channel 1 of the oscilloscope to TR and channel 2 to SQ. The duty cycle can be adjusted using R1. Perform the measurements for the minimum, maximum, and midpoint duty-cycle settings with the capacitances **C1 = 10nF** and **C1 = 1nF**. Sketch the oscilloscope screen for each case. \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ **C1 = 10 nF, minimum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$ ~~CLEARFIX~~ \\ **C1 = 10 nF, maximum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$~~CLEARFIX~~ \\ **C1 = 10 nF, middle position**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$~~CLEARFIX~~ \\ **C1 = 1 nF, minimum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$~~CLEARFIX~~ \\ **C1 = 1 nF, maximum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$~~CLEARFIX~~ \\ **C1 = 1 nF, middle position**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$ ~~CLEARFIX~~ \\
+  - Build the circuit on the MEXLE-board. Connect channel 1 of the oscilloscope to TR and channel 2 to SQ. The duty cycle can be adjusted using R1. Perform the measurements for the minimum, maximum, and midpoint duty-cycle settings with the capacitances **C1 = 10nF** and **C1 = 1nF**. Sketch the oscilloscope screen for each case. \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\
+**C1 = 10 nF, minimum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$ ~~CLEARFIX~~
+\\ **C1 = 10 nF, maximum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$
+~~CLEARFIX~~
+\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\
+\\ **C1 = 10 nF, middle position**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$
+~~CLEARFIX~~
+\\ **C1 = 1 nF, minimum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$
+~~CLEARFIX~~
+\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\
+\\ **C1 = 1 nF, maximum duty cycle**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$
+~~CLEARFIX~~
+\\ **C1 = 1 nF, middle position**\\ \\ <wrap left>{{drawio>oscilloscope_screen.svg}}</wrap>\\ \\ \\ Channel 1: $\frac {Volt}{Div}=$\\ \\ Channel 2: $\frac {Volt}{Div}=$\\ \\ \\ Time basis: $\frac {T}{Div}=$
+~~CLEARFIX~~
+\\ \\ \\ \\ \\ \\ \\
   - Explain how this circuit works in a few sentences. \\  \\  \\  \\  \\  \\  \\  \\  \\  \\
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 ====Test Questions - Integrator====
 </WRAP>
+~~PAGEBREAK~~